In recent years, China through continuous introduction of foreign advanced technology combining with self-development and innovation, makes the powder metallurgy industry and technology in China shows a tendency of rapid development. It is one of the fastest growing China's mechanical generic components, China yearly uotput of powder metallurgy industry growth rate is 35%.
Powder parts molding machine is hydraulic four-post type structure, the application is mainly powder metallurgy structural parts and machinery parts production. At the same time can also be applied to iron, copper, aluminum, stainless steel powder, ceramic powder, electronic ceramics, graphite and the forming of cemented carbide products. Pressing technology and finishing technology reached the international advanced level.
Global manufacturing is accelerating transfer to China, automobile industry, machinery manufacturing, metal industry, aerospace, instruments and meters, hardware tools, construction machinery, electronic appliances, high-tech industry rapid development. Has brought the powder metallurgy industry rare development opportunity and huge market space. In addition, the powder metallurgy industry is listed in the priority to the development and encourage foreign investment projects, the development prospect is broad.
Tuesday, November 8, 2016
Wednesday, November 2, 2016
Powder metallurgy high strength aluminum alloy
In order to further improve the performance of the aluminum alloy, nano phase and nano intermetallic compound
dispersion strengthening alloy research has aroused the concern of the national technicians. A new type of alloy
nanoparticles toughening reinforcement, will greatly improve the strength of the material, and reduce the usage amount of material. Nanoparticles toughening reinforcing material for its high strength, high toughness, low temperature superplasticity, easy processing, low density, good performance, in the aircraft, spacecraft and automobile industry has a good application prospect.
Due to the small size effect of nanometer materials and surface and interface effect caused by the increase of surface atomic activity, so the material sintering is easier. It has the advantages of low sintering temperature, short sintering time, sintered body with good sintering performance can be obtained. In general, small uniform microstructure and complete densification is requirements of nanomaterials to achieve the best performance. Traditional molding, isostatic compaction, extrusion, injection molding, explosive forming of powder metallurgy forming method can be used in nano powder molding. Pressureless sintering process is simple and is low cost. Hot pressing (HP), isostatic pressing sintering (RS) and reaction hot-pressing sintering compared with pressureless sintering, the sintering temperature is much lower and higher density can be obtained.
Microwave sintering (MS), self-propagating high temperature synthesis (SHS), plasma sintering and electric spark
sintering is the latest sintering methods developed in recent years. But because nano powder is extremely fine, its apparent density is very low, so will cause the compact density is uneven, so that the density of sintered body hard meet the theoretical density. Although nano powder has great specific surface area, and high sintering activity. Nanoparticles still grew rapidly at high temperature, and before that have not reached full densification, grain size will grow up to 100 nm. And thus has method to make block nano materials with fully densification and grain size is less than 100 nm. Therefore, the research emphasis of the preparation of nanometer materials is the control of grain growing up.
The study found that the heat forging technology can effectively overcome the lack of hot pressing. Such as 1100 ℃ can make ZrO2-3% Y2O3 fully densification, the average grain size is 85 nm. In addition, the consecutive extrusion forming and molding in instantaneous high pressure pulse can improve the compact density. Rapid sintering methods such as microwave sintering, its temperature rising (500 ℃ / min) fast, short heating time (2 min), solved the problem of the nanometer grain abnormal grew up. Sintered density, however, it is difficult to achieve theoretical density, so nanomaterials is unlikely to achieve the best mechanical properties.
At present, because of price and technology, the application of powder metallurgy of high strength aluminum alloy is mainly limited in the field of aviation, aerospace. Along with the advance of technology and development, raw material costs will continue to decline, will be applied in the automotive industry massively.
dispersion strengthening alloy research has aroused the concern of the national technicians. A new type of alloy
nanoparticles toughening reinforcement, will greatly improve the strength of the material, and reduce the usage amount of material. Nanoparticles toughening reinforcing material for its high strength, high toughness, low temperature superplasticity, easy processing, low density, good performance, in the aircraft, spacecraft and automobile industry has a good application prospect.
Due to the small size effect of nanometer materials and surface and interface effect caused by the increase of surface atomic activity, so the material sintering is easier. It has the advantages of low sintering temperature, short sintering time, sintered body with good sintering performance can be obtained. In general, small uniform microstructure and complete densification is requirements of nanomaterials to achieve the best performance. Traditional molding, isostatic compaction, extrusion, injection molding, explosive forming of powder metallurgy forming method can be used in nano powder molding. Pressureless sintering process is simple and is low cost. Hot pressing (HP), isostatic pressing sintering (RS) and reaction hot-pressing sintering compared with pressureless sintering, the sintering temperature is much lower and higher density can be obtained.
Microwave sintering (MS), self-propagating high temperature synthesis (SHS), plasma sintering and electric spark
sintering is the latest sintering methods developed in recent years. But because nano powder is extremely fine, its apparent density is very low, so will cause the compact density is uneven, so that the density of sintered body hard meet the theoretical density. Although nano powder has great specific surface area, and high sintering activity. Nanoparticles still grew rapidly at high temperature, and before that have not reached full densification, grain size will grow up to 100 nm. And thus has method to make block nano materials with fully densification and grain size is less than 100 nm. Therefore, the research emphasis of the preparation of nanometer materials is the control of grain growing up.
The study found that the heat forging technology can effectively overcome the lack of hot pressing. Such as 1100 ℃ can make ZrO2-3% Y2O3 fully densification, the average grain size is 85 nm. In addition, the consecutive extrusion forming and molding in instantaneous high pressure pulse can improve the compact density. Rapid sintering methods such as microwave sintering, its temperature rising (500 ℃ / min) fast, short heating time (2 min), solved the problem of the nanometer grain abnormal grew up. Sintered density, however, it is difficult to achieve theoretical density, so nanomaterials is unlikely to achieve the best mechanical properties.
At present, because of price and technology, the application of powder metallurgy of high strength aluminum alloy is mainly limited in the field of aviation, aerospace. Along with the advance of technology and development, raw material costs will continue to decline, will be applied in the automotive industry massively.
Tuesday, October 25, 2016
The heat treatment process in MIM production
After 30 years of development, our country Guangdong area is finally formed today's complete market economy oriented pattern of specialized production heat treatment. Of course, now the Guangdong heat treatment industry in addition to produce mold and its accessories, also produce a large number of mechanical parts, hardware accessories, etc. But the mold heat treatment is still the main products of the industry, now still occupies more than 60% market share. At present, Guangdong heat treatment industry group has about 600 factories, most factories has mold processing business.
In mid and late 1980’s, the endeavor to reform and opening up of market economy are springing up in Guangdong area. Household electrical appliances, light industry machinery, metal products, furniture, and aluminum and stainless steel material manufacturing developed rapidly. Especially the Pearl R0iver Delta region, as the pioneer of reform and opening up, the market consciousness, exploring spirit, reform, and economic development and capital accumulation are changing with each passing day.
Due to the drive force of rapid development of the manufacturing industry chain, a considerable scale heat treatment industry group was born at the right moment in Guangdong where is almost blank in before. And experienced social production, mass production and until the specialized production process. While the start of Guangdong heat treatment industry, has connected with the development of die and mould industry. According to introducing, due to the manufacturing industry fast development, the mould demand is very big, thus different sizes of mould processing plants in the Pearl River Delta region dotted with soon.
But heat treatment as a key processing in mold manufacturing chain, in the 80's almost could not be found in the Pearl River Delta region, guangdong has no professional heat treatment factory. Large number of molds had to be sent to Guangzhou large enterprises and institutions of higher learning and scientific research institutes affiliated internal heat treatment factory for heat treatment. But doing so often have the "far water does not put out near fire" feeling, to the entrepreneurs who see "time is money, efficiency is life" at the forefront of reform and opening-up, there is no other better ways. It is in this background, firstly in the Pearl River Delta region began to initiate some private heat treatment factories engaged in the mold heat treatment. In these private heat treatment factories, some attached to the mold factory, some are professional factories providing services to featured products. Nanhai district, Foshan city, such as large-scale aluminum manufacturing industry "raises" a lot of heat treatment factories specialized production of aluminum extrusion die. Demand for MIM mould are also moving in Shenzhen area promoted Shenzhen mold industry and the development of heat treatment industry.
In mid and late 1980’s, the endeavor to reform and opening up of market economy are springing up in Guangdong area. Household electrical appliances, light industry machinery, metal products, furniture, and aluminum and stainless steel material manufacturing developed rapidly. Especially the Pearl R0iver Delta region, as the pioneer of reform and opening up, the market consciousness, exploring spirit, reform, and economic development and capital accumulation are changing with each passing day.
Due to the drive force of rapid development of the manufacturing industry chain, a considerable scale heat treatment industry group was born at the right moment in Guangdong where is almost blank in before. And experienced social production, mass production and until the specialized production process. While the start of Guangdong heat treatment industry, has connected with the development of die and mould industry. According to introducing, due to the manufacturing industry fast development, the mould demand is very big, thus different sizes of mould processing plants in the Pearl River Delta region dotted with soon.
But heat treatment as a key processing in mold manufacturing chain, in the 80's almost could not be found in the Pearl River Delta region, guangdong has no professional heat treatment factory. Large number of molds had to be sent to Guangzhou large enterprises and institutions of higher learning and scientific research institutes affiliated internal heat treatment factory for heat treatment. But doing so often have the "far water does not put out near fire" feeling, to the entrepreneurs who see "time is money, efficiency is life" at the forefront of reform and opening-up, there is no other better ways. It is in this background, firstly in the Pearl River Delta region began to initiate some private heat treatment factories engaged in the mold heat treatment. In these private heat treatment factories, some attached to the mold factory, some are professional factories providing services to featured products. Nanhai district, Foshan city, such as large-scale aluminum manufacturing industry "raises" a lot of heat treatment factories specialized production of aluminum extrusion die. Demand for MIM mould are also moving in Shenzhen area promoted Shenzhen mold industry and the development of heat treatment industry.
Tuesday, October 18, 2016
breaking pads made with powder metallurgy
With increasing car ownership in our country, the production of brake pad is also increasing year by year. Brake pads is the key components of train brake system. The quality of the high-speed rail brake pads is directly related to the train speed can slow down and stop in time, called "the patron saint of life".
With the rapid development of high-speed railway in China, its various performance requirements also corresponding increase, especially puts forward more strict requirements on braking performance. The braking power and speed of the train is cubic relationship, that is to say, the train speed double then braking power requires increased 8 times. High-speed train braking force mainly include electric braking force and friction, the friction braking is train safe parking final guarantee. Friction braking force comes from the friction between the brake disc and brake pads on the braking system. And in the braking system brake pads performance has very big affect on the train braking effect. Brake pad materials at home and abroad mainly experience metal, alloy and powder metallurgy etc.
In the world there is only a few countries such as Germany, France and Japan can produce high-speed train brake pad. Among them Germany Knorr company Monopolies more than 80% of the global high iron brake pads market. High-speed trains in China since its opening, the brake pads of braking system relies on imports for long-term. Import brake pads has problems aush as high price, long cycle of supply, spare parts supply not in time and poor after-sales service. High-speed rail brake pads is n technology protection period before 2012, has been importing foreign products. In recent years the domestic represented by Tianyishangjia and PuRan private enterprises gradually enter the field of high-speed rail brake pads. Tianyishangjia in September 2013 got seven models 5 types of brake pads CRCC certificate of railways product, PuRan got CRCC certification in 2014. In 2015, BoShen tool has finished the high-speed train brakes 1:1 brake friction wear performance test.
With the rapid development of high-speed railway in China, its various performance requirements also corresponding increase, especially puts forward more strict requirements on braking performance. The braking power and speed of the train is cubic relationship, that is to say, the train speed double then braking power requires increased 8 times. High-speed train braking force mainly include electric braking force and friction, the friction braking is train safe parking final guarantee. Friction braking force comes from the friction between the brake disc and brake pads on the braking system. And in the braking system brake pads performance has very big affect on the train braking effect. Brake pad materials at home and abroad mainly experience metal, alloy and powder metallurgy etc.
In the world there is only a few countries such as Germany, France and Japan can produce high-speed train brake pad. Among them Germany Knorr company Monopolies more than 80% of the global high iron brake pads market. High-speed trains in China since its opening, the brake pads of braking system relies on imports for long-term. Import brake pads has problems aush as high price, long cycle of supply, spare parts supply not in time and poor after-sales service. High-speed rail brake pads is n technology protection period before 2012, has been importing foreign products. In recent years the domestic represented by Tianyishangjia and PuRan private enterprises gradually enter the field of high-speed rail brake pads. Tianyishangjia in September 2013 got seven models 5 types of brake pads CRCC certificate of railways product, PuRan got CRCC certification in 2014. In 2015, BoShen tool has finished the high-speed train brakes 1:1 brake friction wear performance test.
Wednesday, October 12, 2016
Powder metallurgy become one of the three largest benefit links of wearable devices
Since the beginning of the "smart wave acceleration innovation, Chinese enterprises rise" report to repeated analysis Google will lead the wave of innovation for the next five years. Apple will accelerate innovation, wearable devices will be another hot spot after smartphones, further analysis is as follows:"from small to big, and then from big to small" the cycle of 2009 apples open smartphone wave, As smartphones screensize grow from 3.5 inch to 5-6 inches, now it is limited. Future consumer electronics innovation will enter the era of frombig to small size, all kinds of wearable will be released next year densely. Smart watches, apple iWatch went draw ahead(there will be the product distribution of all kinds of class), Google xWatch behind, a large number of imitators.
Smart glasses, GoogleGlass user version is more and more close, a large number of imitators to follow up, besides xEye etc. new products also in research and development. Wearable devices via bluetooth 4.0 technology and sensor technology will further solve human entertainment, social, life, education and health care needs. And explore and innovate applications outside of all kinds of consumer electronics.
FPC, mems, and powder metallurgy: three big benefit links of wearable devices. The weekly newspaper and report
analysis for many times, after the outbreak of wearable equipment mems, FPC and powder metallurgy are the three most benefit industries. The combination of these three application will bring more user experience, more data sensing, more deformation application. Make people's entertainment, work, social, education and health care demand combine better.
Smart glasses, GoogleGlass user version is more and more close, a large number of imitators to follow up, besides xEye etc. new products also in research and development. Wearable devices via bluetooth 4.0 technology and sensor technology will further solve human entertainment, social, life, education and health care needs. And explore and innovate applications outside of all kinds of consumer electronics.
FPC, mems, and powder metallurgy: three big benefit links of wearable devices. The weekly newspaper and report
analysis for many times, after the outbreak of wearable equipment mems, FPC and powder metallurgy are the three most benefit industries. The combination of these three application will bring more user experience, more data sensing, more deformation application. Make people's entertainment, work, social, education and health care demand combine better.
Wednesday, September 28, 2016
Reduced iron powder has become irreplaceable high-grade mate
Reduced iron powder is the foundation of advanced powder metallurgy and soft magnetic induction device materials. The products because of the high machinability, can be made into all kinds of thin, special shape components, with a strong impact resistance, corrosion resistance, wear resistance and high strength characteristics, widely used in automobiles, machinery, ships, locomotives, etc. Is a high grade material cannot be replaced by the iron and steel made on pure melting.
In addition in the transformer core, electric induction device, high quality electrode, xerox, chemical industry, medical and food preservation is applied widely. With the development of science and technology, the application areas of high purity iron powder will be more and more widely, using amount is becoming bigger and bigger.
According to analysis, the initial raw material of reduced iron powder is iron oxide, mainly exists in the erroferric(Fe3O4) oxide. Due to the original hydrogen reduction effect is not very good, so change to tunnel kiln using carbon as reductant to restore the product, the reduction efficiency is relatively high. So using carbon as the reducing agent in once reduction in deoxidization, the method is widely used.
Thus, powder metallurgy with reduced iron powder production process is also a kind of once reduction, so generally choose carbon namely coke as a reducing agent for reduction, at the end get the semi-finished product sponge iron. Form replacement sponge copper iron powder, of course, this is not the final product, but also on the broken again after processing to the secondary reduction, can use hydrogen as a reducing agent for reduction at this moment, to get the product we want.
In addition in the transformer core, electric induction device, high quality electrode, xerox, chemical industry, medical and food preservation is applied widely. With the development of science and technology, the application areas of high purity iron powder will be more and more widely, using amount is becoming bigger and bigger.
According to analysis, the initial raw material of reduced iron powder is iron oxide, mainly exists in the erroferric(Fe3O4) oxide. Due to the original hydrogen reduction effect is not very good, so change to tunnel kiln using carbon as reductant to restore the product, the reduction efficiency is relatively high. So using carbon as the reducing agent in once reduction in deoxidization, the method is widely used.
Thus, powder metallurgy with reduced iron powder production process is also a kind of once reduction, so generally choose carbon namely coke as a reducing agent for reduction, at the end get the semi-finished product sponge iron. Form replacement sponge copper iron powder, of course, this is not the final product, but also on the broken again after processing to the secondary reduction, can use hydrogen as a reducing agent for reduction at this moment, to get the product we want.
Sunday, September 18, 2016
row material
Metamaterials (Metamaterial) is a kind of new material of the 21st century, it has special properties that natural
materials do not have, which mainly come from the artificial special structure. At present these materials mainly used in the field of electromagnetic and acoustics.
Recently, the British media said, Xi'an, China and the defense technology company has set up a metamaterial national defense research and development center. The company mainly engaged in the continuous wave radar, photoelectric, sonar detection system research, the production of "hunt shadow" short-range air defense information systems and other equipment appearanced at the Zhuhai airshow.
British media reported that China Xi'an and defense technology company is one of the fastest growing private companies in China, the company recently announced it will set up a metamaterial defencs research and development center The company announced on June 24, the new facility will focus on the application of metamaterials to research in the field of military and aerospace, the so-called metamaterials is a kind of artificial composite materials, has the structure not found in nature materials.
Read more
materials do not have, which mainly come from the artificial special structure. At present these materials mainly used in the field of electromagnetic and acoustics.
Recently, the British media said, Xi'an, China and the defense technology company has set up a metamaterial national defense research and development center. The company mainly engaged in the continuous wave radar, photoelectric, sonar detection system research, the production of "hunt shadow" short-range air defense information systems and other equipment appearanced at the Zhuhai airshow.
British media reported that China Xi'an and defense technology company is one of the fastest growing private companies in China, the company recently announced it will set up a metamaterial defencs research and development center The company announced on June 24, the new facility will focus on the application of metamaterials to research in the field of military and aerospace, the so-called metamaterials is a kind of artificial composite materials, has the structure not found in nature materials.
Read more
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