Influence of powder characteristics on injection molding of metal powder

Date：2018/11/27Type：Company News

Keywords：大宏新材料,MIM技术,粉末冶金,MIM陶瓷表壳,MIM智能穿戴,粉末冶金微型齿轮,金属粉末注射成型

The purpose of metal powder injection molding is to obtain the desired shape of defect-free, evenly distributed particles from the MIM forming body. However, the possible defects of metal powder injection molding are formed in the production, and some situations beyond our control may occur. However, these defects are often not found until degreasing and sintering release, so here small series of dahong new materials especially remind everyone to pay attention to, the choice of powder will also have a certain impact on the whole process. Metal powder injection molding MIM has higher requirements on raw material powder, powder selection should be conducive to mixing, injection molding, degreasing and sintering, and this is often contradictory, the study of MIM raw material powder includes: powder shape, particle size and particle size composition, specific surface, etc.. So what are the effects of powder properties on injection molding of metal powder? Next by the macro new material xiaobian to do a simple introduction.


1. Fine powder size, advantages are fast sintering, small forming defects, good shape-keeping property of green billet, but slow degreasing speed, large sintering shrinkage, high feed viscosity, poor fluidity.


2. Spherical particles have the advantages of high compaction density and good fluidity, but the disadvantage is that the green billet has low strength, is easy to be dented when degreasing, and generally has a high cost.


3. The advantages of wide particle size distribution are high density of vibration and good conformability, but the microstructure is inconsistent.


Because of the metal powder injection molding requirements for raw material powder is very fine, powder raw material prices generally higher, or even to traditional PM 10 times the price of powder, this is the limit technology widely used a key factor, the method of the raw material for production of powder carbonyl method, ultra-high pressure water atomization method, high pressure gas atomization method, etc.


The above is about the influence of powder characteristics on metal powder injection molding introduced by dahong new material xiaobian, more about MIM technology and MIM material related content, welcome to consult guangdong dahong new material metal powder injection molding MIM technology professional team to answer for you!

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