How to overcome the shortage of powder metallurgy stainless steel

How to overcome the shortage of powder metallurgy stainless steel

How to overcome the shortage of powder metallurgy stainless steel? We know the shortcomings of the powder metallurgy stainless steel technology. If the smelting process is used to produce stainless steel products, due to the difficulties in machining, there will be a series of arrangements for the manufactured parts, such as poor dimensional accuracy, insufficient surface roughness, etc. Powder metallurgy plays an important role in solving similar problems. So how to overcome the shortage of powder metallurgy stainless steel? Zhongwei Precision Powder Metallurgy Gear Processing Instructions:

Compared with stainless steel produced by traditional smelting process, powder metallurgy stainless steel has many advantages, such as parts close to net forming, high dimensional accuracy, high material utilization rate, uniform organizational structure, etc., and has been widely used in machinery, chemical industry, ships, automobiles, instruments and meters and other industries. However, it does not mean that the powder metallurgy stainless steel is perfect. Because of its internal porosity, the mechanical properties, wear resistance and corrosion resistance of the powder metallurgy stainless steel are greatly reduced, which severely limits the application of this product.

Powder metallurgy parts

However, some studies have proved that almost all properties of powder metallurgy stainless steel increase with the increase of density. Therefore, as long as the density of powder metallurgy stainless steel is increased and its porosity is reduced, it can play a key role in improving the properties of powder metallurgy stainless steel.

The reason why a large number of voids remain in the interior of powder metallurgy stainless steel has a lot to do with the solid phase sintering method, so some users began to replace it with ultra solid phase line liquid phase sintering, so that the stainless steel prealloyed powder formed a liquid phase during sintering, and the liquid phase filled the pores through the flow to improve the density and performance of the sintered body.

Different from ordinary liquid-phase sintering, super solid-liquid sintering is the sintering of prealloyed powder, and it is always a single phase in the sintering process, and the sintering temperature will always be between solid-liquid lines. Moreover, the particles are rearranged under the action of liquid capillary force, and the sinter is dense through liquid flow mass transfer.

Do you know how to overcome the shortcomings of powder metallurgy stainless steel? In addition to the above methods shared by zhongwei precision powder metallurgy manufacturers, it is also one of the main ways to improve the performance of powder metallurgy stainless steel by adding appropriate strengthening phases, especially its hardness and wear resistance. If you need powder metallurgy parts, please call Zhongwei Precision.