What Are The Difficulties in machining on Stainless Steel Castings

The shrinkage rate of stainless steel is much larger than that of cast iron, so in order to prevent the defects of shrinkage and shrinkage of stainless steel  castings, the foundries have adopted riser and cold iron and subsidies and other measures in the casting process. So what are the difficulties of stainless steel casting processing?

1, the work hardening of stainless steel castings is serious: the tendency of work hardening is large when cutting, and the cutting tool is cut in the work hardening area, which will shorten the life of the tool.

2, the cutting force is large, the cutting temperature is high: the strength of stainless steel is large, the tangential stress is large and the plastic deformation is large when foundry cuts, so the cutting force is large. In addition, the thermal conductivity of stainless steel is very poor, and the high temperature is often concentrated in the narrow area near the cutting edge of the tool, which accelerates the wear of the tool.

3, stainless steel casting processing is easier to stick the knife: no matter what kind of stainless steel, there are processing chips strong and high cutting temperature characteristics.

4, tool wear speed up: stainless steel contains high melting point elements and plasticity, high cutting temperature, resulting in faster tool wear, sharpening and tool change frequently, which affects the production efficiency of steel casting manufacturers, improve the cost of using tools.

In summary, all the above are the difficulties of foundries in processing stainless steel castings. We should also pay attention to this problem when casting stainless steel to prevent unnecessary consumption.