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Tongda uses several stainless steel casting technics to cast components in China.Stainless steel casting technics is silica sol casting. This is also the most preferred investment casting process to cast stainless steel castings in China. Stainless steel castings made by silica sol casting technics is more accurate on dimensions and better on surface roughness. Comparing with other stainless steel casting technics, silica sol casting process is with higher prices. Weights of stainless steel castings are mostly controlled between 0.1kg - 50kgs. We use green/browen wax during the silica sol casting process for stainless steel castings.
When making stainless steel investment castings,we often meet shell expansion defect.Shell expansion defect is caused by volume solidification mode of modular cast iron ally and graphitization expansion in the process of eutectic transformation.Below Tongda will talk about how we will solve this problem.
Tongda supplies 17-4PH Stainless Steel Investment Castings in China for a long time. Specification of 17-4PH Stainless Steel 17-4PH Stainless Steel is a kind of martensitic precipitation-hardening steel. The Chinese specification is 0Cr17Ni4Cu4Nb. Adding Cu element increased the hardening property of the 17-4PH stainless steel.
First of all, we were back from the Festival and resume to work .Let’s develop a bigger market together in the New Year, welcome to come to inquire. Precision casting is another name of investment casting, also called lost wax casting. It refers to make machinery components in lost wax casting process. Tongda is professional on the precision casting process.
Casting, also called pouring, is the most important process during steel castings manufacturing. If this process is not properly managed, the scrap rate of the steel castings will be very high. Thus, during steel casting production process, our investment casting factory builds strict requirements and attention matters on every operations. The workers are also trained with all announcements before starting casting process.
When designing the mold structure of investment castings,we should try to make the structure impact and the operation should be very convenient.Meanwhile,also should ensure mold parts have enough strength and stiffness.In the allowed conditions of mold structure,the surface corner of mold parts should be designed as much as possible into the rounded transition,in order to avoid stress concentration.
