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 solve this problem.

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 a......

Tongda precision casting focuses on the techniques of silica sol, water glass，shell mould and lost-foam castings. The materials we are dealing with are stainless steel, carbon steel, alloy steel, ductile iron, grey iron and so on.

Investment casting process is suitable for most metal parts.With this process,we could cast many investment castings with different metals and alloys that have high temperature properties for use in a range of applications,and especially suited to small castings ranging from 0.1kg-60kg.

Die casting process is the use of machine, mold and alloy and other three elements, the pressure, speed and time unified process. Used for metal hot working, the existence of pressure is the main characteristics of die casting process different from other casting methods. Pressure casting is a fast ......

Normally,our customers pay more attention to whether we could make investment castings they need.In fact,even the best casting foundry could also make out unqualified products.So we also need to do quality control of investment castings to serve our customer better.