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The Machining Process Characteristics Of 316L Stainless Steel Precision Casting.
Feb 02, 2018

Cast iron without 316L stainless steel precision casting has good mechanical properties, but its cast iron performance is better than casting, which belongs to precision casting or investment casting precision casting. The melting point is high, the liquid of molten steel is poor, the shrinkage is large, the molten steel is easy to oxidize, and 316L stainless steel precision casting is not only suitable for various kinds of alloy and various types of casting.

Machining process characteristics of 316L stainless steel precision casting:

1, because of the cast iron is far from 316 l stainless steel precision casting shrinkage is big, in order to prevent shrinkage, shrinkage defects of castings, riser and mostly on the casting process, subsidies and cold iron and other measures, in order to realize the solidification sequence.

In order to prevent 316 l stainless steel castings, shrinkage, porosity, shrinkage cavity and crack defects, should be to avoid sharp corners, direct structure and uniform thickness, add coke to the core, in the mould with sand adding sawdust, hollow core and sand core is used to improve the sand mold or core permeability and rolled back.

2. Due to the poor flow of 316L stainless steel, the wall thickness of 316L stainless steel steel parts cannot be less than 8mm in order to prevent the casting of 316L stainless steel castings from being insufficient and cold. Using hot casting and dry mold, properly increasing pouring temperature, generally is 1520 ° ~ 1600 ℃, because of the high pouring temperature, liquid steel superheat, keep long liquid, liquid can be improved. Due to high temperature, 316L stainless steel thermal crack, stoma, grain size and grit and so on. So generally small, thin wall and complex shape precision castings, the pouring temperature is about steel melting point temperature of + 150 ℃; The structure of the pouring system is simple and the section size is larger than that of cast iron. Instead of large, thick wall castings pouring temperature higher than the melting point of 100 ℃ or so.