Manufacture method of stainless steel, carbon steel precision casting surface shell

Abstract

The invention discloses a manufacturing method of a surface layer shell which is precisely cast by stainless steel and carbon steel, which is characterized by being completed by the following production steps of: (1) preparing a refractory coating; (2) preparing a surface layer shell; and (3) drying the surface layer shell. As mullite sand of 80 to 100 meshes instead of expensive imported zircon sand is adopted in an adhesive layer, the manufacturing method of a surface layer shell which is precisely cast by stainless steel and carbon steel reduces the production cost; as in the preparation of the refractory coating, appropriate wetting agents and anti-foaming agents are added into silicone liquid and zircon powder is used, the performance of the shell is changed and the shell is caused to be good in permeability; as the flow rate of the refractory coating is controlled to be 38 to 45s, the roughness value of a cast piece is low. By testing, performance indexes of cast products of the surface layer shell which are made in the precise casting by the method meet the standard requirements; the surface layer shell is not only high in size precision and low in surface roughness value, but also the production cost can be reduced by 10 to 20 percent.

Description

technical field [0001] The invention relates to a manufacturing method of a casting mold shell, in particular to a manufacturing method of a stainless steel and carbon steel precision casting surface layer mold shell which uses silica sol as a binder and uses mullite sand instead of zircon sand. technical background [0002] With the rapid development of science and technology, the use of stainless steel and carbon steel precision castings is becoming more and more extensive. Except for aviation and weapons, they are also used in almost all industrial sectors, especially electronics, petroleum, chemical industry, transportation, light industry, textiles, and pharmaceuticals. , medical devices, pump and valve components. Stainless steel and carbon steel are produced by investment precision casting, which is a casting process with little or no cutting. The castings produced have high dimensional accuracy, low surface roughness, high flexibility and strong adaptability, especia...

AI Technical Summary

Problems solved by technology

From the above analysis, at present, the silica sol surface shell of zircon powder or zircon sand is completely used. The obvious disadvantages of the silica sol surface layer shell made of powder or zircon sand are: first, because the zircon powder and zircon sand used are expensive, and my country is a country lacking zircon sand, this zircon powder or Zircon sand is all dependent on imports, which increases the manufacturing cost of the surface shell; second, the shell made entirely of zircon powder and zircon sand has poor air permeability and easily causes pores, which also affects stainless steel, carbon, etc. The quality of steel precision castings