Corrosion-resistant cast steel material for automobile parts

Abstract

The invention discloses a corrosion-resistant cast steel material for auto parts, which is made of the following raw materials in parts by weight: steel scrap (iron content not less than 98%) 95-98, Z18 pig iron 2-3, crystalline silicon 0.7-0.75, Carbon 0.3-0.35, niobium 0.04-0.05, titanium 0.4-0.5, manganese 1.2-1.3, chromium 0.04-0.05, calcium silicide 0.8-0.86, gelatin 0.2-0.23, lime powder 0.2-0.24, calcium fluoride 0.3-0.4, heavy Crystal 0.5-0.55, impurity ≤ 0.01. The invention can improve the intergranular corrosion and improve the corrosion resistance of the cast steel material by rationally configuring the ratio of element components and the production process, and adding elements such as titanium and niobium; The auto parts produced are corrosion-resistant, low-temperature resistant, and have a long service life.

Description

technical field

[0001] The invention relates to the technical field of casting materials, in particular to a corrosion-resistant cast steel material for auto parts. Background technique

[0002] The automobile axle is one of the key parts of the automobile. It is not only a part of the transmission system, but also an important part of the driving system. As the main part of the axle, the automobile axle housing is a key component to ensure the normal operation and service life of the automobile, so it has high requirements for its mechanical strength, stiffness and fatigue resistance. The production cost of the axle housing accounts for about 30% of the total cost of the drive axle. Especially when heavy-duty vehicles are working due to harsh roads and working conditions, the axle housing is subjected to strong impact loads, and the quality requirements for the axle housing are higher. Due to the limitations of its own structure and welding process, the plate-welded axle ...