Wear-resisting farm machinery parts and heat treatment process thereof

Abstract

The invention discloses cast iron for wear-resisting farm machinery parts and a heat treatment process thereof. The invention provides cast iron for farm machinery parts, which has good tenacity, high hardness and high wear-resisting performance and accords with American A532IIIM standard as well as the heat treatment process of the cast iron. The invention not only provides the proportional relationship of all ingredients in the cast iron, but also provides the heat treatment process of the cast iron. The heat treatment process comprises the following steps of: casting, forming and polishing the cast iron, preserving the temperature for 60 minutes at 920 + / -10 DEG C and then quenching in air; and preserving the temperature for 120 minutes at 230+ / -10 DEG C, and then tempering at low temperature. By adopting the heat treatment process, the cast iron stably improves the casting hardness to more than HRC52, and has high wear resistance and tenacity.

Description

technical field [0001] The invention belongs to the field of cast iron used for wear-resistant agricultural machinery accessories, in particular to a cast iron used for wear-resistant agricultural machinery accessories and a heat treatment process for the cast iron. Background technique [0002] In recent years, due to the rapid development of agricultural mechanization, the application of high wear-resistant castings has continued to expand. At present, although many studies have been carried out on high wear-resistant cast iron in China, most of them are researched on wear resistance, and there are few studies on improving the toughness of castings, especially how to use heat treatment to improve wear resistance and improve Research on Resilience. my country is a large agricultural country, but agricultural mechanization started late, and research on wear-resistant parts of agricultural machinery is less and progress is slow. So far, the wear-resistant agricultural machi...

AI Technical Summary

Problems solved by technology

So far, the wear-resistant agricultural machinery parts produced by domestic factories generally have low service life and high overall cost, which affects the development level of agricultural mechanization

[0003] The performance of high wear-resistant cast iron is mainly high hardness and good wear resistance. The disadvantage is that it has poor toughness and is easy to break under stress.