Wear-resistant castings in our country has many years of history, the use of its good toughness and good wear resistance, and its good deformation properties, wear-resistant casting in the industrial and mechanical industries in a wide range of use. Wear-resistant castings are made of high-tech materials in the production process, and in order to improve the wear resistance of wear-resistant castings and grinding efficiency, have begun to use very high materials, and the introduction of international advanced production technology to improve resistance Abrasion resistance of castings. In fact, we do not have to worry about the service life of wear-resistant castings, wear-resistant castings generally can be used for 20 years, if the maintenance work done at work, but also to extend the life of wear-resistant castings.
Wear-resistant castings on the micro-cutting mechanism of abrasive wear, wear-resistant castings to improve the hardness is conducive to improving the wear resistance. For abrasive wear of the fatigue spalling mechanism, the higher hardness of the wear resistant castings in combination with good ductility and toughness, particularly with good fracture toughness, low crack propagation rate and high impact fatigue resistance, is in favor of Increased wear resistance.
There are several ways to temper wear-resistant castings
1. Low temperature tempering (temperature of 150 ~ 250 ℃). Tempering the resulting low-temperature tempered martensite, the purpose is to maintain the high hardness of hardened steel and high wear resistance under the premise of reducing its internal stress quenching and brittleness, to avoid cracking or premature failure.
2.Temperature tempering (temperature is 350 ~ 500 ℃). Tempering the temperature obtained in the organization for the tempering of the body, its purpose is to obtain high yield strength, elastic limit and high toughness, mainly for a variety of hot die processing.
3. High temperature tempering (temperature is 500 ~ 650 ℃). Tempering the resulting high-temperature tempering organization sorbite, the customary combination of quenching and tempering heat treatment called quenching and tempering treatment, its purpose is to obtain the strength, hardness, ductility and toughness are better overall mechanical properties.