High chromium cast iron is a multi-component alloy with iron, chromium and carbon as the basic components, which has high hardness, high heat resistance, high wear resistance and high chemical stability, and is widely used in the manufacture of wear-resistant parts working at high temperatures above 800℃. Its chemical composition mainly includes carbon (2.0%-3.6%), silicon (1.2%-2.0%), manganese (0.3%-1.2%), sulfur and phosphorus (none exceeding 0.05%), and chromium (10%-30%, usually 15%-22%) as the main alloying elements. In addition, elements such as nickel, molybdenum and copper may also be contained, but at low levels. 12
Heat treatment of high chromium cast iron has significant influence on its properties. Common heat treatment methods include annealing, normalizing, quenching and tempering, etc. By adjusting heat treatment parameters, its hardness, toughness and wear resistance can be further optimized to meet different application needs.
