Wear-resistant alloy cast steel

Abstract

The invention relates to a wear-resistant alloy cast steel, which is particularly suitable for the use with field exploitation equipment, is capable of meeting the demands of harsh environments like high strength, low temperature and the like, and includes ultrahigh strength and toughness; the cast steel contains the chemical components and mass percents thereof as below: 0.27-0.32 of C; 0.70-0.90 of Mn; 0.90-1.30 of Si; 1.40-1.80 of Cr; 0.10-0.20 of Mo; 0.10-0.20 of Ni; and 0.02-0.03 of Ti. The alloy steel has the advantages of simple production technology, low cost, high strength and toughness, good hardenability and no pollution, can meet the manufacturing demand of wear-resistant project mechanical equipment which comes into contact with frozen rocks and permafrost in low temperature environment such as minus 20 DEG C to 0 DEG C, and is suitable for long-term operation in cold zone environment.

Description

technical field [0001] The invention relates to a wear-resistant alloy cast steel, in particular to wear-resistant alloy cast steel with ultra-high hardness and toughness, which can be used in multi-spinning mining equipment in the field, can be adapted to harsh environmental requirements such as high strength and low temperature. Background technique [0002] Wear and tear is common in many industrial sectors such as metallurgy, mining, machinery, electric power, chemical industry, building materials, coal, petroleum, transportation, military industry, aerospace, etc., and has become an important cause of equipment failure or material damage. It not only causes equipment parts to fail, but also causes The workpieces are frequently replaced and repaired, the efficiency of the equipment is reduced, and a large amount of energy and materials are consumed. Wear and tear lost 1 / 3 of the world's primary energy, and 70% of the damage to electromechanical equipment was also caused ...

AI Technical Summary

Problems solved by technology

However, it is impossible to achieve an effective unification, especially in the application of outdoor mining, excavation and other construction machinery.

The wear resistance of high manganese steel is conditional, and its yield strength is low and easy to deform; low and medium alloy wear resistant steel has better strength and toughness, and its wear resistance under low and medium impact loads is better than that of high manganese steel , but there are problems of low hardenability and hardenability, and poor wear resistance; the structure of high-chromium cast iron contains more than 20% of high-hardness eutectic carbides, which has excellent wear resistance, but there are high content of alloying elements, High production cost and high temperature heat treatment are prone to deformation and cracking; ordinary white cast iron and low alloy white cast iron have low hardness, carbides are distributed continuously, and are brittle. They are easy to peel off or even crack during use.