Abrasion-resistant alloy cast iron

Abstract

The invention discloses abrasion-resistant alloy cast iron, comprising the following components in percentage by weight: 3.1-3.5% of carbon, 1.9-2.5% of silicon, 0.4-0.9% of copper, 0.4-0.6% of manganese, 0.2-0.4% of chromium, 0.1-0.4% of molybdenum, 0.1-0.15% of sulphur, 0.1-0.15% of phosphorus, 0.05-0.2% of vanadium, 0.04-0.07% of boron, and the balance of iron and impurities. Different numbers of cast iron of boron-containing cementite or ledebrite structures in a metallographic structure can be obtained. The micro-hardness of the boron-containing cementite is HV960-1280. The alloy cast iron disclosed by the invention has a special abrasion-resistant structure and the abrasion resistance is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and specifically refers to an alloy cast iron. Background technique [0002] Alloy cast iron is obtained by adding appropriate amount of alloying elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.) to ordinary cast iron. Alloying elements change the matrix structure of cast iron, so that it has corresponding properties such as heat resistance, wear resistance, corrosion resistance, low temperature resistance or non-magnetic properties. Among them, gray cast iron in alloy cast iron is the most widely used cast iron in the industry due to its low cost, castability and machinability, such as widely used in the manufacture of parts such as engines and home appliances. The composition of the existing gray cast iron is determined by the performance requirements of the parts it manufactures, such as tensile strength, wear perf...

AI Technical Summary

Problems solved by technology

However, when gray cast iron is used to make components that require high wear resistance, it is difficult to meet the wear resistance requirements