Malleable wear-resistant alloy cast iron

Abstract

The invention discloses malleable wear-resistant alloy cast iron. The malleable wear-resistant alloy cast iron comprises the following components by weight percent: 2.4-2.8% of carbon, 1.1-1.5% of silicon, 0.4-0.6% of manganese, 0.15-0.2% of sulfur, 0.8-0.1% of phosphorus, 0.05-0.2% of vanadium, 0.04-0.07% boron and the balance of iron and impurities. The malleable wear-resistant alloy cast iron has both forging machinability and wear resistance. Different amounts of boron-containing cementite or ledeburite in the metallographic structure is formed in the cast iron, wherein the micro-hardness of the boron-containing cementite is HV960-1280. The malleable wear-resistant alloy cast iron has a special wear-resistant structure, thus the wear resistance is extremely increased. In addition, after the cast iron is annealed, the forging machinability becomes good.

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

Moreover, due to the poor forging performance of gray iron castings, it is not suitable for forging