Impact-resistant alloy cast steel and preparation method thereof

Abstract

The invention discloses impact-resistant alloy cast steel and a preparation method thereof. The impact-resistant alloy cast steel is composed of, by weight, 0.08%-0.28% of carbon, 1.6%-2.0% of silicon, 0.25%-0.75% of manganese, 1.5%-1.85% of copper, 2.1%-2.5% of chromium, 2.1%-2.4% of molybdenum, 0.09%-0.12% of bismuth, 0.3%-0.6% of titanium, 0.25%-0.40% of vanadium, 0.03%-0.04% of rare earth, 0.10%-0.20% of magnesium, 0.10%-0.17% of boron, 0-0.03% of inevitable impurities and the balance iron. Compared with the prior art, the alloy cast steel formed through the reasonable ratio, the reasonable production process and the reasonable feeding sequence has the good comprehensive mechanical property, especially high impact resistance, the service life of the alloy cast steel can be obviously prolonged, the fault rate of machines is lowered, and the safety coefficient is improved; meanwhile, a refining agent is used for casting production of the alloy cast steel, so that the rate of finished products is obviously increased.

Description

technical field [0001] The invention relates to the technical field of cast steel, in particular to an impact-resistant alloy cast steel and a preparation method thereof. Background technique [0002] Cast steel is a general term for iron-based alloys used to produce castings that do not undergo eutectic transformation during solidification, and is a type of casting alloy. Cast steel is an alloy with iron and carbon as the main elements, and the carbon content is 0-2%. So far, cast steel is divided into three categories: cast carbon steel, cast low alloy steel and cast special steel. [0003] The development of alloy steel has a history of more than 100 years. So far, a variety of alloy steels have been applied in industry, mainly including the following types: quenched and tempered steel, spring steel, tool steel, high-speed steel, die steel , high, medium and low carbon alloy steel, etc. So far, although the alloy steel technology has been greatly developed, there are st...

AI Technical Summary

Problems solved by technology

[0003] The development of alloy steel has a history of more than 100 years. So far, a variety of alloy steels have been applied in industry, mainly including the following types: quenched and tempered steel, spring steel, tool steel, high-speed steel, die steel , high, medium and low carbon alloy steel, etc. So far, although the alloy steel technology has been greatly developed, there are still problems with impact strength, wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, and brittleness. , toughness, cost, etc. cannot be taken into account. In many cases, it cannot meet the production requirements, and further improvement is needed to improve production efficiency, reduce costs, improve safety, provide guarantee for the development of high-precision technology, and provide power for social development. the task is still arduous