A kind of low temperature resistant corrosion resistant alloy steel material and preparation method thereof

Abstract

The invention relates to a low-temperature-resistant corrosion-resistant alloy steel material which contains the following chemical components in percentage by mass: 0.2-0.4% of carbon, 0.2-0.4% of silicon, 0.2-0.4% of manganese, 3.3-2.5% of chromium, 0.7-0.9% of titanium, 1.2-1.5% of aluminum, 4.6-5.1% of cobalt, 0.006-0.009% of niobium, 0.04-0.07% of W, 21.0-22.5% of Ni, 0.07-0.09% of V, at most 0.030% of P, at most 0.030% of S and the balance of iron. By using the raw material combination of the titanium and the like, the proportion, production technique and feed sequence are reasonably arranged, so that the formed alloy material has favorable comprehensive mechanical properties and especially has the characteristics of low cold brittleness. The alloy material is suitable to be used in various environments, and is especially suitable for ultralow-temperature-resistant environments. The refining agent is added to lower the porosity by 1-2 degrees.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a low-temperature-resistant and corrosion-resistant alloy steel material and a preparation method thereof. Background technique [0002] 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 school Low-carbon alloy steel, etc., so far, although alloy steel technology has been greatly developed, there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, Costs cannot be taken into account. In many cases, the production requirements cannot be met, and further improvements are needed to improve production efficiency, reduce costs, improve safety, provide guarantee fo...

AI Technical Summary

Problems solved by technology

[0002] 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 school Low-carbon alloy steel, etc., so far, although alloy steel technology has been greatly developed, there are still many problems, such as wear resistance, hardness, rust resistance, corrosion resistance, high and low temperature resistance, brittleness, toughness, Costs cannot be taken into account. In many cases, the production requirements cannot be met, and further improvements are needed to improve production efficiency, reduce costs, improve safety, provide guarantee for the development of high-tech, and provide impetus for social development. There are still many tasks to be done. difficult