Chromium manganese tungsten molybdenum high alloy steel and manufacturing method

Abstract

The invention discloses chromium manganese tungsten molybdenum high alloy steel and a manufacturing method thereof. The chromium manganese tungsten molybdenum high alloy steel comprises the followingcomponents in percentage by weight: 2-4% of carbon, 24-28% of chromium, 1-3% of silicon, 0.01-0.03% of phosphorus, 1.0-1.2% of manganese, 0.2-0.4% of nickel, 0.2-0.3% of tungsten, 0.1-0.3% of molybdenum, 0.1-0.3% of aluminum, 0.05-0.1% of tin, 0.05-0.06% of titanium, 0.1-0.15% of vanadium, 0.0005-0.0008% of antimony, and the balance of iron and impurities. The chromium manganese tungsten molybdenum high alloy steel has strict demands on the matching precision of all elements, so that the out-of-round rate and the breakage rate in the operation process are low; the preparation method is simplein process; a chilling process for aerospace science and technology is adopted in casting, so that grains of cast balls are finer, the structure is more compact, the wear resistance is improved, the electric energy loss is effectively reduced, and the effects of energy conservation and consumption reduction are achieved; after annealing, the alloy steel can eliminate the quenching stress; and remained austenite is converted to bainite to increase the hardness, so that the wear resistance, the hardness and the toughness of the alloy steel are guaranteed.

Description

technical field [0001] The invention relates to an alloy steel material, in particular to a chromium-manganese-tungsten-molybdenum high-alloy steel and a manufacturing method thereof. Background technique [0002] Alloy steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements to ordinary carbon steel. According to the different elements added and appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained. According to the content of alloy elements in steel, it can be divided into low alloy steel, medium alloy steel and high alloy steel. The main alloying elements of alloy steel are silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth and so on. In the production of tra...

AI Technical Summary

Problems solved by technology

[0003] However, due to the lack of hardenability and toughness of a single chromium alloyed steel, the steel core has poor wear resistance or early fracture; in addition, the current high-chromium steel on the market is produced by traditional production processes, which is prone to failure in the production process. Or the phenomenon of cracking during use. The reason for this phenomenon is largely related to the heat treatment process. As far as heat treatment is concerned, single-medium quenching is mostly used in China at this stage, which affects the toughness and wear resistance of the product to a certain extent.