A kind of high boron alloy steel material for roll and preparation method thereof

Abstract

The invention relates to a high-boron alloy steel material for a roller. The high-boron alloy steel material contains the following chemical elements in percentage by weight: 0.8-0.9% of carbon, 2.5-3% of tungsten, 0.15-0.25% of molybdenum, 0.5-0.8% of vanadium, 2.1-2.4% of chromium, 0.05-0.10% of niobium, 0.06-0.10% of cerium, 0.02-0.05% of praseodymium, 0.3-0.5% of titanium, 0.1-0.15 of cobalt, 0.3-0.5% of nickel, 0.5-0.8% of B, not more than 0.030% of P, not more than 0.030% of S and the balance of iron. The alloy steel provided by the invention has high hardness and wear resistance, as well as relatively good toughness, high heat intensity and high contact fatigue strength, and can also be used for developing a composite steel roller with high content of W and V, light segregation and good wear resistance, so as to meet the requirements of a hot continuous rolling technology, reduce the roller changing frequency in rolling, greatly improve the operation rate of a rolling machine, reduce the production cost and improve economic benefits.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a high-boron alloy steel material for rolls and a preparation method thereof. Background technique [0002] The working environment of pump valves is diverse and harsh, and the requirements for materials are very high. At present, there are many kinds of alloy steel used in pump valves, and the technology has made great progress, but there are still many problems, such as wear resistance, hardness, rust resistance Performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., cannot meet the production requirements in many occasions, and further improvement is needed to improve production efficiency, reduce costs, and improve safety. Guaranteeing and providing impetus for social development are still arduous tasks. Contents of the invention [0003] The object of the present invention is to provide a high boron alloy steel materi...

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Problems solved by technology

[0002]Pumps and valves work in various and harsh environments, and have high requirements for materials. At present, there are many kinds of alloy steels used for pumps and valves, and the technology has made great progress, but There are still many problems, such as wear resistance, hardness, antirust performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., which cannot meet the production requirements in many occasions, and further improvement is needed to increase production efficiency. , reduce costs, improve safety, provide guarantee for the development of high-precision technology, and provide impetus for social development, the task is still very arduous