Alloy steel material with high fracture toughness for rolls and preparation method thereof

A high-fracture, alloy steel technology, applied in the field of high-fracture-toughness alloy steel materials for rolls and its preparation, can solve harsh and demanding problems, achieve high contact fatigue strength, improve comprehensive mechanical properties, and high hardness.

Inactive Publication Date: 2014-04-23
马鞍山市方圆材料工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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Embodiment Construction

[0013] A high-fracture-toughness alloy steel material for rolls, which contains chemical element components and mass percentages: carbon 0.8-0.9, tungsten 0.5-0.8, molybdenum 1.0-1.2, vanadium 1.2-1.5, chromium 2.7-3.2, niobium 0.05 -0.10, gadolinium 0.05-0.1, manganese 2.6-2.8, nickel 0.3-0.5, P≤0.030, S≤0.030, and the balance is iron.

[0014] The production method of the high fracture toughness alloy steel material for the roll is as follows:

[0015] (1) Prepare pig iron and scrap iron as the source of iron matrix in a ratio of 1:1.5, put pig iron into the furnace for melting, perform desulfurization, deoxidation, use refining agent for one-time refining, add alloy components for alloying, and then add scrap iron to melt , adding refining agent for secondary refining, testing and adjusting the content of chemical elements to pass, casting, post-casting heat treatment, etc.;

[0016] (2) The order of batches of alloying elements put into the furnace during the alloying pro...

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PUM

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Abstract

The invention discloses an alloy steel material with high fracture toughness for rolls. The alloy steel material comprises the following chemical elements in percentage by mass: 0.8-0.9% of carbon, 0.5-0.8% of tungsten, 1.0-1.2% of molybdenum, 1.2-1.5% of vanadium, 2.7-3.2% of chromium, 0.05-0.10% of niobium, 0.05-0.1% of gadolinium, 2.6-2.8% of manganese, 0.3-0.5% of nickel, not more than 0.030% of P, not more than 0.030% of S and the balance of ferrum.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a high fracture toughness 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 fracture to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/04C21D6/00
CPCY02P10/20
Inventor 何玉平陶国斌史承海晏绍斌屠明安
Owner 马鞍山市方圆材料工程股份有限公司
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