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High hardness and toughness low alloy abrasion resistant steel and use thereof

A low-alloy, wear-resistant steel technology, applied in the field of high-hardness and toughness low-alloy wear-resistant steel, wear-resistant steel, can solve the problem of insufficient hardenability of steel parts, achieve high initial hardness, high degree of work hardening, and wide application range wide effect

Active Publication Date: 2009-08-05
韶关韶瑞铸钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the hardness, impact toughness and wear resistance of steel need to be improved, and the hardenability of thicker and large steel parts is somewhat insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The low-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratios: carbon 0.25%, silicon 0.55%, manganese 0.3%, chromium 2.5%, molybdenum 0.4%, nickel 0.1%, niobium 0.07%, boron 0.005%, Rare earth elements are 0.3%, phosphorus is 0.031%, sulfur is 0.04%, and the balance is iron. Put pig iron, scrap steel, pure metal nickel and various iron alloys into electric furnace for smelting. Boron alloy and rare earth alloy are used for inoculation and modification of molten steel in a ladle. After casting, the cast parts are heated to 1010℃ for 2 hours. , Water quenching heat treatment and tempering treatment at 280℃ for 2 hours, the hardness is 47~48HRC, the V-notch impact toughness is 31~35J / cm 2 .

[0021] It is the same as the low-alloy wear-resistant steel that does not contain niobium, boron and rare earth elements (prepared and processed according to the method of this embodiment, only does not contain niobium, boron and rare eart...

Embodiment 2

[0023] The low-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratios: carbon 0.30%, silicon 2.0%, manganese 0.7%, chromium 1.2%, molybdenum 1.0%, nickel 0.45%, titanium 0.2%, niobium 0.12%, Boron is 0.007%, rare earth element is 0.1%, phosphorus is 0.032%, sulfur is 0.035%, and the balance is iron. Put pig iron, scrap steel, pure metal nickel and various iron alloys into electric furnace for smelting. Boron alloy and rare-earth alloy are used for inoculation and modification of molten steel in the ladle. After casting, the cast parts are heated to 920℃ for 4 hours. , Water quenching heat treatment and tempering treatment at 280℃ for 2 hours, the hardness is 49~50HRC, the V-notch impact toughness is 28~32J / cm 2 .

[0024] It is the same as the low-alloy wear-resistant steel that does not contain niobium, boron and rare earth elements (prepared and treated according to the method of this embodiment, only contains no niobium, boron an...

Embodiment 3

[0026] The low-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratios: carbon 0.35%, silicon 0.95%, manganese 2.0%, chromium 0.5%, molybdenum 0.6%, nickel 0.25%, tungsten 1.0%, copper 0.1%, Niobium 0.01%, boron 0.0005%, rare earth element 0.05%, titanium 0.01%, zirconium 0.2%, vanadium 0.01%, aluminum 0.05%, phosphorus 0.029%, sulfur 0.026%, and the balance is iron. Pig iron, scrap steel, pure metal nickel, copper and various iron alloys are smelted in an electric furnace. Boron alloy and rare-earth alloy are used for inoculation and modification of molten steel in a ladle. After casting, the cast parts are heated to 980℃ for heat preservation 4 hours, water quenching heat treatment and heat preservation at 280℃ for 4 hours for tempering treatment, hardness is 51~52HRC, V-notch impact toughness is 26~30J / cm 2 .

[0027] It is the same as the low-alloy wear-resistant steel that does not contain niobium, boron and rare earth elements ...

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Abstract

The invention discloses high-hardness-ductility low alloy abrasion-resistant steel with high hardness, good ductility, high work hardening capacity, favorable comprehensive mechanical property and hardenability. In the invention, as Nb, B and rear-earth elements are added, the high-hardness-ductility low alloy abrasion-resistant steel can be ensured to have better hardenability, better ductility, high initial hardness, high work hardening capacity and better abrasion-resistant performance, thereby enlarging the application of materials. The invention is suitable for preparing wearing parts, in particular to parts used for impacting wearing working conditions.

Description

Technical field [0001] The invention relates to a wear-resistant steel, in particular to a high-hardness, toughness, low-alloy wear-resistant steel with high hardness, good toughness, high degree of work hardening, good comprehensive mechanical properties and hardenability, and its application, belonging to metal wear-resistant steel Material technology field. Background technique [0002] At present, multi-element low-alloy wear-resistant steels are commonly used in metallurgy, electric power, building materials, construction, coal, chemical and other industries under impact load and wear conditions. [0003] Low-alloy wear-resistant steel can be cooled and quenched in water to obtain a martensite matrix-based microstructure, which has certain hardness, impact toughness and wear resistance, and is not easy to deform and break during use. [0004] The representative of low-alloy wear-resistant steel is cast 30CrMnSiMo steel. The V-notch impact toughness of 30CrMnSiMo steel is abo...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/34C22C38/38C22C38/54C22C38/58
Inventor 李卫刘英
Owner 韶关韶瑞铸钢有限公司
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