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Low-alloy high-performance wear-resistant steel plate and manufacturing method thereof

A manufacturing method and low-alloy technology, applied in the field of wear-resistant steel, can solve the problems of poor welding performance and machining performance, poor welding and machining performance, unsuitable for wide application, etc., and achieve excellent welding performance, mechanical properties and welding performance. The effect of excellent performance and good impact toughness

Active Publication Date: 2013-07-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production of wear-resistant steel by casting has short production process, simple process and easy production, but there are disadvantages such as high alloy element content, poor mechanical, welding and machining performance; production of wear-resistant steel by rolling can further reduce alloy elements content, improve product performance, but still not suitable for wide application; off-line quenching + tempering heat treatment is the most important production method of wear-resistant steel plate at present, its alloy elements are less, product performance is high, and can stabilize industrial production, but with low Carbon, energy saving, environmental protection and other requirements are getting higher and higher, and low-cost, short-process, high-performance products are the inevitable trend of the development of the steel industry
[0005] Chinese patent CN1140205A discloses a medium-high-carbon medium-alloy wear-resistant steel, which is produced by casting process, and its carbon and alloy elements (Cr, Mo, etc.) are high in content, which will inevitably lead to poor welding performance and machining performance
[0006] Chinese patent CN1865481A discloses a bainitic wear-resistant steel with high carbon and alloy elements (Si, Mn, Cr, Mo, etc.) content and poor welding performance; Tensitic wear-resistant steel, low mechanical properties

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Embodiment Construction

[0041] The technical solution of the present invention will be further elaborated below in conjunction with specific examples. It should be clear that these examples are only used to describe the specific implementation of the present invention, and are not intended to constitute any limitation on the protection scope of the present invention.

[0042] The following examples 1-10 of the wear-resistant steel plate and the steel plate of comparative example 1, the weight percent of its chemical composition is as shown in table 1; The manufacturing method of the steel plate of the embodiment is as follows: the corresponding smelting raw materials are carried out in sequence according to the following steps: smeltingcasting→heating→rolling→directly cooling after rolling→tempering (tempering is optional), control the various embodiments and comparative examples The mass percentage distribution of chemical elements in the steel plate in 1, wherein, in the heating step, the slab heat...

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Abstract

The present invention provides a low-alloy high-performance wear-resistant steel plate and a manufacturing method thereof. The steel plate comprises the following chemical compositions (wt%) of 0.21-0.32% of C, 0.10-0.50% of Si, 0.60-1.60% of Mn, 0.0005-0.0040% of B, 0-1.50% of Cr, 0-0.80% of Mo, 0-1.50% of Ni, 0-0.080% of Nb, 0-0.080% of V, 0-0.060% of Ti, 0.010-0.080% of Al, 0.0010-0.0080% of Ca, 0-0.0080% of N, 0-0.0080% of O, 0-0.0004% of H, 0-0.015% of P, and 0-0.010% of S, wherein the following relationships are satisfied: 0.20%<=(Cr / 5+Mn / 6+50B)<=0.55%, 0.02%<=(Mo / 3+Ni / 5+2Nb)<=0.45%, 0.01%<=(Al+Ti)<=0.13%, and the balance is Fe and inevitable impurities. The low-alloy high-performance wear-resistant steel plate manufactured by the above compositions and through a TMCP process has high strength and hardness, good toughness and excellent wear resistance, and is suitable for easy-to-wear parts in various mechanical equipments.

Description

technical field [0001] The invention relates to wear-resistant steel, in particular to a low-alloy high-performance wear-resistant steel plate and its manufacturing method. Typical mechanical properties: tensile strength greater than 1400MPa, elongation greater than 11%, Brinell hardness greater than 450HB, -40 ℃ Charpy V-type longitudinal impact energy greater than 50J. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products such as engineering, mining, agriculture, cement production, ports, electric power and metallurgy that require high strength and high wear resistance due to extremely harsh working conditions. Such as bulldozers, loaders, excavators, dump trucks and grabs, stackers and reclaimers, feeding bending structures, etc. [0003] Traditionally, austenitic high manganese steel is generally used to produce wear-resistant parts. Austenitic high-manganese steel can undergo strain-induced martensitic transformation under la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/54C22C38/58C22C33/04C21D8/02
CPCC22C38/04C22C38/001C22C38/002C22C38/02C22C38/06C22C38/12C22C38/14C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32C22C38/44C22C38/46C22C38/48C22C38/50C21D9/46C21D2211/001C21D2211/008C22C38/54C21D1/60C21D6/001C21D6/002C21D6/004C21D6/005C21D6/008C21D8/0263C22C38/58C22C38/08
Inventor 李红斌姚连登王笑波
Owner BAOSHAN IRON & STEEL CO LTD
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