Abrasion-resistant steel good in surface quality and preparation method thereof

A surface quality, wear-resistant steel technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems affecting surface quality, affecting equipment appearance, and affecting equipment surface paint

Active Publication Date: 2019-11-26
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, surface defects will become the crack source of various failure cracks; on the other hand, it will affect the appearance of equipment
Steel plate manufacturers adopt partial grinding to deal with surface def...

Method used

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  • Abrasion-resistant steel good in surface quality and preparation method thereof
  • Abrasion-resistant steel good in surface quality and preparation method thereof
  • Abrasion-resistant steel good in surface quality and preparation method thereof

Examples

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Embodiment Construction

[0046] Below in conjunction with embodiment the present invention is described in further detail.

[0047] Taking the steel plate as an example, the production process of the wear-resistant steel of the present invention is: converter steelmaking -> LF refining -> VD or RH high vacuum degassing -> continuous casting -> heating -> rolling -> shot blasting -> Quenching -> Tempering.

[0048] The present invention will be further described below in conjunction with Embodiment 1-2. The specific chemical composition of Embodiment 1-2 is shown in Table 1. Steel plate carbon equivalent CEV≤0.4, welding crack sensitivity coefficient PCM≤0.25, which can realize welding without preheating.

[0049] The production method of the low-alloy easy-to-weld wear-resistant steel plate with excellent surface quality in Example 1-2 of the present invention comprises the following steps:

[0050] (1) Smelting: Smelting with a 150-ton converter, the basicity of the final slag of the converter is ...

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PUM

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Abstract

The invention relates to abrasion-resistant steel good in surface quality. The abrasion-resistant steel comprises the components of 0.12-0.20% of C, 0-0.1% of Si, 0.6-1.20% of Mn, 0.010-0.040% of Nb,0-0.01% of V, 0.010-0.030% of Ti, 0-0.04% of Al, 0-0.1% of Ni, 0-0.1% of Cu, 0.10-0.40% of Cr, 0-0.1% of Mo, 0.001-0.005% of B, 0.0010-0.0050% of Ca, 0-0.010% of P, 0-0.0015% of S, 0-0.0012% of O, 0-0.0035% of N, 0-0.0002% of H and the balance Fe; and the carbon equivalent CEV is smaller than or equal to 0.4, and PCM is smaller than or equal to 0.25. The production technological process comprisesthe steps of converter steelmaking, LF refining, VD or RH high vacuum degassing, continuous casting, heating, rolling, shot blasting treatment, quenching and tempering. The abrasion-resistant steel has the better surface quality and is free of gas pits, inclusion, pockmarks, press-in scales and other surface defects. The depth of surface mottles caused by scale disengagement is smaller than or equal to 0.1 mm, and steel plate surface coping can be not conducted. Based on element design, preheating-free welding and excellent toughness can be further achieved.

Description

technical field [0001] The invention relates to the technical field of iron-based alloys, in particular to a wear-resistant steel with excellent surface quality and a manufacturing method thereof. Background technique [0002] Wear-resistant steel plates are widely used in construction machinery, mining and transportation, road transportation and other industries that require high strength and good wear resistance for key components of mechanical equipment, such as excavator buckets, scraper conveyor middle grooves, mining dump trucks bucket and so on. In recent years, domestic wear-resistant steel production enterprises have done a lot of work on how to improve the comprehensive mechanical properties of steel plates. For example, the inventions of Chinese patent publication numbers CN104451409A, CN103014543A, CN102747280B, and CN106521314B are based on surface hardness, overall hardness, high toughness, and easy welding. etc. have been reported. [0003] With the further ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/48C22C38/46C22C38/50C22C38/42C22C38/44C22C38/54C22C38/06C22C38/20C22C38/26C22C38/24C22C38/22C22C38/28C22C38/32C21D8/02
CPCC22C38/02C22C38/04C22C38/48C22C38/46C22C38/50C22C38/42C22C38/44C22C38/54C22C38/06C22C38/002C22C38/20C22C38/26C22C38/24C22C38/22C22C38/28C22C38/32C21D8/0205C21D8/0247C21D8/0226C21D9/46C21D8/021C21D8/0263C21D7/06C21D1/18C21D1/26C22B9/04C22B9/18C22C38/001B22D11/117
Inventor 刘俊杨洋许晓红武金明苗丕峰徐国庆王小双
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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