High-wear resistance steel plate and manufacturing method thereof

A technology of high wear resistance and manufacturing method, which is applied in the field of high wear resistance steel plate and high wear resistance steel plate manufacturing, which can solve the problems of poor processing performance of steel materials and increased cracking tendency of wear-resistant parts.

Inactive Publication Date: 2018-09-18
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional low-alloy martensitic steel improves the wear resistance by simply increasing the hardness, which leads to poor processing performance of the steel and a significant increase in the cracking tendency of wear-resistant parts

Method used

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  • High-wear resistance steel plate and manufacturing method thereof
  • High-wear resistance steel plate and manufacturing method thereof
  • High-wear resistance steel plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the high wear resistance steel plate of the embodiment of the present invention, its chemical composition includes: C: 0.15-0.17%, Si: 0.15-0.30%, Mn: 1.10-1.40%, P: ≤0.012%, in weight percentage, S: ≤0.002%, Cr: 0.40~0.90%, Ti: 0.008~0.018%, B: 0.0010~0.0020%, Mo: 0.15~0.40%, Ni: 0.10~0.30%, Ce: ≤0.0030%, Als: 0.025 ~0.04%, CEV: 0.48~0.64%.

[0026] Preferably, in terms of weight percentage, its chemical composition includes: C: 0.15-0.17%, Si: 0.20-0.30%, Mn: 1.20-1.30%, P: 0.008-0.012%, S: ≤0.002%, Cr: 0.40 ~0.80%, Ti: 0.012~0.014%, B: 0.0015~0.0020%, Mo: 0.18~0.40%, Ni: 0.14~0.16%, Ce: ≤0.0015%, Als: 0.030~0.033%, CEV: 0.48~0.64 %.

[0027] The alloy composition of the high wear resistance steel plate in this embodiment is mainly low carbon and low alloy, making full use of rare earth to improve the dendrite segregation, microstructure, grain size, weldability, formability, and high wear resistance of the slab. The addition of rare earth is beneficia...

Embodiment 2

[0030] According to the manufacturing method of the high wear resistance steel plate of the embodiment of the present invention, its chemical composition is shown in Table 1 in terms of weight percentage, wherein Comparative Example 1 is a steel plate with a hardness of 400HB, including:

[0031] (1) Smelting

[0032] The molten iron for smelting is pretreated by desulfurization, adding scrap steel, heating by LF refining, adding Cr and Mo to adjust to the target composition, alloying, refining off-site temperature 1600 ℃, RH vacuum treatment, vacuum treatment time 20min, adding rare earth content during vacuum treatment It is a 10% Ce-Fe alloy. By adding this alloy, the yield of rare earth can reach more than 50%. Before adding the Ce-Fe alloy, measure the temperature and determine the oxygen. The content of active oxygen is required to be less than 5ppm, and the temperature is 1580°C. It is to improve the yield of rare earth and control the inclusions in steel. After the va...

Embodiment 3

[0040]According to the manufacturing method of the high wear resistance steel plate of the embodiment of the present invention, its chemical composition is shown in Table 1 by weight percentage, including:

[0041] (1) Smelting

[0042] The molten iron for smelting is pretreated by desulfurization, adding scrap steel, heating by LF refining, adding Cr and Mo to adjust to the target composition, alloying, refining off-site temperature 1600 ℃, RH vacuum treatment, vacuum treatment time 20min, adding rare earth content during vacuum treatment It is a 10% Ce-Fe alloy. By adding this alloy, the yield of rare earth can reach more than 50%. Before adding the Ce-Fe alloy, measure the temperature and determine the oxygen. The content of active oxygen is required to be less than 5ppm, and the temperature is 1580°C. It is to improve the yield of rare earth and control the inclusions in steel. After the vacuum treatment, perform soft blowing. During the soft blowing period, the slag surf...

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Abstract

The invention provides a high-wear resistance steel plate and a manufacturing method thereof. The high-wear resistance steel plate comprises, by weight, 0.15-0.17% of C, 0.15-0.30% of Si, 1.10-1.40% of Mn, 0.012% or less of P, 0.002% or less of S, 0.40-0.90% of Cr, 0.008-0.018% of Ti, 0.0010-0.0020% of B, 0.15-0.40% of Mo, 0.10-0.30% of Ni, 0.0030% or less of Ce, 0.025-0.04% of Als, and 0.48-0.64%of CEV. The austenite stability is improved, and the hardenability of the steel plate is improved, so the anisotropy of the steel plate is reduced, the bending forming property is improved, the welding cracking tendency is reduced, and the wear resistance of the core part of the steel plate is improved, and the weldability of wear resistant rare earth steel is improved under the condition that the hardness of heavy-gauge wear resistant steel is not less than 90% of the surface hardness.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a high wear resistance steel plate and a manufacturing method of the high wear resistance steel plate. Background technique [0002] Coal is the main energy source in my country, and high-performance wear-resistant steel is the key basic material to support the safe and efficient operation of coal mining and transportation equipment. With the continuous increase of high-yield and high-efficiency working faces with an annual output of over 10 million tons in large mines in my country, it is urgent to develop new high-wear-resistant steel plate materials to meet the urgent needs of the coal industry. [0003] Low-alloy martensitic wear-resistant steel is the most widely used wear-resistant steel in my country's coal machinery industry. Compared with medium-high manganese austenitic wear-resistant steel and bainite wear-resistant steel, it has simple production process, low cost ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/50C22C38/54C22C38/44C22C38/06C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C22C38/005C22C38/02C22C38/04C22C38/06C22C38/44C22C38/50C22C38/54Y02P10/20
Inventor 袁晓鸣王雪莲屈文胜高军温利军吴鹏飞乔建军康韶光任丽芳
Owner BAOTOU IRON & STEEL GRP
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