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Low-cost HB400-grade wear-resisting steel and production method thereof

A production method and low-cost technology, which are applied to low-cost HB400 grade wear-resistant steel and its production field, can solve the problems of high strength and poor plasticity of martensitic wear-resistant steel, improve strength and wear resistance, and improve strength and plasticity, to solve the effect of high strength and poor plasticity

Active Publication Date: 2015-03-25
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of high strength and poor plasticity of martensitic wear-resistant steel, and provide a HB400 grade wear-resistant steel with low manufacturing cost, simple process and excellent comprehensive performance

Method used

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  • Low-cost HB400-grade wear-resisting steel and production method thereof
  • Low-cost HB400-grade wear-resisting steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A low-cost manufacturing HB400 grade high-plastic high-strength wear-resistant steel and its processing method, its components and weight percentage content: C: 0.08%, Si: 0.20%, Mn: 1.60%, P: ≤ 0.015%, S: ≤0.015%, Cr: 0.65%, Nb: 0.02%, Ti: 0.005%, B: 0.001%, Als: 0.010%, the rest is Fe and trace impurity elements, CEV=C+Mn / 6+(V+Mo+ Cr) / 5+(Ni+Cu) / 15≤0.55.

[0048] Low manufacturing cost HB400 grade high plasticity high strength wear-resistant steel and its processing method, its steps:

[0049] 1) Smelting and continuous casting into billets;

[0050] 2) Heating the billet, the heating temperature is controlled at 1180-1240°C;

[0051] 3) Rolling process: the first stage rolling temperature is 1105°C, the first stage cumulative reduction rate is 68%, the second stage rolling temperature is 1020°C, the pass reduction rate is ≥15%, and the final rolling temperature is 920°C;

[0052] 4) On-line sub-temperature quenching, the starting cooling temperature is 765°C, the c...

Embodiment 2

[0056] A low-cost manufacturing HB400 high-plastic high-strength wear-resistant steel and its processing method, its components and weight percentage content: C: 0.09%, Si: 0.28%, Mn: 1.56%, P: ≤ 0.015%, S: ≤0.015%, Cr: 0.55%, Nb: 0.03%, Ti: 0.009%, B: 0.002%, Als: 0.018%, the rest is Fe and trace impurity elements, CEV=C+Mn / 6+(V+Mo+ Cr) / 5+(Ni+Cu) / 15≤0.55.

[0057] Low manufacturing cost HB400 grade high plasticity high strength wear-resistant steel and its processing method, its steps:

[0058] 1) Smelting and continuous casting into billets;

[0059] 2) Heating the billet, the heating temperature is controlled at 1180-1240°C;

[0060] 3) Rolling process: the first stage rolling temperature is 1119°C, the first stage cumulative reduction rate is 56%, the second stage rolling temperature is 1035°C, the pass reduction rate is ≥15%, and the final rolling temperature is 910°C;

[0061] 4) Sub-temperature quenching is carried out online, the starting cooling temperature is 710°...

Embodiment 3

[0065] A low-cost manufacturing HB400 grade high-plastic high-strength wear-resistant steel and its processing method, its components and weight percentage content: C: 0.13%, Si: 0.29%, Mn: 1.53%, P: ≤ 0.015%, S: ≤0.015%, Cr: 0.53%, Nb: 0.04%, Ti: 0.012%, B: 0.003%, Als: 0.028%, the rest is Fe and trace impurity elements, CEV=C+Mn / 6+(V+Mo+ Cr) / 5+(Ni+Cu) / 15≤0.55.

[0066] Low manufacturing cost HB400 grade high plasticity high strength wear-resistant steel and its processing method, its steps:

[0067] 1) Smelting and continuous casting into billets;

[0068] 2) Heating the billet, the heating temperature is controlled at 1180-1240°C;

[0069] 3) Rolling process: the first stage rolling temperature is 1135°C, the first stage cumulative reduction rate is 62%, the second stage rolling temperature is 1033°C, the pass reduction rate is ≥15%, and the final rolling temperature is 925°C;

[0070] 4) On-line sub-temperature quenching, the starting cooling temperature is 680°C, the c...

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Abstract

The invention discloses low-cost HB400-grade wear-resisting steel and a production method thereof. The low-cost HB400-grade wear-resisting steel comprises the following chemical components in percentage by weight: 0.08-0.19 percent of C, 0.20-0.50 percent of Si, 1.30-1.60 percent of Mn, smaller than or equal to 0.015 percent of P, smaller than or equal to 0.015 percent of S, 0.30-0.65 percent of Cr, 0.02-0.05 percent of Nb, 0.005-0.025 percent of Ti, 0.001-0.005 percent of B, 0.010-0.040 percent of Als and the balance of Fe and a trace amount of impurity elements. According to a steel plate, the thickness specification range is 10mm to 50mm; Rm is larger than or equal to 1300MPa; the percentage elongation is larger than or equal to 15%; the Akv is larger than or equal to 47J at -20 DEG C; the HBW / 10 / 3000 is larger than or equal to 400. The low-cost HB400-grade wear-resisting steel has the advantages that the manufacturing cost is greatly lowered, the problems of high strength and poor plasticity of wear-resisting martensite steel are solved, and the steel plate can be delivered directly. Therefore, the low-cost HB400-grade wear-resisting steel has quite high market competitiveness, wide application prospect and obvious economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of manufacturing wear-resistant steel for mechanical engineering, and in particular relates to a low-cost HB400 wear-resistant steel and a production method thereof. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products such as engineering, mining, construction, 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 various mining machinery, grab buckets, stackers and reclaimers, feeding bending structures, etc. A major problem that has plagued people in the industry for many years is wear and tear, especially structures that contact rocks, mineral materials, etc. that are subject to friction, impact, and erosion. According to statistics, in industrially developed countries, the economic loss caused by the wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/32C22C33/04C21D8/00
CPCC21D8/00C22C33/04C22C38/02C22C38/26C22C38/28C22C38/32C22C38/38
Inventor 李德发王世森董汉雄余宏伟卜勇熊涛张云燕陆在学洪君
Owner WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
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