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An extra-thick and high-hardenability HB500 wear-resistant steel plate and its manufacturing method

A high-hardenability, wear-resistant steel plate technology, applied in the field of high-strength wear-resistant steel plate preparation, can solve the problems of unfavorable equipment durability, long-term use, neglect of steel plate uniformity, and short mechanical service life, and achieve good low-temperature impact toughness, The effect of excellent hardenability and guaranteed performance uniformity

Active Publication Date: 2020-07-28
贝斯山钢(山东)钢板有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Based on the above patent application documents, it can be seen that the research on wear-resistant steel plates in the prior art mainly focuses on the hardness of the steel plate, while ignoring the uniformity of the performance of the steel plate, which is not conducive to equipment (such as coal mine machinery, construction machinery, port machinery, etc.) The long-term and long-term use of the machine will cause defects such as short service life of the machine and hidden safety hazards.

Method used

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  • An extra-thick and high-hardenability HB500 wear-resistant steel plate and its manufacturing method
  • An extra-thick and high-hardenability HB500 wear-resistant steel plate and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] An extra-thick and high-hardenability HB500 wear-resistant steel plate. The thickness of the steel plate is 60 mm. The components contained in the steel plate and their weight percentages are as follows: C: 0.30%, Si: 0.26%, Mn: 0.85%, P: 0.008%, S: 0.003%, Alt: 0.035%, Ni: 0.22%, Cr: 0.85, Mo: 0.28%, Ti: 0.018%, N: 0.0030%, H: 0.00011%, and the rest are Fe and trace impurities.

[0046] The above-mentioned extra-thick and high-hardenability HB500 wear-resistant steel plate with a thickness of 60mm is manufactured as follows:

[0047] (1) Smelting: The cross-sectional size of molten iron is 300× after KR pretreatment, 120-ton top-bottom combined blowing converter smelting, 120-ton LF ladle furnace refining, 120-ton RH vacuum degassing refining, and slab continuous casting machine. 1800mm continuous casting slab;

[0048] (2) Slow cooling of continuous casting slabs: After the continuous casting slabs come off the assembly line, they are slowly cooled in the heat preser...

Embodiment 2

[0055] An extra-thick and high-hardenability HB500 wear-resistant steel plate. The thickness of the steel plate is 70mm. The components contained in the steel plate and their weight percentages are as follows: C: 0.31%, Si: 0.24%, Mn: 0.77%, P: 0.006%, S: 0.003%, Alt: 0.037%, Ni: 0.23%, Cr: 0.92, Mo: 0.26%, Ti: 0.019%, N: 0.0033%, H: 0.00014%, and the rest are Fe and trace impurities.

[0056] The production and preparation process of the extra-thick and high-hardenability HB500 wear-resistant steel plate in this example and the thickness of the continuous casting slab are the same as in Example 1, the difference is that:

[0057] The thickness of the steel plate is 70mm; in step (4), the starting rolling temperature of the austenite non-recrystallized zone is 980°C, and the starting rolling thickness of the austenite non-recrystallized zone is 160mm; the off-line quenching in step (5) The heat treatment process is as follows: the steel plate is heated to 905°C for 140 minutes...

Embodiment 3

[0060] An extra-thick and high-hardenability HB500 wear-resistant steel plate. The thickness of the steel plate is 80 mm. The components contained in the steel plate and their weight percentages are as follows: C: 0.29%, Si: 0.26%, Mn: 0.79%, P: 0.005%, S: 0.003%, Alt: 0.031%, Ni: 0.26%, Cr: 0.84, Mo: 0.24%, Ti: 0.023%, N: 0.0023%, H: 0.00011%, and the rest are Fe and trace impurities.

[0061] The production and preparation process of the high-hardenability HB500 wear-resistant steel plate of this embodiment and the thickness of the continuous casting slab are the same as those of Embodiment 1, the difference is that:

[0062] The thickness of the steel plate is 80 mm; in step (4), the starting rolling temperature of the austenite non-recrystallized zone is 990 ° C, and the starting rolling thickness of the austenite non-recrystallized zone is 170 mm; the off-line quenching in step (5) Heat treatment: the steel plate is heated to 900°C for 160 minutes, rapidly quenched to roo...

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Abstract

The invention provides a super-thick high-hardenability HB500-grade wear-resistant steel plate and a manufacturing method thereof. The thickness of the steel plate ranges from 60 mm to 100 mm, and thecomponents comprise the following components of C, Si, Mn, less than or equal to 0.010% of P, less than or equal to 0.003% of S, Alt, Ni, Cr, Mo, Ti, less than or equal to 0.0050% of N, less than orequal to 0.00015% of H and the balance Fe and inevitable impurities. The manufacturing method of the wear-resistant steel plate comprises the steps of smelting, continuous casting blank slow cooling,forming rolling, quenching and tempering heat treatment. The manufacturing method of the wear-resistant steel plate has the advantages of being reasonable in design and easy to operate; and the steelplate obtained by using the preparation method has the advantages of being high in mechanical property uniformity and good in wear resistance.

Description

technical field [0001] The invention relates to the technical field of preparation of high-strength wear-resistant steel plates, in particular to an extra-thick and high-hardenability HB500 wear-resistant steel plate and a manufacturing method thereof. Background technique [0002] Low-alloy high-strength wear-resistant steel plate has good machinability and excellent wear-resistant performance. The service life is several times that of traditional structural steel plate and the production process is simple. The production of grinding steel plates has gradually scaled up, and has been widely used in coal mining machinery, engineering machinery, port machinery, mining equipment, dump trucks and other fields. Among them, the mining machinery field has a demand for wear-resistant steel plates with thick specifications and high wear-resistant grades. larger. [0003] The existing production of low-alloy high-strength wear-resistant steel is mainly concentrated in Japan, Germany...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/50C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0247C22C33/04C22C38/02C22C38/04C22C38/06C22C38/44C22C38/50
Inventor 彭宾李士安黄少文李玲许立清薄其伟王旭峰张海民姜晓军李楠李晓莉
Owner 贝斯山钢(山东)钢板有限公司
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