High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof

A technology of low temperature toughness and wear-resistant steel plate, applied in the field of steel plate production, can solve the problems of unstable impact toughness at low temperature, poor hardness uniformity of steel plate, long delivery period of imported materials, etc., to eliminate residual stress, reduce internal porosity and segregation, Avoid the effect of excessive grain growth

Pending Publication Date: 2021-02-12
NANYANG HANYE SPECIAL STEEL CO LTD
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Problems solved by technology

The domestically produced high-strength 500HB level wear-resistant steel has extremely unstable low-temperature impact toughness, and the uniformity of hardness of the steel plate is poor, and the wear resistance is poor. Knife guards, liners of large mining dump trucks, buckets of large excavators and other parts are basically stil

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  • High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof
  • High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof
  • High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof

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[0019] The high-strength and low-temperature toughness wear-resistant steel plate HY550NME according to the present invention has a thickness of 8-100 mm, and contains the following chemical components by mass percentage (unit, wt%): C: 0.22-0.35, Si: 0.10-0.35, Mn: 1.0-1.25 , P≤0.020, S≤0.003, Als: 0.010~0.050, Nb: 0.025~0.040, Mo: 0.52~0.64, Ti: 0.005-0.025, B: 0.0008~0.0020, Ni: 0.32~0.40, Cr: 0.74~0.80 , Zr: 0.08 to 0.105, W: 0.25 to 0.30, and the others are Fe and residual elements.

[0020] The steps of the production method adopted by the present invention include: KR molten iron pretreatment, 120-ton top-bottom double blowing converter smelting, LF furnace refining, VD furnace refining, pouring, billet warm-cleaning and warm-loading, heating, rolling, and slow cooling of steel plate stacking , quenching + tempering treatment, finishing, external inspection, flaw detection.

[0021] KR hot metal pretreatment: The slag must be cleaned before the molten iron arrives at t...

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Abstract

The invention provides a high-strength low-temperature-toughness wear-resistant steel plate HY550NME with the thickness of 8-100 mm and a production method of the high-strength low-temperature-toughness wear-resistant steel plate HY550NME. The high-strength low-temperature-toughness wear-resistant steel plate HY550NME comprises the following chemical components: C, Si, Mn, P, S, Als, Nb, Ti, Mo, Ni, Cr, Zr, W, B and the balance Fe and residual elements. The production method of the high-strength low-temperature-toughness wear-resistant steel plate HY550NME comprises the steps of KR molten ironpretreatment, 120-ton top-bottom combined blowing converter smelting, LF furnace refining, VD furnace refining, pouring, billet temperature clearing and temperature loading, heating, rolling, steel plate stacking and slow cooling, quenching and tempering treatment and finishing. The proportion of the chemical components of the steel plate is reasonable, the produced steel plate is compact in structure, slight in segregation, high in hardness, stable in strength and better in low-temperature impact toughness, the hardness uniformity of the whole plate is controlled within 30HB, the low-temperature impact meets the design requirement of -40 DEG C, and each performance and index meet the related requirements of steel for special environment wear-resisting requirements.

Description

technical field [0001] The invention belongs to the field of steel plate production, and in particular relates to a high-strength low-temperature toughness wear-resistant steel plate HY550NME and a production method thereof. Background technique [0002] At present, domestic manufacturers of wear-resistant steel mainly supply three grades of steel, NM360, NM400, and NM450, with a material thickness of ≤60mm, which are mainly used in wear-resistant materials in the conventional machinery industry. The domestically produced high-strength 500HB level wear-resistant steel has extremely unstable low-temperature impact toughness, and the uniformity of hardness of the steel plate is poor, and the wear resistance is poor. Knife guards, liners of large mining dump trucks, buckets of large excavators and other parts are basically still using Hardox high-strength and toughness wear-resistant steel from SSAB in Sweden. Hardox wear-resistant steel has high strength and high hardness, and...

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44C22C38/48C22C38/50C22C38/54B22D27/04C21D8/02C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C38/48C22C38/44C22C38/50C22C38/54C22C33/04B22D27/04C21D8/0205C21D8/0226C21D8/0263
Inventor 许少普刘庆波李忠波康文举李红阳卓玉侠朱先兴袁高俭王勇白艺博杨春
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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