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Production process of wear-resistant steel NM400E medium plate

A production process and wear-resistant steel technology, applied in the field of medium and thick plate production, can solve problems such as difficult production, easy segregation, looseness, etc.

Active Publication Date: 2013-04-03
NANYANG HANYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of NM400E alloy added, the steel plate is prone to defects such as segregation and porosity, and the steel has high requirements for strength, hardness, and low-temperature impact performance, so its production is difficult

Method used

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  • Production process of wear-resistant steel NM400E medium plate

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Embodiment Construction

[0010] The present invention uses turntable smelting and mold casting. The method of rolling the 3800m wide plate rolling machine to produce NM400E wear -resistant steel plates; its process process is: high -quality iron water, KR iron water interview, 100 / 120 tons of top background re -blowing furnace, LF furnace refining refinement, Vacuum -time off -air treatment, Cold Dilele Cold 24-60 hours, push steel heating furnace, 3800m rolling machine, ACC layer flow cooling, 11 roll heat orthopedic machines, stacking cold, refined fire, external inspection, detection, enrollment, input, input, input, enteringLibrary.

[0011] The NM400E steel plate with a thickness of 30 to 40mm in the present invention contains the following chemical composition (unit, WT%) of the percentage of quality (unit, WT%): ingredient design: C: 0.16 ~ 0.19, Si: 0.20 ~ 0.40, mn: 1.25 ~ 1.35, P: ≤0.015, s: ≤0.005, CR: 0.20 ~ 0.30, MO: 0.20 ~ 0.30, V: 0.04 ~ 0.06, NB: 0.17 ~ 0.03, TI: 0.17 ~ 0.26, ni: 0.25 ~ 0.3...

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Abstract

The invention discloses a production process of a wear-resistant steel NM400E medium plate. The production method disclosed by the invention comprises the steps of converter smelting, LF (Ladle Furnace) refining, vacuum refining, pouring, casting blank heating, rolling, slow cooling, heat treatment and the like. According to the invention, the cleanliness of the steel is guaranteed through reasonable chemical component design and processes of LF and VD (vacuum degassing); and high-strength NM400E steel with the thickness of 30-40 mm is successfully developed through the effective implementation of processes such as heating, rolling and thermal refining, wherein the yield strength of the steel is controlled at 1000-1100MPa, the tensile strength is controlled at 1200-1300MPa, the elongation is controlled at 13-17%, the V type impact energy at the temperature of minus 40 DEG C is controlled at 60-80J and the brinell hardness in a high-temperature tempering state is 380-420.

Description

Technical field [0001] The invention is the field of middle thick board production technology, which involves a production process of a thick board in NM400E NM400E. Background technique [0002] Due to high strength, hardness, and toughness, the cutting steel NM400E has good cutting and processing performance. It is mainly used for abrasion resistance structures such as large excavators, loaders, and rotating drills.Due to the large number of steel plates such as NM400E alloys, it is prone to defects such as bias, looseness, and the strength, hardness, and low temperature impact performance of the steel type, so it is difficult to produce. Invention content [0003] In response to the above -mentioned problems, after being explored by the inventor, a thick plate production method of 30mm to 40mm thick -wear -resistant steel NM400E was obtained, thereby completing the invention. [0004] Therefore, the purpose of the present invention is to provide a thick board for a wear -resi...

Claims

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Application Information

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IPC IPC(8): C22C38/50C21D8/02
Inventor 朱书成许少普李亮亮康文举唐郑磊袁永旗于飒王新
Owner NANYANG HANYE SPECIAL STEEL CO LTD
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