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A quenching method for ultra-thin wear-resistant steel plate

A technology of wear-resistant steel plates and specifications, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as unqualified plate shapes, and achieve the effect of improving the quality of plate shapes

Active Publication Date: 2020-01-07
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a quenching method for ultra-thin wear-resistant steel plates to solve the problem that the shape of the ultra-thin wear-resistant steel plates below 6mm is unqualified after quenching

Method used

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  • A quenching method for ultra-thin wear-resistant steel plate
  • A quenching method for ultra-thin wear-resistant steel plate
  • A quenching method for ultra-thin wear-resistant steel plate

Examples

Experimental program
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Effect test

Embodiment

[0023] The process parameters, performance and physical roughness of each embodiment are shown in Table 2.

[0024] Table 2

[0025]

[0026] The performance indicators of the tested wear-resistant steel plates are shown in Table 3.

[0027] table 3

[0028]

[0029] The above examples show that the performance of NM360, NM400, NM450, NM500, NM550, and NM600 steel plates for heat treatment and quenching with a thickness of ≤6mm is acceptable, and the flatness of the plate can reach below 5mm / m.

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Abstract

The invention relates to a quenching method of an ultra-thin abrasion-resistant steel plate. The method is suitable for NM360, NM400, NM450, NM500, NM550 and NM600 steel plates and includes the following steps that (1) heat treatment is performed for heating, specifically, segmented heating is performed, the temperature of an inlet segment is 860-920 DEG C, and the temperature of an outlet segmentis 600-750 DEG C; (2) the quenching cooling rate of a high-pressure area is higher than or equal to 40 DEG C / s, and the quenching cooling rate of a low-pressure area is lower than or equal to 15 DEGC / s; (3) the water flowrate ratio of the water supply and drainage of quenching is 0.70-0.8; (4) the quenching roller way speed is higher than or equal to 50 m / min; and (5) the quenching steel plate temperature is lower than or equal to 80 DEG C. The quenching method of the ultra-thin abrasion-resistant steel plate has the advantages that the problem that the plate shape of an abrasion-resistant steel plate which is smaller than 6 mm in thickness is unqualified after quenching is finished is solved through a low-temperature quenching method, the straightness of the steel plate which is alreadyquenched can reach to 5 mm / m or below, tempering can be performed by directly getting into furnace, the plate shape is greatly improved compared with that of a quenched steel plate of an original process, and the quality of the plate shape of the steep plate is improved.

Description

technical field [0001] The invention relates to a quenching method of an ultra-thin wear-resistant steel plate, in particular to a method for low-temperature quenching of a wear-resistant steel plate with a specification below 6 mm. Background technique [0002] With the wide application of wear-resistant steel in coal mines, mine cars, and transport trailers, the demand for ultra-thin wear-resistant steel plates is increasing, and users have higher requirements for the flatness of the wear-resistant steel for ease of use. getting stricter. In order to ensure high hardness and wear resistance of wear-resistant steel, the general production process is produced by heat treatment quenching and tempering. Take the wear-resistant steel plate NM450 as an example. The steel plate is delivered in a quenched + tempered state, and the quenching temperature is 860 -920°C, the temperature drops to room temperature after quenching, and the temperature difference before and after quenchi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D6/00C21D9/00C21D11/00
CPCC21D1/18C21D6/00C21D9/0081C21D11/00
Inventor 石锋涛冉永亮侯华兴黄松张涛
Owner ANGANG STEEL CO LTD