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A kind of production method of steel wear-resistant plate btw for coal mine

A production method and wear-resistant plate technology, applied in the field of metallurgy, can solve the problems of poor hardenability of steel plates, poor stability of strength and impact properties, and high cost, and achieve the effects of optimized rolling schedule, good surface quality, and reduced temperature drop.

Active Publication Date: 2021-10-29
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ordinary off-line quenching + tempering process mode cannot guarantee the strength and wear resistance required by users, and the quenching + tempering process has a long production cycle and high cost
[0003] At present, the BTW produced by other manufacturers in the industry has poor strength and impact performance stability, which cannot meet the requirements of users. The main technical bottleneck is the lack of sufficient undercooling after rolling, and the hardenability of the steel plate is poor.

Method used

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  • A kind of production method of steel wear-resistant plate btw for coal mine
  • A kind of production method of steel wear-resistant plate btw for coal mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The BTW thickness of the coal mine steel wear-resistant plate in this example is 40 mm, and its chemical composition and mass percentage are shown in Table 1.

[0024] The production method of the steel wear-resistant plate BTW for coal mines in this embodiment includes billet opening, billet heating, high-pressure water dephosphorization, rolling, cooling, and straightening processes, specifically including the following steps:

[0025] (1) Ingot billet opening process, the thickness of the billet is 250mm;

[0026] (2) Billet heating process, the temperature of the preheating section is 710°C, the temperature of the heating section is 950°C, the temperature of the second heating section is 1180°C, the temperature of the third heating section is 1260°C, and the temperature of the soaking section is 1250°C;

[0027] (3) High-pressure water dephosphorization process. In order to ensure the surface quality of the billet, high-pressure water descaling is used in the rollin...

Embodiment 2

[0033] The BTW thickness of the steel wear-resistant plate for coal mine in this example is 45 mm, and its chemical composition and mass percentage are shown in Table 1.

[0034] The production method of the steel wear-resistant plate BTW for coal mines in this embodiment includes billet opening, billet heating, high-pressure water dephosphorization, rolling, cooling, and straightening processes, specifically including the following steps:

[0035] (1) Ingot billet opening process, the thickness of the billet is 220mm;

[0036] (2) Billet heating process, the temperature of the preheating section is 720°C, the temperature of the heating section is 944°C, the temperature of the second heating section is 1193°C, the temperature of the third heating section is 1258°C, and the temperature of the soaking section is 1246°C;

[0037] (3) High-pressure water dephosphorization process. In order to ensure the surface quality of the billet, high-pressure water in the rolling mill is used...

Embodiment 3

[0043] The BTW thickness of the steel wear-resistant plate for coal mine in this example is 20 mm, and its chemical composition and mass percentage are shown in Table 1.

[0044] The production method of the coal mine steel wear-resistant plate BTW in this embodiment includes billet opening, billet heating, high-pressure water dephosphorization, rolling, cooling, and straightening processes, specifically including the following steps:

[0045] (1) Ingot billet opening process, the thickness of the billet is 180mm;

[0046] (2) Billet heating process, the temperature of the preheating section is 715°C, the temperature of the heating section is 925°C, the temperature of the second heating section is 1183°C, the temperature of the third heating section is 1261°C, and the temperature of the soaking section is 1256°C;

[0047] (3) High-pressure water dephosphorization process. In order to ensure the surface quality of the billet, high-pressure water descaling is used in the rolling...

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Abstract

The invention discloses a production method of a steel wear-resistant plate BTW for coal mines. The production method comprises the steps of steel ingot billeting, billet heating, high-pressure water dephosphorization, rolling, cooling and straightening. The invention controls the heating curve, optimizes the design of the rolling schedule, and controls the rapid cooling after rolling to obtain the steel wear-resistant plate BTW for coal mines with good surface quality, and the strength and wear resistance meet the requirements of users, and is widely used in the field of coal mines. The BTW thickness specification of the steel wear-resistant plate for coal mine obtained in the present invention is 15-50mm, and after the use performance is agreed with the user: the guaranteed tensile strength is ≥700MPa, the yield strength is 400-480MPa, and the impact energy is ≥80J; the wear-resistant plate BTW has a flat shape, Flatness ≤ 5mm / 1m, surface quality meets the requirements of GB / T14977 Class B, steel plate delivery without grinding.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of steel wear-resistant plates BTW for coal mines. Background technique [0002] Coal mine steel wear-resistant plate BTW is a steel plate delivered in a water-toughened state, and users have extremely high requirements for its strength, wear resistance, and impact resistance. The ordinary off-line quenching + tempering process mode cannot guarantee the strength and wear resistance required by users, and the quenching + tempering process has a long production cycle and high cost. [0003] At present, the BTW produced by other manufacturers in the industry has poor strength and impact performance stability, which cannot meet the user's requirements. The main technical bottleneck is the lack of sufficient undercooling after rolling, and the hardenability of the steel plate is poor. [0004] Therefore, there is an urgent need to develop a BTW prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C22C38/02C22C38/38
CPCC21D8/0226C22C38/02C22C38/38
Inventor 李晓光刘建磊张启远杜尚召王少义李兵高全信
Owner WUYANG IRON & STEEL
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