Production method for ASTM A514 GrE high-strength steel plates

A production method and high-strength steel plate technology, applied in the field of metallurgy, can solve problems such as tight supply of thick plates, and achieve the effects of solving tight supply, optimizing rolling and quenching and tempering processes, and controlling rolling and cooling parameters

Inactive Publication Date: 2016-08-24
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a production method of ASTM A514 GrE high-strength steel plate with large thickness and high toughness. By adjusting the ratio of alloy elements in the steel plate and optimizing the rolling and quenching and tempering process, a large steel plate with good structure, comprehensive performance and welding performance can be obtained. Thickness, high toughness steel plate, solves the problem of tight supply of thick plate, has a good market prospect

Method used

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  • Production method for ASTM A514 GrE high-strength steel plates
  • Production method for ASTM A514 GrE high-strength steel plates
  • Production method for ASTM A514 GrE high-strength steel plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The actual composition (by weight percentage) of the A514GrE steel plate in this example is: C: 0.15%, Si: 0.42%, Mn: 1.59%, P: 0.015%, S: 0.005%, Cr: 1.62%, Mo: 0.46% , Ti: 0.040%, Ni: 0.008%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 150mm.

[0033] The production method is as follows:

[0034] (1) Steel plates are produced by die casting;

[0035] (2) Rolling process: Type II controlled rolling process is adopted. After the first stage of rolling, the cooling red temperature is 820°C, the second stage is 800°C for starting rolling, 710°C for final rolling, and the cumulative reduction rate is 55%. , back to red at 630°C.

[0036] (3) Heat treatment process: the steel plate is quenched and tempered (2 times of quenching + tempering). Quenching process: the temperature is 930°C, the holding time is 80min, the steel plate 2 is quenched and then tempered. The tempering temperature is 655°C. The coefficient is 5min / mm, and the sa...

Embodiment 2

[0039] The actual composition (by weight percentage) of the A514GrE steel plate in this example is: C: 0.18%, Si: 0.50%, Mn: 1.65%, P: 0.012%, S: 0.002%, Cr: 1.82%, Mo: 0.56% , Ti: 0.048%, Ni: 0.008%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 163mm.

[0040] The production method is as follows:

[0041] (1) Steel plates are produced by die casting;

[0042] (2) Rolling process: Type II controlled rolling process is adopted. After the first stage of rolling, the temperature of cooling back to red is 840°C, the temperature of starting rolling in the second stage is 820°C, the temperature of final rolling is 720°C, and the cumulative reduction rate is 55%. , back to red at 600°C.

[0043] (3) Heat treatment process: the steel plate is quenched and tempered (2 times of quenching + tempering). Quenching process: the temperature is 940°C, the holding time is 90min, the steel plate is quenched twice and then tempered. The tempering temperature ...

Embodiment 3

[0046] The actual composition (by weight percentage) of the A514GrE steel plate in this example is: C: 0.20%, Si: 0.55%, Mn: 1.70%, P: 0.005%, S: 0.001%, Cr: 2.0%, Mo: 0.60%, Ti: 0.046%, Ni: 0.008%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 177.8mm.

[0047] Production method of the present invention is as follows:

[0048] (1) Steel plates are produced by die casting;

[0049] (2) Rolling process: Type II controlled rolling process is adopted. After the first stage of rolling, the cooling red temperature is 830°C, the second stage is 805°C for starting rolling, 705°C for final rolling, and the cumulative reduction rate is 50%. , back to red at 615°C.

[0050] (3) Heat treatment process: the steel plate is quenched and tempered (2 times of quenching + tempering), quenching process: the temperature is 950 ° C, the holding time is 100 min, the steel plate is quenched twice and then tempered, the tempering temperature is 650 ° C, heated ...

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Abstract

The invention discloses a production method for ASTM A514 GrE high-strength steel plates. The steel plates are composed of, by weight, 0.14-0.20% of C, 0.35-0.55% of Si, 1.55-1.70% of Mn, P smaller than or equal to 0.015%, S smaller than or equal to 0.005%, 1.40-2.0% of Cr, 0.40-0.60% of Mo, 0.040-0.050% of Ti and the balance Fe and inevitable impurities. The steel plates are produced through the rolling technology and the hardening and tempering technology; the II type controlled rolling technology is adopted; the treatment of quenching of two times and tempering is adopted. According to the production method, by adjusting the proportion of alloy elements in the steel plates and optimizing the rolling technology and the hardening and tempering technology, the large-thickness steel plates with good structures, overall performance and welding performance can be obtained, the problem that supply of the thick plates is insufficient is solved, and the market prospect is good.

Description

technical field [0001] The invention relates to a production method of an ASTM A514 GrE high-strength steel plate, belonging to the technical field of metallurgy. Background technique [0002] Most of the 70kg high-strength steel used in the domestic construction machinery industry comes from imports such as Japan WELTEN70C, SUMITEN70, Sweden SUMTIN690, American A514Gr. ) content is higher, alloy content such as Cr (1.50%), Ni (1.80%) is higher, so the price of imported steel is generally high. [0003] As the amount of high-strength steel in the domestic manufacturing industry gradually increases, some domestic steel manufacturers have begun to produce high-strength steel plates, but the thickness specification range is narrow, all below 60mm, which cannot meet the growing market demand for thick plates. Contents of the invention [0004] The invention provides a production method of ASTM A514 GrE high-strength steel plate with large thickness and high toughness. By adju...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/12C22C38/14C21D1/25C21D8/02C21D9/00
CPCC22C38/02C21D1/25C21D8/0247C21D9/0081C22C38/04C22C38/12C22C38/14C22C38/18
Inventor 邓建军刘丹王青王会岭谷盟森刘利香张鹏云张亚丽张西忠付冬阳宋庆吉赵喜伟
Owner WUYANG IRON & STEEL
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