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Easy-weld hardening high-strength steel plate and production method thereof

A technology of high-strength steel plates and production methods, applied in the direction of welding media, welding/cutting media/materials, welding equipment, etc., can solve the problems of unable to meet the market demand of thick plates and narrow specification range, and achieve excellent comprehensive performance and precious metal content Less, the effect of reducing production costs

Inactive Publication Date: 2009-03-11
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the amount of high-strength steel in the domestic construction machinery industry gradually increases, some domestic steel manufacturers produce steel plates of this level, but due to the narrow range of specifications, all are below 60mm, which cannot meet the growing market demand for thick plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The composition of quenched and tempered high-strength steel in this embodiment is as follows: C 0.10%, Si 0.20%, Mn 0.94%, P 0.015%, S 0.004%, Mo 0.38%, Ni 0.86%, Cr 0.47% %, Nb 0.055%, V 0.053%, B 0.002%, Ti 0.022%, and the balance is Fe and unavoidable inclusions. Ceq is 0.48%, rolled into 48mm steel plate.

[0033] Its mechanical properties: yield strength: 795MPa, tensile strength: 830MPa, A is 17.5%, -20 ℃ impact energy AKV (longitudinal) 190, 168, 150J, cold bending test D = 3a, 180 ° intact.

Embodiment 2

[0035] The composition of the quenched and tempered high-strength steel in this embodiment is as follows: furnace number C 0.12%, Si 0.30%, Mn 0.95%, P 0.008%, S 0.003%, Mo 0.37%, Ni 1.14%, Cr 0.61%, Nb 0.057%, V 0.056%, B 0.0020%, Ti 0.020%, and the balance is Fe and unavoidable inclusions. Ceq is 0.56%, rolled into 80mm steel plate.

[0036] Its mechanical properties: yield strength: 830MPa, tensile strength: 910MPa, A is 16%, -20 ℃ impact energy AKV (longitudinal) 150, 97, 174J, cold bending test D = 3a, 180 ° intact.

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PUM

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Abstract

The invention relates to an easily welded, hardened and tempered high-intensity steel plate and its producing method, which comprises the following part: C<=0.15%, 0.15%-0.50% Si, 0.80%-1.80% Mn, P<=0.02%, S<=0.01%, Mn<=0.6%, Nb<=0.07%, B<=0.003%, Ni<=1.20%, Cr<=0.80%, Ti<=0.03%, V<=0.08%, the rest Fe and unavoidable impurity. The invention smelts with the electric furnace, which is provided with the low quantity P, S and the pure steel, gets the users' favor, has the low cost and the market competitive ability, solves the problem of big crystal grain and low dynamic ductility, and is fit for producing the high-intensity steel with low draught pressure rolling mill in the other steel factory. The invention also reduces the labor strength, which saves the time of the work, improves the availability ratio of the material, and reduces the leveling expense of making the steel plate.

Description

technical field [0001] The invention relates to an easy-weld quenched and tempered high-strength WH80Q steel plate, and also relates to a production method of the easy-weld quenched and tempered high-strength steel plate, belonging to the field of low-alloy high-strength welded structural steel manufacturing. Background technique [0002] Traditional quenched and tempered steel has the disadvantages of high carbon content, high alloy content and high carbon equivalent, which bring about high cost and unsatisfactory welding performance. Most of the 80kg high-strength steel used in the domestic construction machinery industry comes from imports such as Japan WELTEN80C, SUMITEN80, Sweden SUMTIN780, the United States A514Gr.B and DILLMAX690 steel plates produced by German DILLINGER Steel Company, and the content of C (0.18%) in DILLMAX690 steel plates produced by German DILLINGER Steel Company Higher, Cr (1.50%), Ni (1.80%) alloy content is higher, the cost price of steel plate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/50B23K35/22C22C33/04B21B37/16B21B37/74C21D8/02C21D11/00B21B37/58
Inventor 叶建军林明新梁永昌谢良法陆岳璋赵全卿李涛刘新民赵文忠郭桐林建农吴永斌李红文崔强王培玉吴建鹏王九清田苗
Owner WUYANG IRON & STEEL
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