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Novel ultra-thin microalloy high-strength steel and preparation method thereof

A micro-alloy and high-strength steel technology, applied in the field of ultra-thin new micro-alloy high-strength steel and its preparation, can solve the problem that thickness specifications cannot meet ultra-thin thickness requirements, and achieve good market application prospects, excellent comprehensive performance, and stable mechanical properties. Effect

Inactive Publication Date: 2016-07-06
武汉钢铁有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies and provide a new type of ultra-thin micro-alloy high-strength steel and its preparation method. Through composition design and control of process parameters, the thickness specification of the same-level high-strength steel plate produced by the prior art cannot be achieved. Technical issues with ultra-thin thickness requirements to produce high-strength steel that meets ultra-thin specifications and has good formability

Method used

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  • Novel ultra-thin microalloy high-strength steel and preparation method thereof
  • Novel ultra-thin microalloy high-strength steel and preparation method thereof
  • Novel ultra-thin microalloy high-strength steel and preparation method thereof

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0027] Chemical composition design:

[0028] The chemical composition and weight percentage of the ultra-thin new microalloyed high-strength steel of Examples 1 to 6 and the comparative steel are shown in Table 1;

[0029] The manufacturing methods of the ultra-thin new microalloyed high-strength steel of Examples 1 to 6 are as follows:

[0030] 1) Grind pure Fe, C rod, electrolytic Mn, single crystal Si, Ti, V metals into powder particles according to their respective composition ratios;

[0031] 2) Use SLS carbon dioxide laser equipment to make the original steel plate with a thickness of 0.41~0.45mm, and the laser power is 100~150W;

[0032] 3) After a 2-high cold rolling mill with a cold rolling reduction ratio of 5 to 7%, a finished steel plate with a thickness of 0.39 to 0.42 mm is obtained;

[0033] 4) Use CCT-AWY thin plate steel plate heat treatment ...

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Abstract

The invention discloses novel ultra-thin microalloy high-strength steel and a preparation method thereof.The novel ultra-thin microalloy high-strength steel is prepared from, by weight, 0.01%-0.03% of C, 0.02%-0.03% of Si, 0.72%-0.75% of Mn, 0.02%-0.04% of Ti, 0.03%-0.05% of V and the balance Fe and unavoidable impurities.In addition, the invention further provides the preparation method of the novel ultra-thin microalloy high-strength steel.According to the novel ultra-thin microalloy high-strength steel and the preparation method thereof, the technical problem that the thickness specification of a same-class high-strength steel plate produced through the prior art cannot meet the ultra-thin requirement is solved through component design by cooperating with technological parameter control.

Description

Technical field [0001] The invention relates to the technical field of manufacturing steel for automobiles, in particular to an ultra-thin new microalloy high-strength steel and a preparation method thereof. Background technique [0002] Automotive steels are increasingly required to be lighter and thinner, while the thinnest specifications of the existing conventional smelted and rolled steels are ≥0.6mm, and the thickness specifications of the same-level high-strength steel plates produced by the existing technology cannot meet the ultra-thin thickness requirements. To achieve the need for significant weight reduction and energy saving of cars, how to produce high-strength steel that meets ultra-thin specifications and has good formability is an urgent problem in the steel industry. Summary of the invention [0003] The purpose of the present invention is to overcome the above shortcomings and provide a new type of ultra-thin microalloy high-strength steel and its preparation me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/12C21D8/02C21D1/26B22F3/105B33Y10/00
CPCC21D1/26C21D8/0236C22C38/02C22C38/04C22C38/12C22C38/14C21D2211/005C21D2211/003B22F10/00B22F10/38B22F10/28B22F10/64B22F12/41Y02P10/25
Inventor 王立辉周文强刘祥东林承江潘利波李立军
Owner 武汉钢铁有限公司
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