Mn-TRIP steel plate with product of strength and elongation of 50 GPa% for automobile and preparation method of Mn-TRIP steel plate

A technology of strong plastic products and steel plates, which is applied in the direction of improving process efficiency and can solve the problems of increasing the cost of material alloys
CN113073261AActive Publication Date: 2021-07-06ANGANG STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANGANG STEEL CO LTD
Publication Date
2021-07-06

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Abstract

The invention relates to a Mn-TRIP steel plate with a product of strength and elongation of 50 GPa% for an automobile and a preparation method of the Mn-TRIP steel plate. The steel plate comprises the following chemical components of, in percentage by mass, 0.18%-0.28% of C, 0.3%-1.2% of Si, 2.8%-3.8% of Mn, 0.9%-1.9% of Al, less than or equal to 0.05% of P, less than or equal to 0.05% of S, 0.10%-0.20% of V and the balance of Fe and inevitable impurities. According to the steel plate, the addition amount of alloy elements in the steel plate is greatly reduced compared with that of traditional medium manganese steel, no precious alloy elements such as Cr and Mo needs to be added, and the deep cooling rolling process and the double annealing process are combined to achieve the effect of strengthening and plastification; and the process stability is good, the structure homogenization degree is high, and the production safety is high.
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Description

technical field

[0001] The invention relates to the field of advanced high-strength steel manufacturing, in particular to a Mn-TRIP steel plate for automobiles with a strength-plasticity content of 50GPa% and a preparation method. Background technique

[0002] With the continuous improvement of automobile lightweight requirements, more and more high-strength steels above 980MPa are used in body structures and reinforcements. At present, the mainstream product types of high-strength steel for automobiles above 980MPa mainly include dual-phase steel (DP steel), quenched and partitioned steel (QP steel), martensitic steel (MS steel), etc. However, even the most ductile QP steel has an elongation of only 20%. Low plasticity not only limits the application of high-strength steel in body structural parts, but also increases the difficulty of forming parts.

[0003] With the development of medium manganese steel, the concept of strength-plastic product has been mentioned more and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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