A kind of IF steel and preparation method thereof

A chemical composition, rough rolling technology, applied in the field of metal material processing, can solve the problems of low r value and high yield strength of IF steel, and achieve the effect of high r value and low yield strength

Active Publication Date: 2018-08-21
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an IF steel and its preparation method, which solves or partially solves the technical problems of high yield strength and low r value of IF steel in the prior art

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  • A kind of IF steel and preparation method thereof
  • A kind of IF steel and preparation method thereof
  • A kind of IF steel and preparation method thereof

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preparation example Construction

[0018] Based on the same inventive concept, the present invention also provides a kind of preparation method of IF steel, and described preparation method comprises the following steps:

[0019] Step 1, the molten iron is smelted to obtain a slab.

[0020] In step 2, the slab is hot-rolled, and then subjected to rough rolling and finish rolling to obtain a hot-rolled sheet, and then the hot-rolled sheet is cooled and curled into a hot-rolled coil after cooling.

[0021] In step 3, the hot-rolled coil is cold-rolled to obtain a chilled coil.

[0022] Step 4, subjecting the chilled coil to continuous annealing and hot-dip galvanizing, the annealing soaking temperature is 780-870° C., and then skin-curling to form a finished product.

[0023] The technical solution of the present invention sets the chemical composition mass percentage of IF steel as follows: C: 0-0.0030%, Mn: 0.05-0.5%, Al: 0.01-0.08%, Nb: 0.01-0.06%, Ti: 0.01-0.06% , the limiting elements Si≤0.06%, P≤0.02%, S≤...

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Abstract

The invention discloses IF steel and a preparing method thereof, and belongs to the field of metal material machining. The IF steel comprises chemical components including, by mass percent, 0%-0.0030% of C, 0.05%-0.5% of Mn, 0.01%-0.08% of Al, 0.01%-0.06% of Nb, 0.01%-0.06% of Ti, comprises limited elements including, by mass percent, smaller than or equal to 0.06% of Si, smaller than or equal to 0.02% of P, smaller than or equal to 0.01% of S, smaller than or equal to 0.005% of N, and the balance Fe. According to the IF steel and the preparing method thereof, the obtained IF steel has low yield strength and high r value.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to an IF steel and a preparation method thereof. Background technique [0002] At present, IF steel has excellent deep drawing performance, and has been widely used in the production of inner and outer panels of automobiles and home appliances with excellent deep drawing performance requirements. The mechanical properties of IF steel have the characteristics of low yield strength, high elongation and high r value, which can ensure that the steel plate has good formability. In order to obtain good formability, it is necessary to ensure that the IF steel plate has a high degree of purity, and at the same time ensure a reasonable whole-process manufacturing process. The conventional production process of IF steel is that after the slab is heated, hot rolling rough rolling and finishing rolling are carried out in the austenite zone, and a higher coiling temperature is adopted; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02
CPCC21D8/0226C21D8/0236C21D8/0242C21D8/0247C22C38/004C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 赵虎周旬王建功夏银锋黄学启王晓东崔阳滕华湘李飞
Owner SHOUGANG CORPORATION
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