High-strength IF steel plate with yield strength of 170-300 Mpa level and production method

A technology of yield strength and production method, applied in the field of high-strength IF steel plate, can solve the problems of low strength of ultra-deep drawing grade IF steel plate

Inactive Publication Date: 2020-02-07
MAANSHAN IRON & STEEL CO LTD
4 Cites 2 Cited by

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Problems solved by technology

The patent is for ultra-deep drawing grade IF steel...
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Abstract

The invention provides a high-strength IF steel plate with yield strength of 170-300 Mpa level and a production method. The steel plate is prepared from, by mass, 0.004-0.010% of C, smaller than or equal to 0.030% of Si, 0.30-1.10% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.015% of S, 0.010-0.060% of Als, 0.010-0.080% of Ti, 0.010-0.060% of Nb, 0.010-0.050% of Cu, 0.0005-0.0080% of N, smaller than or equal to 0.0050% of O and the balance Fe and unavoidable impurity elements. Compared with the prior art, the high-strength IF steel plate has the advantages that the yield strength is greater than or equal to 170 MPa, the tensile strength is 330-460 MPa, the A80 is greater than or equal to 36%, the n value is greater than or equal to 0.19, the r value is greater than or equal to 1.6, and good matching of the strength and formation performance is achieved.

Technology Topic

Steel platesUltimate tensile strength

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  • High-strength IF steel plate with yield strength of 170-300 Mpa level and production method
  • High-strength IF steel plate with yield strength of 170-300 Mpa level and production method
  • High-strength IF steel plate with yield strength of 170-300 Mpa level and production method

Examples

  • Experimental program(1)
  • Comparison scheme(1)

Example

[0056] Example 1-Example 12
[0057] A high-strength IF steel plate with a yield strength of 170-300Mpa, including the following components by mass percentage: see Table 1 below. The rest is Fe and unavoidable impurity elements.

PUM

PropertyMeasurementUnit
Yield strength170.0 ~ 300.0mPa
Tensile strength330.0 ~ 460.0mPa

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