Method for producing high-toughness laminar tearing-resistant Z-direction steel with thickness of 50mm

Abstract

The invention discloses a method for producing high-toughness laminar tearing-resistant Z-direction steel with a thickness of 50mm. The method comprises two parts of design of steelmaking component process parameters and design of steel rolling process parameters, and specifically comprises the following steps that the steelmaking component process parameters are designed, specifically, thick-specification wind power steel Z-direction lamellar-tearing-resistant steel comprises the following components of, in percentage by weight, 0.14 wt.% of C, 0.36 wt.% of Si, 1.30 wt.% of Mn, 0.014 wt.% of P, 0.007 wt.% of S, 0.016 wt.% of V, 0.018 wt.% of Nb, 0.033 wt.% of Als, 0.022 wt.% of Ti and 0.002 wt.% of Ca; and 2), the steel rolling process parameters are designed, specifically, the wind power steel plate with the thickness of 50 mm is produced through the method, the product performance is good, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a production method of high-toughness layer tear-resistant Z-direction steel with a thickness of 50 mm. Background technique [0002] During the rolling process of the steel plate, as the thickness of the plate increases, the compression ratio in the thickness direction decreases relatively, and the mechanical properties of the steel plate are different in three directions: the performance along the rolling direction is the best; the performance perpendicular to the rolling direction Slightly worse: the performance along the thickness direction is second. For steel rolled with general quality steel, especially for thick steel plates, local delamination is often unavoidable. Delamination mainly comes from defects such as sulfur and phosphorus segregation and non-metallic inclusions in steel, which will affect the mechanical properties of steel. The thickness direction performance of the medium and heavy plate needs to meet the...

AI Technical Summary

Problems solved by technology

T-joints are often formed during the welding process. During welding, the steel plate bears relatively large Z-direction tensile stress. If the steel plate has poor resistance to lamellar tearing, lamellar tearing may occur in these parts. cause a serious accident

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