1100Mpa grade non modified high-strength steel and production process thereof

Abstract

This invention relates to 1100Mpa grade of quenched and tempered high tensile strength plate and its preparation method, the weight ratio of its chemical ingredients are as fellows: C 0.29-0.35%, Si 0.22-0.45%, Mn 1.40-1.75%, P, S 0.002-0.035%, Als 0.015-0.04%, V 0.05-0.12%, Ti 0.015-0.030, Cr 0.04-0.30%, Ni, Cu 0.01-0.30%, N 80-120ppm, the other is Fe and inevitable impurity. The process of preparation is as fellows: smelting-refining out of the furnace- continuous casting-hot band rolling-cold rolling the band steel. The bank steel which is prepared by this way had excellent mechanical property and extensibility, its processes of preparation is stable and easy, low consumption of energy and high production efficiency, and it can range to round steel. It is a material which can widely apply to light industry and mechanical manufacturing.

Description

technical field [0001] The invention belongs to the technical field of alloy steel production, and in particular relates to a 1100Mpa non-quenched and tempered high-strength steel and a production method thereof. Background technique [0002] At present, the carbon structural steel and alloy steel structure are widely used in the machinery manufacturing industry to make mechanical parts. In order to make the parts have good comprehensive mechanical properties, they generally have to undergo quenching and tempering heat treatment. In order to save energy and reduce manufacturing costs, both at home and abroad are committed to Develop structural steel that does not require quenching and tempering heat treatment, but until now, it is suitable for industrial production. The product does not undergo quenching and tempering treatment. After cold working, the mechanical properties of the steel can reach a strength of more than 1100Mpa, and at the same time, it has an average elongat...

AI Technical Summary

Problems solved by technology

[0002] At present, the carbon structural steel and alloy steel structure are widely used in the machinery manufacturing industry to make mechanical parts. In order to make the parts have good comprehensive mechanical properties, they generally have to undergo quenching and tempering heat treatment. In order to save energy and reduce manufacturing costs, both at home and abroad are committed to Develop structural steel that does not require quenching and tempering heat treatment, but until now, it is suitable for industrial production. The product does not undergo quenching and tempering treatment. After cold working, the mechanical properties of the steel can reach a strength of more than 1100Mpa, and at the same time, it has an average elongation of more than 10%. There is no report, therefore, the research, development and production of 1100Mpa non-quenched and tempered high-strength steel and its production method have broad market prospects