A method for simultaneously improving the strength and ductility of low-carbon low-alloy steel

A low-alloy steel, plastic technology, applied in the field of metal materials, can solve the problems of inability to achieve strong plastic matching, difficult to recover plastic, steel strength decline, etc., to maintain the deformation strengthening effect, improve the plastic deformation ability of steel, reduce carbon content Effect
CN113322365BActive Publication Date: 2022-05-20BEIJING INSTITUTE OF TECHNOLOGYGY
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2022-05-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method for simultaneously improving the strength and plasticity of low-carbon low-alloy steel, belonging to the technical field of metal materials. According to the method, a quenched low-alloy steel containing Mo and containing more than one of V, Nb and Ti is sequentially subjected to tempering treatment, dynamic large deformation and annealing treatment to obtain a low-carbon low-carbon steel with high strength and high plasticity at the same time. Low-alloy steel. The carbides precipitated in the tempered low-carbon low-alloy steel containing strong carbide-forming elements can further refine the grains during the dynamic large deformation process, and the large amount of fine dispersed carbides in the subsequent annealing process provides significant The strengthening effect of the second phase is also beneficial to the improvement of steel plasticity.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for simultaneously improving the strength and plasticity of low-carbon low-alloy steel, belonging to the technical field of metal materials. Background technique

[0002] Low-carbon low-alloy steel (alloy steel with carbon content less than or equal to 0.2% and total alloy elements less than 5%) usually has high strength (yield strength 500-900MPa), good plasticity (elongation 10%-20%) ) and low cost, it is widely used in various engineering structures such as buildings, automobiles, bridges, ships, pressure vessels, offshore oil drilling platforms, etc., and has significant economic value and social benefits. However, in recent decades, the continuous development of engineering applications has put forward higher requirements on the mechanical properties of steel, especially the yield strength and plasticity.

[0003] Large deformation process is a common method of strengthening steel. According to the strain rate of...

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
Login to View More