一种基于TRIP效应提升超高强海工钢强塑性的热处理方法
By optimizing the heat treatment process and controlling the stability and microstructure of the retained austenite, the problem of balancing strength and plasticity in ultra-high strength marine engineering steel was solved, achieving high strength and high elongation of marine engineering steel and improving its comprehensive mechanical properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANGANG STEEL CO LTD
- Filing Date
- 2023-08-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ultra-high strength marine steels reduce plasticity while increasing strength, making it difficult to simultaneously improve elongation. The TRIP effect is limited by the stability and volume fraction of retained austenite.
By developing and optimizing heat treatment processes, including austenitization pretreatment, two-phase region holding, and bi-stage bainite transformation region holding, the stability and microstructure of retained austenite are controlled, grain size and composition are optimized, fine martensite and thin-film retained austenite are formed, and the TRIP effect is exerted.
It significantly improves the comprehensive mechanical properties of ultra-high strength marine engineering steel, with increased yield strength and tensile strength, increased elongation, and excellent overall performance.
Smart Images
Figure CN117660732B_ABST