A new Fe-Cr-Ni-C martensitic stainless steel alloy, a preparation method and application thereof
By precisely controlling the composition of Fe-Cr-Ni-C alloy and the heat treatment process, the problem of optimizing the comprehensive performance of martensitic stainless steel was solved, achieving a synergistic improvement in high strength and corrosion resistance, making it suitable for modern equipment manufacturing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DALIAN JIAOTONG UNIVERSITY
- Filing Date
- 2026-04-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing martensitic stainless steels have difficulty achieving a synergistic optimization of comprehensive properties such as strength, toughness, plasticity, and corrosion resistance. In particular, there is a contradiction between high performance and low cost and ease of processing, making it difficult to meet the high strength and corrosion resistance requirements of modern equipment manufacturing.
By precisely controlling the composition of Fe-Cr-Ni-C alloy, especially the carbon content between 0.113% and 0.338%, a single-phase lath martensite structure is formed. Combined with vacuum induction melting and heat treatment processes, high strength, corrosion resistance, and structural stability are obtained, avoiding dependence on precipitation strengthening phases.
It achieves high strength (around 300 HV), excellent corrosion resistance (Icorr≤3.3×10-6A/cm2) and good hot workability, making it suitable for manufacturing complex components, reducing manufacturing costs and cycle time, and possessing industrialization potential.
Smart Images
Figure CN122406121A_ABST