Steel for ultrahigh-strength mining round-link chain and preparation method thereof
By precisely controlling the element content and heat treatment process, a specific microstructure is formed, which solves the problem that the strength and toughness of existing ring chain steels are difficult to improve at the same time, and achieves ultra-high strength and excellent toughness of ring chain steels.
CN119710456AActive Publication Date: 2025-03-28CHINA IRON & STEEL RESEARCH INSTITUTE GROUP CO LTD +1
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Patent Information
- Application Number
- CN202411772661.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2044-12-04
AI Technical Summary
Technical Problem
The existing steel for ring chains is difficult to effectively improve the strength and toughness at the same time, and cannot meet the needs of the higher-level mining industry.
Method used
By accurately controlling the content of elements such as C, Si, Ni, Mn, Cr, Mo, etc., and adding vanadium and tungsten, combined with normalization, quenching and tempering processes, a microstructure of slat martensite and nano-scale precipitated phases is formed.
Benefits of technology
It achieves the comprehensive matching performance of ultra-high strength and excellent toughness and plasticity, with a yield strength ≥1310MPa and a tensile strength ≥1350MPa, and is suitable for high strength and high toughness mining ring chain applications.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses ultrahigh-strength mine round-link chain steel and a preparation method thereof, belongs to the technical field of round-link chain steel, and solves the problem that the strength and toughness of round-link chain steel cannot be effectively improved at the same time in the prior art. The ultrahigh-strength steel for the mining round-link chain comprises the following components in percentage by mass: 0.22%-0.27% of C, 0.10%-0.17% of Si, 0.48%-0.62% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.41%-0.66% of Cr, 0.88%-1.23% of Ni, 0.87%-1.13% of Mo, 0%-0.60% of Cu, 0.18%-0.36% of V, 0.21%-0.45% of W and the balance of Fe and inevitable impurities. The ultrahigh-strength steel for the mining round-link chain is high in strength and good in plasticity and toughness.
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