A wear-resistant rotary tillage blade flat steel hot rolling hardness regulation process
Through multi-stage process optimization, the problem of unstable hardness in hot-rolled flat steel for wear-resistant rotary tillers was solved, achieving precise control of hardness and uniformity of structure, improving the wear resistance and service life of rotary tillers, and ensuring production stability and pass rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN VALIN XIANGTAN IRON & STEEL CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
In existing production processes, the hot-rolled hardness stability of wear-resistant rotary tiller flat steel is poor, the composition control precision is insufficient, the alloy synergistic strengthening effect is unstable, and the compatibility of rolling and post-rolling cooling parameters is not good, resulting in the hot-rolled hardness deviating from the target range, affecting processing feasibility and service life.
The process employs a multi-stage approach, including precise composition control, converter smelting, LF refining, VD/RH vacuum treatment, continuous casting, and rolling. This approach incorporates optimization of core element ranges, control of harmful elements, control of gas content, optimization of post-rolling cooling methods, and process monitoring and closed-loop adjustment to ensure precise and stable hardness.
It achieves precise and stable hot-rolled hardness, improves the uniformity of composition and structure, balances processing and performance, reduces processing energy consumption and scrap rate, extends the field operation life of rotary tillers, and improves production stability and product qualification rate.