一种LF2钢的热处理方法
By improving the heat treatment process and controlling the Cr content of LF2 steel, the problem of insufficient low-temperature impact performance of LF2 steel after conventional normalizing was solved, and high-toughness normalized LF2 steel at -46℃ was achieved, meeting user needs and saving energy.
CN116590503BActive Publication Date: 2026-07-17NEWAY PRECISION FORGING (LIYANG) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NEWAY PRECISION FORGING (LIYANG) CO LTD
- Filing Date
- 2023-05-10
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The low-temperature impact properties of LF2 steel at -46℃ after conventional normalizing cannot meet user requirements, thus limiting the application of forgings.
Method used
A specific heat treatment method is adopted, including heating to the first austenite transformation temperature and holding, cooling to below the first austenite transformation temperature and holding, then heating to the second austenite transformation temperature and holding, and finally mist cooling to 350-400℃ and air cooling to room temperature, combined with the control of Cr element content.
Benefits of technology
It significantly improves the low-temperature impact toughness of LF2 steel at -46℃, meeting the performance requirements of users for normalized delivery, while saving energy.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116590503B_ABST
Abstract
本发明涉及钢铁生产技术领域，具体涉及一种LF2钢的热处理方法，包括如下步骤：将待处理LF2钢升温至第一奥氏体转化温度，保温；降温至比第一奥氏体转化温度低270～290℃，保温；升温至第二奥氏体温度，保温，其中第二奥氏体转化温度低于第一奥氏体转化温度；先雾冷至350～400℃，然后空冷至室温；且所述LF2钢中元素Cr含量为0.15％～0.30％。本发明通过热处理工艺的改进结合对LF2钢的成分控制，特别是元素Cr含量的限定，显著改善了正火态LF2钢的整体韧性。同时，在升温至第一奥氏体温度和升温至第二奥氏体温度之间，使LF2钢依旧保持高温，节省了再次加热的能源。
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