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主要介绍冷镦钢系列中的代表钢种ML35冷镦钢热轧盘条的开发和生产过程。通过分析研究主要化学元素对钢的作用,在国标的基础上确定ML35冷镦钢热轧盘条化学成分,并根据冷镦钢产品的技术特点,制定合适的轧制工艺,采用加热段≤1 050℃,均热段(980±20)℃,开轧温度(920±30)℃,吐丝温度860~880℃,延迟冷却方式,最终在龙钢公司成功开发出符合标准要求的ML35冷镦钢热轧盘条产品。
Mainly introduces the development and production process of the hot-rolled steel rod for cold heading steel ML35 in cold heading steel series. Based on the analysis of the effect of main chemical elements on the steel, the chemical composition of ML35 cold-heading hot-rolled steel strip was determined on the basis of the national standard. According to the technical characteristics of the cold heading steel product, a suitable rolling process was established. 050 ℃, soaking period (980 ± 20) ℃, rolling temperature (920 ± 30) ℃, spinning temperature 860 ~ 880 ℃, and delayed cooling method. Finally, the company successfully developed the standard ML35 cold heading Hot-rolled steel rod products.