70MnVS4炼钢过程中硫添加的建模与优化:一个工业案例研究

IF 2.8 3区工程技术 Q2 ENGINEERING, MANUFACTURING

Advances in Production Engineering & Management Pub Date : 2021-06-25 DOI:10.14743/apem2021.2.398

M. Kovačič, B. Leser, M. Brezocnik

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引用次数: 2

摘要

Štore钢铁有限公司是欧洲主要的平板弹簧钢生产商之一。在数百种钢种中，还生产70MnVS4钢。本文介绍了70MnVS4钢的炼钢工艺优化。70MnVS4是一种高强度微合金钢，用于汽车行业连杆的锻造。70MnVS4钢包处理过程中，熔体加硫应只进行一次。由于多种原因，在连铸过程中反复添加硫会造成堵塞，从而影响表面缺陷的发生和钢的清洁度。据此，利用线性回归和遗传规划对硫的添加量进行了预测。在2018年1月至2018年12月期间(共78个铸造批次)收集了以下参数:攻丝后化学分析后添加硫和碳芯线，攻丝后碳、锰和硫含量，攻丝后化学分析与开始铸造之间的时间，添加锰铁和硅铁以及添加额外的硫芯线。根据模拟结果，发现锰铁是影响最大的参数。因此，在2019年2月至2019年10月的12个铸造批次中，锰铁的添加量尽可能低。在所有12种情况下，都不需要额外添加硫。减少锰铁添加量后，熔体加工时间、轧制材料表面质量和硫包芯线材消耗无统计学意义的变化。钢的洁净度有统计学上的显著改善。

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Modelling and optimization of sulfur addition during 70MnVS4 steelmaking: An industrial case study

Štore Steel Ltd. is one of the major flat spring steel producers in Europe. Among several hundred steel grades, 70MnVS4 steel is also produced. In the paper optimization of steelmaking of 70MnVS4 steel is presented. 70MnVS4 is a high-strength microalloyed steel which is used for forging of connecting rods in the automotive industry. During 70MnVS4 ladle treatment, the sulfur addition in the melt should be conducted only once. For several reasons the sulfur is repeatedly added and therefore threatening clogging during continuous casting and as such influencing surface defects occurrence and steel cleanliness. Accordingly, the additional sulfur addition was predicted using linear regression and genetic programming. Following parameters were collected within the period from January 2018 to December 2018 (78 consequently cast batches): sulfur and carbon cored wire addition after chemical analysis after tapping, carbon, manganese and sulfur content after tapping, time between chemical analysis after tapping and starting of the casting, ferromanganese and ferrosilicon addition and additional sulfur cored wire addition. Based on modelling results it was found out that the ferromanganese is the most influential parameter. Accordingly, 12 consequently cast batches (from February 2019 to October 2019) were produced with as lower as possible addition of ferromanganese. The additional sulfur addition in all 12 cases was not needed. Also, the melt processing time, surface quality of rolled material and sulfur cored wire consumption did not change statistically significantly after reduction of ferromanganese addition. The steel cleanliness was statistically significantly better.

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来源期刊

Advances in Production Engineering & Management ENGINEERING, MANUFACTURINGMATERIALS SCIENC-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

22.20%

发文量

期刊介绍： Advances in Production Engineering & Management (APEM journal) is an interdisciplinary international academic journal published quarterly. The main goal of the APEM journal is to present original, high quality, theoretical and application-oriented research developments in all areas of production engineering and production management to a broad audience of academics and practitioners. In order to bridge the gap between theory and practice, applications based on advanced theory and case studies are particularly welcome. For theoretical papers, their originality and research contributions are the main factors in the evaluation process. General approaches, formalisms, algorithms or techniques should be illustrated with significant applications that demonstrate their applicability to real-world problems. Please note the APEM journal is not intended especially for studying problems in the finance, economics, business, and bank sectors even though the methodology in the paper is quality/project management oriented. Therefore, the papers should include a substantial level of engineering issues in the field of manufacturing engineering.