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1989年7月—炼钢厂退废量达到3568吨,其中拉裂废品1108吨,占退废总量的31％,8月份前半个月拉裂废品已达776吨,拉裂废品呈逐月上升趋势。为了减少拉裂废品,找出产生拉裂的原因,提出解决措施,9月份公司组织进行5炉16MnR试验,结果简介如下。 1 拉裂与生产工艺从16MnR钢种研制开始,对钢坯拉裂形成机理和产生原因,已进行多次探讨,有的已作出结论。本次试验只对生产工艺过程中与钢坯拉裂有关的主要因素进行跟踪。平炉冶炼终点前10钟,炉内预脱氧时钢水温
July 1989 - The steelmaking plant has discharged 3568 tons of waste, of which 1108 tons of waste rupture occurred, accounting for 31% of the total amount of waste discharged. In the first half of August, the amount of waste ruptured reached 776 tons, Upward trend. In order to reduce the cracking of waste products to find out the reasons for the emergence of cracking, put forward solutions, the company organized in September 5 furnace 16MnR test results are summarized below. 1 Cracking and Production Process Since the development of 16MnR steel grades, the formation mechanism and causes of cracking of billet have been explored many times, and some have concluded. This test only tracks the main factors related to the cracking of billet in the production process. Open hearth smelting 10 minutes before the end of the furnace pre-deoxidation temperature of molten steel