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我厂滚珠轴承钢生产是按部颁标准重10-52进行的,而夹杂物是根据标准的五级别图评定。过去,按上述条件生产检查尚能达到技术条件的要求,后来由于对滚珠钢夹杂物要求提高,原有操作水平已不能满足用户要求。为了找寻夹杂物的来源,遂于1956年12月进行此试验。试验过程及检验结果试验是在公称5吨碱性电炉上进行的。冶炼主要过程是:装炉料8,700公斤,用氧气做主要氧化剂,脱炭量0.40%以上,开始氧化温度1440℃(未
Our ball bearing steel production is carried out according to ministerial standards heavy 10-52, and inclusions are assessed according to the standard five level chart. In the past, according to the above conditions of production inspection can still meet the requirements of technical conditions, and later because of the ball steel inclusion requirements increase, the original level of operation has been unable to meet user requirements. In order to find the source of inclusions, then in December 1956 this test. Test process and test results The test is carried out in a nominal 5 tons of alkaline electric furnace. The main process of smelting is: charging 8,700 kilograms of charge, using oxygen as the main oxidant, removing more than 0.40% of carbon and starting the oxidation temperature of 1440 ℃