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我厂成批生产的钻头,牙爪都采用20铬钼钢,这种钢材不能充分满足钻头用钢的要求。 8720钢,是一种含铬、镍、钼量不高的低碳合金结构钢。它具有渗碳性好、淬透性强、机械性能及机加工性能良好等优点。 我厂在北京钢铁研究院、重庆钢厂的大力协作下,在1973年9月试制了11只牙爪用8720钢制造的川2-10Z型钻头。同年10月,这批钻头在威远地区49井进行了井下试验,最高进
I plant mass production of drill bits, jaws are used 20 chromium molybdenum steel, this steel can not fully meet the requirements of drill steel. 8720 steel, is a low-carbon alloy structural steel containing chromium, nickel and molybdenum. It has good carburization, hardenability, mechanical properties and machinability is good and so on. I plant in Beijing Institute of Iron and Steel, Chongqing Steel’s vigorous collaboration, in September 1973 trial production of 11 tooth claws 8720 steel manufacturing Chuan 2-10Z type drill. In the same year in October, these drills were tested downhole in Well 49, Weiyuan, with the maximum height