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沈阳市新城石油机械厂研制成功的CYB-225THM7.5-1.2整筒抽油泵于1992年获沈阳市科技进步一等奖,并通过省级鉴定。 该厂采用国内外领先的稀土氮碳硼共渗技术,在650℃温度下对20钢和45钢整筒泵进行稀土氮
Shenyang Metro Metro Machinery Factory successfully developed CYB-225THM7.5-1.2 whole cylinder pump in 1992 by the Shenyang Municipal Science and Technology Progress Award, and passed the provincial appraisal. The plant uses leading rare earth boron carbonitriding technology at home and abroad, at 650 ℃ temperature 20 and 45 steel cylinder pump rare earth nitrogen