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罗马尼亚机械工业部门试验成功的抽油机深井泵衬套表面渗氮新工艺,曾于1972年秋在维也纳举办的国际发明展览会上获得金质奖章。由于原油中常含有硫和砂子,为了使深井泵衬套增强耐腐蚀和耐磨性能,衬套通常用铬钼铝合金钢或铬铝合金钢制成,衬套表面还要在游离状的氨气中进行表面渗氮处理,以增加硬度。但即使这样,衬套仍经常受腐蚀或磨损,因而不得不停泵检修,更换衬套。气体渗氮法所需设备价格昂贵。表面渗氮所需
Romanian machinery industry successfully tested the new technology of surface nitriding on the deep well pump bushings of the pumping unit and won the gold medal at the International Invention Exhibition held in Vienna in the autumn of 1972. As crude oil often contains sulfur and sand, in order to make deep well pump bushings to enhance corrosion resistance and wear resistance, the bushing is usually made of chrome molybdenum aluminum alloy steel or chrome aluminum alloy steel, bushing surface but also free ammonia In the surface nitriding treatment to increase the hardness. But even then, the bushings are often subject to corrosion or wear and have to stop the pump overhaul and replace the bushings. Gas nitriding equipment required expensive. Surface nitriding required