本文从美国波文打捞公司引进的打捞筒卡瓦为试样,通过分析研究,弄清了其化学成份、性能、热处理制度。为我国生产新式打捞工具提供了资料和技术条件。文中分析了卡瓦服役条件,对我国现有碳氮共渗工艺进行了调整。调整后的碳氮共渗工艺,做了力学性能模拟试验,表明国产卡瓦质量已赶上了美国。 This article from the United States Bowen Salvage Company introduced the salvaging kava as a sample, through the analysis, to clarify its chemical composition, performance, heat treatment system. It provided materials and technical conditions for the production of new fishing tools in our country. The paper analyzes the service conditions of kava and adjusts the existing carbonitriding technology in our country. After the adjustment of carbonitriding process, made a mechanical simulation test shows that the quality of domestic slips have caught up with the United States.