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一、前言 离子N-C-Ti三元共渗技术于1983年获国家发明奖后,由于对工件表面具有显著的耐磨损、耐腐蚀、耐疲劳等强化效果,近几年在国内许多厂家的备件生产上得到较广泛的应用。该技术作为交通部首次出口技术,转让给新加坡万度力修船公司在大型船舶备件上应用,得到了进一步发展。我们针对国外修船厂家及用户的实际需求,对离子N-C-Ti三元共渗工艺进行了一些实用研究,本文是这方面工作的一部分。 灰铸铁制汽缸套、活塞环是我们研究离子N-C-Ti三元共渗的最先应用件,在50A和100A离子轰击炉中,曾对内径φ80～520mm的快艇、渔轮、海船等发动机缸套进行过三元共渗处理。但在300A的大型离子轰击炉中对更大型缸套进行处理,并保证每炉最佳效果还是首次。无论是修船厂、使用配件的企业还是活塞环、缸套的制造厂,对此都十分感兴趣。经过工装和处理参数诸方面的改进协调,大型船用缸套和活塞环的离子N-C-Ti三元共渗强化在新加坡修船厂得到成功的应用。 对磨损失效后的活塞环槽的修复强化,我们进行了改变原焊条成分经堆焊修复后的离子N-C-Ti三元共渗研试,结果不仅达到了技术要求,取代了沿用30多年的镀铬工艺,而且节约了费用与工时,为修复强化活塞环槽和扩大离子N-C-Ti三元共渗技术的应用范围开辟了新途径。
First, the introduction of ion NC-Ti ternary osmosis technology in 1983 by the National Invention Award, due to the workpiece surface has significant wear resistance, corrosion resistance, fatigue and other strengthening effect in recent years, many domestic manufacturers of spare parts Production has been more widely used. This technology, as the first export technology of the Ministry of Communications, was transferred to Singapore Wanli Ship Repair Company for further application in large-scale ship spare parts. In response to the actual needs of foreign ship repair manufacturers and users, we have made some practical studies on the ion N-C-Ti ternary permeation process. This article is part of this work. Gray cast iron cylinder liner, piston ring is the first application of our research ion NC-Ti ternary permeation, in the 50A and 100A ion bombardment furnace, had on the diameter φ80 ~ 520mm speed boats, fishing vessels, marine and other engine cylinder Set of ternary osmosis treatment. But in the 300A large ion bombardment furnace, larger cylinder liners are processed and the best per-furnace performance is guaranteed for the first time. Whether it is a shipyards, the use of accessories business or piston rings, cylinder manufacturers, are very interested. After the coordination of tooling and processing parameters, the N-C-Ti ternary strengthening of large marine liner and piston ring was successfully applied in Singapore shipyard. After repairing and strengthening the piston ring groove after wear failure, we changed the NC-Ti ternary infiltration test after the original welding rod composition was repaired by the surfacing welding. The results not only meet the technical requirements, but also replaced the chrome plating Technology, but also save the cost and man-hours, which opens up a new way for repairing the ring groove of the reinforced piston and expanding the application range of the ion NC-Ti ternary permeation technology.