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联邦德国的金属热处理技术比较先进,有些新工艺是由他们开创并发展的,下面扼要介绍作者在联邦德国所了解的部分情况。一、无污染盐浴氮碳共渗七十年代初,德固沙公司发展了在盐浴中不用氰化物以及处理旧盐的方法,即Tenifer新法,又称TFI法。这种方法简化了盐浴氮碳共渗工艺,保证了良好的产品质量。 TFI新法在处理一段时间后,盐浴中添加REGI(即Regenerafor)的物质,它是含C、N、H等的人造有机化合物。REGI的加入,使盐浴中部分碳酸盐重新形成氰酸盐,使旧盐更新。加入的TFI基本盐和REGI都不含氰化物。在生产过程中,盐浴成份中的氰酸根要求控制到(CNO~-)33～38%,氰化物(CN~-)<2.5～3%。为此在处理24h后,一般需补充0.6～0.8%REGI,这时盐浴容积不变。
Federal German metal heat treatment technology is more advanced, some new technology is created and developed by them, the following brief introduction of the author in the Federal Republic of Germany to understand some of the situation. First, pollution-free salt-bath carbonitriding The early seventies, Degussa company developed a salt bath without cyanide and the old salt treatment method, that is, Tenifer new method, also known as TFI method. This method simplifies the salt bath nitrocarburizing process, ensuring good product quality. After a period of time, the new TFI method adds REGI (Regenerafor) to salt bath, which is a man-made organic compound containing C, N, H and so on. The addition of REGI renders part of the carbonate salt in the salt bath to form a cyanate and renews the old salt. Neither the TFI basic salt nor the REGI was added with cyanide. In the production process, the salt content of the cyanate bath control requirements (CNO ~ -) 33 ~ 38%, cyanide (CN ~ -) <2.5 ~ 3%. To deal with this in the 24h, the general need to add 0.6 ~ 0.8% REGI, then the salt bath volume unchanged.