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日本化学金属研究所的佐藤真三过去曾发表过镀钛氮化的工艺。即首先将钢件镀钛,再镀一层锌或在非氧化气氛中加热到150～400℃,使活性钛向钢内扩散,然后在600～700℃的氰化盐溶中氮化。据说该法比普通氮化法快40倍,1.5～2小时可获硬化层0.5毫米,扩散层2毫米。中低碳钢亦可得HV1000～1200,渗层不脆,有韧性。我国曾有不少单位试验过各色各样的加钛氮化,有一定效果,但不象佐藤所说的那样突出。不久前,佐藤又发表“电解氮化法”的文章,称之为“充满魅力的革新技术”。看来,未必会象佐藤吹嘘的那样“淬火,再见了”,但可能仍不失为比学热处理的一种新工艺。现将佐藤的两篇文章,删去其广告性的吹嘘,将实质性的内容编译如下,供读者参考。本文是两部份发表的,(一)“淬火,再见了”;(二)“不需要淬火钢,S35C足矣”。这种电解氮化技术的前身是镀钛氮化法,于1961年建立了实验室,开始进行研究工作。据说这种氮化技术既不是模仿,也不是局部的改革,它不是局限于一个时代的技术,对技术界将有深远的影响。该法具有不少优点,例如,可以用廉价的材料在短时间内生产出性能优异的产品,能用碳钢S35C稍加氮化费来代替合金工具钢与高速钢制造使用寿命长的工具。还说该氮化法对铸铁及铝合金也有显著的效果。下面分别介绍其效果、工艺及应用。
Sato Shinzo, Japan Institute of Chemical Metals has previously published a process of titanium plating and nitriding. That is, firstly, the steel is plated with titanium, then plated with zinc or heated in a non-oxidizing atmosphere to 150-400 DEG C to diffuse the active titanium into the steel and then nitrided in a cyanide salt solution of 600-700 DEG C; It is said that the method is 40 times faster than the normal nitriding method, 1.5 to 2 hours hardened layer can be 0.5 mm, diffusion layer 2 mm. Medium and low carbon steel also available HV1000 ~ 1200, the layer is not brittle, toughness. Many units in our country have experimented with various kinds of titanium nitride additions, which have certain effects but are not as prominent as Sato put it. Not long ago, Sato published an article titled “Electrolysis Nitriding,” calling it “a glamorous, innovative technology.” It seems, may not be like Sato bragging that “quenching, goodbye,” but may still be a new process than heat treatment. Now Sato’s two articles, delete its advertising boast, the substantive content compiled below, for readers reference. This article is published in two parts, (a) “quenching, goodbye”; (b) “does not require hardened steel, S35C enough.” This electrolytic nitriding technology is the predecessor of titanium plating nitriding method, in 1961 established a laboratory to begin research work. It is said that this nitridation technology is neither imitation nor partial reform, it is not limited to an era of technology, the technology sector will have a profound impact. This method has many advantages. For example, it is possible to produce high-performance products in a short period of time using inexpensive materials, and to use carbon steel S35C with a slight nitriding fee instead of alloy tool steel and high-speed steel to manufacture tools with long service life. Also said that the nitriding of cast iron and aluminum alloys also have significant results. The following describes the effect, technology and application.