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具有铸造取向的定向凝固高温合金,要测定其柱状晶的位向关系,通常是用X射线劳厄法.但是,一方面由于测定方法比较麻烦,另一方面当柱状晶较细时,X光束不能精确地射在单个柱状晶上,这样得到的劳厄花样给最后的分析工作带来一定的困难.应用晶体位向腐蚀坑技术,给合金的研究提供了有利的条件.较早期的工作是用蚀坑法测定硅钢的晶体取向,最近,吴连生通过蚀坑腐蚀法对断口形貌与晶体位向关系在不同钢种中作了一系列的研究.本文介绍一种蚀坑腐蚀剂,能有效地显示定向凝固高温合金DZ9,
Directional solidification superalloys with cast orientation, to determine the orientation of the columnar crystal, usually by X-ray Laue method However, the determination of the method because of the more cumbersome, on the other hand, when the columnar crystal thinner, X-ray Can not be accurately shot on a single columnar crystal, the resulting Laue pattern to the final analysis of the work to bring some difficulties.Using the crystal orientation corrosion pits technology, alloy research provides the favorable conditions. Earlier work is Recently, Wu Liansheng made a series of researches on the relationship between fracture morphology and crystal orientation by using pit etching method in different steel grades.In this paper, we introduce a kind of pitting pit etchant, which can effectively Show directional solidification superalloy DZ9,