在含强烈形成碳化物元素的低碳钢的γ→α转变过程中,合金碳化物常常呈现线列状形态。Honeycombe及其合作者研究了一系列三元合金钢,提出了这类碳化物“相间沉淀”机制,并运用薄晶体透射电镜法,采取具有大倾转角的试样台将渐次分布在二维界面上的碳化物相对于入射电子束倾斜,使碳化物表现出二维带状特征。Purdy在超高压透射电镜中,对1%Mo,0.4%C钢进行了原位动态观察,进一步证实 During the γ → α transformation of low carbon steels with strongly formed carbide elements, the alloy carbides often appear in a line-like configuration. Honeycombe and his collaborators have studied a series of ternary alloy steels and proposed the “intergranular precipitation” mechanism of these carbides. Using thin-crystal transmission electron microscopy, a specimen stage with a large tilting angle is gradually distributed over a two-dimensional interface The carbide is tilted with respect to the incident electron beam so that the carbide exhibits a two-dimensional band-like characteristic. Purdy in the ultrahigh pressure transmission electron microscopy, 1% Mo, 0.4% C steel in situ dynamic observation, further confirmed