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一、前言铝在其它金属(M)或合金表面合金化(亦称渗铝)之后,能形成由M-A1金属间化合物所构成的扩散层,给予金属表面某些新的特性,诸如:改变金属表面的组织和化学成份,增加硬度和提高其抗氧化的能力等。用铝使金属表面合金化的方法有:固体法、液体法和气体法。本文采用的是液体电解法。据文献[3][4]介绍,该方法获得的渗铝层质量高,渗层较均匀,不易剥落,而且渗铝后不需要热处理。目前,国内外对合金化的方法和合金化层的金相结构及其特性研究较多,而对合金化初期的沉积现象研究很少。本文作者对铝质点在工业纯铁表面上的沉积现象、长大过程和初期的相结构进行初步观察,并对某些现象用缺陷组织和能量观点进行了分析。
I. INTRODUCTION After alloying (also known as aluminizing) the surface of other metals (M) or alloys, aluminum can form a diffusion layer consisting of M-Al intermetallics that gives certain new properties to the metal surface such as: The metal surface of the organization and chemical composition, increase hardness and improve its antioxidant capacity. Methods of alloying the metal surface with aluminum include the solid method, the liquid method, and the gas method. This paper uses a liquid electrolyte method. According to the literature [3] [4] Introduction, the aluminized layer obtained by the method of high quality, more uniform layer, not easy to peel off, and after aluminizing does not require heat treatment. At present, there are many studies on the alloying method and alloying layer’s metallurgical structure and its properties both at home and abroad, but little research has been done on the initial deposition of alloying. The authors first observed the deposition phenomenon, growth process and initial phase structure of aluminum spot on the industrial pure iron surface, and analyzed some phenomena from the viewpoint of defect organization and energy.