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本文通过对不同成分的钢试样,在不同的工艺条件下,化学气相沉积TiC 后的表面形态,显微组织及其变化的研究,提出了这种材料保护涂层的形成机理。通过对TiC 涂层与基体之间的过渡区组织的研究,论证了予先C-N 共渗,可以提高涂层与被保护材料基体的结合力这一观点。本项试验研究,对延长涂层使用寿命,进一步扩大TiC 化学气相沉积的实际应用等方面有所帮助。
In this paper, the formation mechanism of the protective coatings on the steel samples with different compositions, surface morphology, microstructure and their changes under different process conditions, chemical vapor deposition TiC was proposed. Through the study of the transition zone between the TiC coating and the matrix, it is demonstrated that pre-C-N co-permeation can improve the bonding between the coating and the substrate to be protected. This experimental study, to extend the service life of the coating, to further expand the practical application of TiC chemical vapor deposition and other aspects of help.