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1 前言低碳合金钢淬火后可获得板条马氏体组织,它是由许多成群的马氏体板条所组成,板条内有密度很高的位错。低碳合金钢的这种组织形态和亚结构使其具有高的强度和良好的塑韧性、因而在工程结构零件上得到了广泛的应用,并取得了明显的经济效益。如何进一步提高低碳马氏体的性能,充分发掘低碳(合金)钢的强韧性能潜力,是低碳马氏体研究的重要方面。国内外现已研究了多种强化低碳马氏体的方法。由于低碳马氏体具有良好的塑韧性,可对其实行冷变形来进一步提高性能,故近年来马氏体形变时效强化得到了相当地发展与广泛的重视。而对形变强化机制及影响因素尚存有不同观点。本文结合防滑链条和矿用圆环链等构件用钢,对低碳马氏体的冷拉伸形变强化效果及机理进行了试验研究。
1 Introduction Low-carbon alloy steel obtained after quenched lath martensite, which is composed of many groups of martensite lath, densities within the lamellae with high density. This kind of microstructure and sub-structure of low-carbon alloy steel makes it have high strength and good plasticity and toughness, so it has been widely used in engineering structural parts and achieved obvious economic benefits. How to further improve the performance of low carbon martensite and fully exploit the toughness potential of low carbon (alloy) steel is an important aspect in the research of low carbon martensite. At home and abroad have now studied a variety of ways to strengthen low-carbon martensite. As the low-carbon martensite has good plasticity and toughness, cold deformation can be carried out to further improve its performance. In recent years, martensitic deformation aging has been considerably developed and extensively valued. However, there are still different opinions on the mechanisms and influencing factors of deformation strengthening. In this paper, combined with non-skid chains and mine ring chain and other components of steel, low-carbon martensitic cold-stretch deformation strengthening effect and mechanism were studied.