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Characterization of complex (B + C) diffusion layers formed on chromium and nickel-based low-carbon steel

机译：铬和镍基低碳钢上形成的复杂（B + C）扩散层的表征

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Combined surface hardening with boron and carbon was used for low-carbon chromium and nickel-based steels. The microstructure, boron contents, carbon profiles and chosen properties of borided layers produced on the carburized steels have been examined. These complex (B + C) layers are termed borocarburized layers, The microhardness profiles and wear resistance of these layers have been studied. In the microstructure of the borocarburized layer two zones have been observed: iron borides (FeB + Fe2B) and a carburized layer. The depth (70-125 mum) and microhardness ( 1500-1800 HV) of iron borides zone have been found. The carbon content (1.2-1.94 wt.%) and microhardness (700-950 HV) beneath iron borides zone have been determined. The microhardness gradient in borocarburized layer has been reduced in comparison with the only borided layer. An increase of distance from the surface is accompanied by a decrease of carbon content and microhardness in the carburized zone. The carbon and microhardness profiles of borided, carburized and borocarburized layers have been presented, A positive influence of complex layers (B + C) on the wear resistance was determined. The wear resistance of the borocarburized layer was determined to be greater in comparison with that for only borided or only carburized layers. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 14]
机译：低碳铬和镍基钢使用了硼和碳的联合表面硬化处理。检查了渗碳钢上产生的硼化层的微观结构，硼含量，碳分布和所选性能。这些复杂的（B + C）层称为硼化碳层，已经研究了这些层的显微硬度分布和耐磨性。在硼碳共渗层的微观结构中，观察到两个区域：硼化铁（FeB + Fe2B）和渗碳层。已发现硼化铁区域的深度（70-125微米）和显微硬度（1500-1800 HV）。确定了硼化铁区域下方的碳含量（1.2-1.94 wt。％）和显微硬度（700-950 HV）。与仅硼化层相比，硼碳共渗层中的显微硬度梯度降低了。与表面距离的增加伴随着渗碳区碳含量和显微硬度的降低。提出了渗硼，渗碳和硼碳共渗层的碳和显微硬度分布，确定了复合层（B + C）对耐磨性的积极影响。与仅渗硼层或仅渗碳层相比，硼碳共渗层的耐磨性被确定为更高。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：14]

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