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Prevention of seizure by nitride coating in multi-stage deep drawing of pure titanium sheets

机译：在纯钛薄板的多阶段深冲中通过氮化物涂层防止咬死

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摘要

Seizing in multi-stage deep drawing processes of pure titanium sheets was prevented by nitride coating. The nitride coating was performed by annealing pure titanium sheets in nitrogen atmosphere. The titanium substrate was not in direct contact with the die during the forming due to the existence of the nitride layer. The effects of die materials and lubricants on the occurrence of seizure in multi-stage deep drawing were examined. It was found that the nitride coating is effective in preventing the seizure in multi-stage deep drawing processes of pure titanium sheets. In addition, the surface roughness of the side wall of drawn titanium cups was improved by a deep drawing and ironing process in the final stage of forming.
机译：氮化涂层可防止纯钛板在多阶段深冲过程中发生咬合。通过在氮气气氛中对纯钛片进行退火来执行氮化物涂覆。由于存在氮化物层，因此钛基板在成型期间未与模具直接接触。研究了模具材料和润滑剂对多阶段深冲时咬合现象的影响。已经发现，氮化物涂层在防止纯钛板的多阶段深拉伸过程中的咬合方面是有效的。另外，在成形的最后阶段，通过深冲压和熨烫工艺可以改善拉制钛杯侧壁的表面粗糙度。

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