A surface compound treatment with liquid nitrocarburizing and steam treatment,named special bluing,was carried out on the tappets of TBD234 series diesel engine.

• 采用特殊发蓝(液体氮碳共渗+蒸汽处理)表面复合处理的方法,对TBD234系列柴油机挺柱进行工艺试验及分析,并与进口件进行了对比。