钛合金激光快速成形缺陷原因分析

Cause analysis on defects of titanium alloy laser rapid forming

在金属粉末激光快速成形过程中,由于工艺参数、设备性能和材料特性等原因,会引起成形零件产生各种缺陷或不足。其中由送粉精度所致的成形尺寸精度和表面粘粉是2个主要的成形缺陷。通过试验分析可知:由送粉延迟引起的欠堆积或过堆积是影响成形尺寸精度的主要原因之一;表面粘粉程度主要受比能量的影响。

In the process of metal powder laser rapid forming,various defects may be caused in forming parts on account of technics parameters,equipment performance,material characteristics and other factors,while forming dimensional accuracy and surface sticky powder caused by powder feeding accuracy are the two major defects of forming parts.By the test analysis,lacking or excessive accumulation resulting from powder feed delay is one of the main reason of affecting the forming dimensional accuracy,and the main reason which affects the happening of surface sticky powder is specific energy.