|
Abstract: The laser cladding form is a new rapid prototyping
technology. It combines the rapid prototyping with the laser cladding.
It has the advantages of both rapid prototyping and laser cladding. The
components formed by laser cladding possess the characteristics of
complex shapes and excellent compositions. The micro-cracks produced in
laser cladding form is a very important problem to be solved. The
differences between laser cladding form and laser cladding are analyzed
and the breakthrough point to reduce and eliminate the micro cracks is
found. It is the substrate material. The influence on micro-cracks of
different substrate materials is experimentally researched and the
experimental samples are obtained. The conclusion that in the conditions
of selecting propriety substrate material, propriety preheating
temperature and propriety alloy powder can be obtained, the micro-cracks
produced in laser cladding form can completely be reduced and
eliminated.
Key words: Laser cladding forming Metal components Micro-cracks
CLC No: TN24
航空科学基金(97Z53002)、华中科技大学模具技术国家重点实验室基金(01-5)和上海交通大学科技基金资助项目. Received 20020830,
received in revised form 20021010
|