Method for controlling the microstructure of a laser metal formed hard layer
It is disclosed a method of applying a coating with a controlled laser metal forming process. A light source with a specific power and a signal capturing apparatus is moved over an article to form locally a melt pool on the surface of the article to which a coating powder is injected. An optical sig...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
27.04.2010
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| Online Access | Get full text |
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| Summary: | It is disclosed a method of applying a coating with a controlled laser metal forming process. A light source with a specific power and a signal capturing apparatus is moved over an article to form locally a melt pool on the surface of the article to which a coating powder is injected. An optical signal is captured from the melt pool, and the monitored optical signal is used for the determination of the temperature and temperature fluctuations of the melt pool. Furthermore, a control system is used to adjust at least one process parameter such as the power of the light source to obtain desired melt pool properties. Subsequently the melt pool solidifies. The high degree of control over the microstructure provides an efficient tool for generating laser metal formed hard coatings with optimised wear properties. |
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