HIPコーティングによる高硬度合金層の形成技術とその特性
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概要
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Some components of power plant suffer severe abrasion by sliding. Normally, in order to improve abrasion-resistant of the components, alloys with high hardness are welded on the components surface. However, after the welding, the grain size of the welded metal tends to be large, and toughness tends to be low. When the components are required not only high hardness but also high toughness, the grain size of the welded metal should be small.Considering that the fine microstructure can be formed by applying the HIP coating, we developed a new technology which can form a hard surface layer with higher mechanical properties such as high hardness and high toughness compare with PTA welding layer. As a new coating technology for surface hardening, it is expected to be a more effective technology than that of welding.