Transactions of Materials and Heat Treatment

Title：Study on surface hardending of heat-resistant layer Ni60-WC of hot forging die

Authors： Liu Xu Ma Weijin Wang Hongfu Wang Huachang

Unit： North University of China Wuhan University of Technology

KeyWords： hot forging die surface hardening microhardness heat-resistant layer Ni60-WC

ClassificationCode：TG316；TG174

year,vol(issue):pagenumber：2014,39(6):94-97

Abstract：

The cavity surface of hot forging die was strengthened with cladding layer of Ni60-WC cermet. The cermet powder was mixed with three proportions, 70%/30%, 80%/20% and 90%/10%. Plasma spray, plasma remelting and spray welding were used in the experiment to test the three proportions of powers and analyze their microhardness, coefficient of thermal expansion, specific heat capacity and thermal conductivity. During the experiment, the spray welding sample shows the highest microhardness, then the plasma spray and the spray welding show the lowest one. The microhardness of cladding layer becomes higher when WC proportion increases. The spray welding sample shows the best thermophysical property and pore rate in the three treatments. The experiment shows that 30%WC powder together with the spray welding method is the best for the cavity surface strengthening of hot forging die.

Funds：

国家自然科学基金资助项目（50675165）

Reference：

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