熱均壓擴散接合異質鎳基超合金之介面組織及接合性能研究

The Research of Hot Isostatic Pressing Diffusion Bonding on Interface Structure and Bonding Properties for Hybrid Structure Nickel-base Superalloys

廖健鴻(J.H. Liao) ； 陳思漢(S.H. Chen) ； 薄慧雲(H.Y. Bor) ； 倪國裕(G.Y. Ni) ； 魏肇男(C.N. Wei) ； 林於隆(Y.L Lin) ； 鄭文興(V.S. Jeng)

《鑄造工程學刊》 42卷1期 (2016/03) Pp. 15-23

摘要

本研究是以熱均壓方式進行等軸晶與單方向晶之二種異質鎳基超合金之固態擴散接合，及其對接合介面組織及接合性能之研究。實驗結果顯示熱均壓擴散接合介面處結構緻密性，γ相基地及γ’析出強化相皆呈完整原子與原子間之擴散接合狀態。在室溫拉伸時，等軸晶的強度會高於單方向晶材料，材料會在單方向晶端斷裂。在760℃拉伸時，單方向晶的強度會高於等軸晶材料，故材料會在等軸晶端斷裂。

關鍵字

超合金 ； 等軸晶 ； 單方向晶 ； 擴散接合 ； 熱均壓

並列摘要

Solid-state diffusion bonding of a equiaxed grain Ni-based superalloy to a directional solidified columnar grain Ni-based superalloy was carried out through hot isostatic pressing and the interface structure and properties of the joint were investigated. The results showed that the structure of bonding interface was highly dense and the γ matrix and γ’ phase were bonding perfectly by the diffusion between atom to atom. The results of room-temperature tensile tests showed that the strength of equiaxed grain was higher than directional solidified columnar grain and the fracture was on the side of directional solidified columnar grain. In 760℃ tensile tests, the strength of directional solidified columnar grain was higher than that of equiaxed grain, resulting in the fracture was on the side of equiaxed grain.

並列關鍵字

superalloy ； equiaxed grain ； directional solidified columnar grain ； diffusion bonding ； hot isostatic pressing