核電廠管件用鋼-SUS 316L覆銲 INCONEL 82超合金之可行性評估

Microstructural Characteristics and the Evolution of Inconel 82 Alloy Cladding on SUS 316L Stainless Steel Using the GTAW Process

本研究以惰性氣體鎢極電弧銲接 （GTAW），分別將Inconel 52M及Inconel82合金被覆於SUS 316L不銹鋼上，並觀察SUS 316L與被覆層之間的銲接形貌、微觀組織及機械性質，並探討Inconel 82合金取代Inconel 52M 合金作為SUS 316L被覆層的可行性。實驗結果顯示，相較於 SUS 316L不銹鋼上被覆4層Inconel 52M 與Inconel 82 合金之機械性質無論是微硬度及抗拉強度都以Inconel 82 合金優於Inconel 52M合金，主要在於銲後的顯微組織所造成，在彎曲試驗部份，施銲後的側彎品質，並無裂紋產生為合格之銲接，其延展性皆超過25%以上，故被覆Inconel 82合金是可取代被覆Inconel 52M合金。

This study used the Inconel 52M and Inconel 82 alloys to clad SUS316L stainless steel, using gas tungsten arc welding (GTAW). The morphology,microstructure, and mechanical properties of the interface werethen analyzed to evaluate the feasibility of replacing the Inconel 52M withInconel 82. The results demonstrate that both the hardness and tensilestrength of the 4-layer Inconel 82 alloy on SUS 316L are superior to thoseof the Inconel 52M alloy. In a bending test of the Inconel 82 alloy, nocracks were generated and ductility exceeded 25%. These results demonstratethe practicality of replacing the Inconel 52M alloy with the Inconel82 alloy.