금합금과 Ni-Cr 합금의 납착부 인장강도
Tensile bond stregth of solder joint betweenn gold alloy and nickel-hromium alloy
정준오, 최현미, 최정호, 안승근, 송광엽, 박찬운,
소속 상세정보
정준오 ( Jeong Jun-Oh ) - 전북대학교 치과대학 치과보철학교실
최현미 ( Choi Hyeon-Mi ) - 전북대학교 치과대학 치과보철학교실
최정호 ( Choi Jeong-Ho ) - 전북대학교 치과대학 치과보철학교실
안승근 ( Ahn Seung-Geun ) - 전북대학교 치과대학 치과보철학교실
송광엽 ( Song Kwang-Yeob ) - 전북대학교 치과대학 치과보철학교실
박찬운 ( Park Charn-Woon ) - 전북대학교 치과대학 치과보철학교실
KMID : 0362419960340010143
Abstract
The purpose of this study was to evaluate the tensile strength of solder joint between gold alloy and nickel-chromium alloy. The specimens were made with type III gold alloys and Ni-Cr-Be alloy and Degular Lot 2 solder. Eighteen paired specimens were made, and subdivided into three groups. Group I specimens were gold alloy-gold alloy combination, Group II specimens were gold alloy-Ni-Cr alloy combination, Group III specimens were Ni-Cr alloy-Ni-Cr alloy combination. Solder block were made with solder investment(Degussa A,G, Germany) and stored in room temperature for 24 hours. To reduce the formation of metallic oxide and increase wetting properties, flux was used before preheating and soldering procedure. The specimens were preheated at 650℃ and flux were applied again and gas-oxygen torch was used to solder the specimen. All soldered specimens were subjected to a tensile force in the Instron universal testing machine : the crosshead speed was 1 mm/min. @ES Tensile strength values of three soldered joint groups were @EN 1. Gold alloy-Gold alloy solder joint : 48.8 kg/㎟ 2. Gold alloy -Ni-Cr alloy solder joint : 30.9 kg/㎟ 3. Ni-Cr alloy -Ni-Cr alloy solder joint : 31.8 kg/㎟ The microscopic examination of fracture site showed cohesive and combination fracture modes in gold alloy specimens, but showed all adhesive fracture modes in Ni-Cr alloy containing specimens.
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