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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.2
- 수록면
- 58 - 64 (7page)
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The following results were obtained, microstructures and tensile properties in arc brazed joints of DP(dual phase) steel using Cu-5.3wt%Sn insert metal was investigated as function of brazing current.
1) The Fusion Zone was composed of αFe+γCu and Cu23Sn2. The reason for the formation of these solid solutions. Despite, Fe & Cu were impossible to solid solution at room temperature. It’s melting & reaction to something of insert metal & Base Metal (DP Steel) by Arc. Brazing Process has faster cooling rate then Cast Process, Supersaturated solid solution at room temperature. 2) The increase Hardness of Fusion Zone was directly proportional to the rise of welding current. Because, αFe+γCu phase (higher hardness than the Cu23Sn2.(104.1Hv ＜ 271.9Hv)) Volume fraction was Growth, due to increasing the amount of base metal melting by High current. 3) The results of tensile shear test by Brazing, All specimens happen to fracture in Fusion Zone. On the other hand, when Brazing Current increasing tend to rise tensile load. but it was very small, about 26-30% of the base metal. 4) The result of fracture analysis, The crack initiate at Triple Point for meet to Upper B.M/Under B.M/Fusion Zone. This Crack propagated to Fusion zone. So ruptured by tensile strength. The Reason to in the fusion zone fracture, Fusion zone by Brazing of hardness (strength) was very lower then the base metal (DP steel). In addition the Fusion Zone’s thickness in triple point was thin than the base metal’s thickness in triple point.
1) The Fusion Zone was composed of αFe+γCu and Cu23Sn2. The reason for the formation of these solid solutions. Despite, Fe & Cu were impossible to solid solution at room temperature. It’s melting & reaction to something of insert metal & Base Metal (DP Steel) by Arc. Brazing Process has faster cooling rate then Cast Process, Supersaturated solid solution at room temperature. 2) The increase Hardness of Fusion Zone was directly proportional to the rise of welding current. Because, αFe+γCu phase (higher hardness than the Cu23Sn2.(104.1Hv ＜ 271.9Hv)) Volume fraction was Growth, due to increasing the amount of base metal melting by High current. 3) The results of tensile shear test by Brazing, All specimens happen to fracture in Fusion Zone. On the other hand, when Brazing Current increasing tend to rise tensile load. but it was very small, about 26-30% of the base metal. 4) The result of fracture analysis, The crack initiate at Triple Point for meet to Upper B.M/Under B.M/Fusion Zone. This Crack propagated to Fusion zone. So ruptured by tensile strength. The Reason to in the fusion zone fracture, Fusion zone by Brazing of hardness (strength) was very lower then the base metal (DP steel). In addition the Fusion Zone’s thickness in triple point was thin than the base metal’s thickness in triple point.
목차
Abstract
1. 서론
2. 실험방법
3. 실험결과 및 고찰
4. 결론
참고문헌
참고문헌 (15)
참고문헌 신청
1. [학술지(정기간행물)] - Y. Sakuma / 1991 / / Metall. Mater. Trans. A 22A : 489 ~
2. [학술지(정기간행물)] - D. B. Im / 2000 / / J. Kor. InsTR1000 of Met. & Mater. 38 : 3 ~
3. [학술지(정기간행물)] - QYOU.X / 2007 / Ultra-Pure Ferritic Stainless Steels-Grade, Refining, Operation, and Application / Journal of Iron and Steel Research, International 14 (4) : 24 ~
4. [학술지(정기간행물)] - J.K.Kim / 2009 / Intergranular corrosion of Ti-stabilized 11wt% Cr ferritic stainless steel for automotive exhaust systems / Corrosion Science : 2716 ~
5. [학술지(정기간행물)] - E. Taban / 2009 / Laser welding of modified 12% Cr stainless steel : Strength, fatigue, toughness, microstructure and corrosion properties / Materials and Design : 1193 ~
2. [학술지(정기간행물)] - D. B. Im / 2000 / / J. Kor. InsTR1000 of Met. & Mater. 38 : 3 ~
3. [학술지(정기간행물)] - QYOU.X / 2007 / Ultra-Pure Ferritic Stainless Steels-Grade, Refining, Operation, and Application / Journal of Iron and Steel Research, International 14 (4) : 24 ~
4. [학술지(정기간행물)] - J.K.Kim / 2009 / Intergranular corrosion of Ti-stabilized 11wt% Cr ferritic stainless steel for automotive exhaust systems / Corrosion Science : 2716 ~
5. [학술지(정기간행물)] - E. Taban / 2009 / Laser welding of modified 12% Cr stainless steel : Strength, fatigue, toughness, microstructure and corrosion properties / Materials and Design : 1193 ~
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