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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제4권 제1호
발행연도
1990.06
수록면
101 - 109 (9page)

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The friction welding has more techanical and economic advantages than the other welding processes. As this welding process has the characteristics such as curtailment of production time, materials, cost reduction, etc., it has been widely used in production of various mechanical components which have complex shapes.
So, this paper deals with optimizing the friction welding conditions and analyzing various mechanical properties of the friction welded joints of torsion bar material SUP9A bar to bar.
The results obtained are summarized as follows ;
1) The quantitative relation between heating time(t₁, sec) and total upset(U, ㎜) can be obtained. The empirical formula obtained is ; U=3.29 t₁+1.6
2) The tensile strength(σ<SUB>t</SUB>, ㎏f/㎟) of friction welding joints as post weld heat treated (PWHT) depends upon heating time(t₁, sec) quantitatively and the empirical formula obtained is ; σ=-5.1 t<SUP>2</SUP><SUB>1</SUB>+44.90 t₁+45.2
3) It is certain that the optimum condition for friction welded joints of SUP9A steel bars of diameter 14.5㎜ is, considering on various properties such as tensile strength, torsional strength, impact energy and strain of the joints after PWTH ; n=2000rpm, P₁=8㎏f/㎟, P₂=20㎏f/㎟, t₁=4sec, t₂=3sec
4) The tensile strength, torsional strength and hardness were increased with the increasing carbon equivalent, but toughness was decreased.

목차

Abstract
1. 緖論
2. 試驗片 및 實驗方法
3. 結果 및 考察
4. 結論
附記
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