박성옥
2009-02-23 13:15:48
2
786
동(구리선)선 용접시 사용할 tig 용접봉은 어떤것을 사용합니다.
지금은 wt20 (토륨20% 텅스텐봉)하고 , 3상교류 용접기계에서 작업합니다.
순텅스텐봉 사용은 어떤지요?
지금은 wt20 (토륨20% 텅스텐봉)하고 , 3상교류 용접기계에서 작업합니다.
순텅스텐봉 사용은 어떤지요?
I believe you have a good answer from Mr.Lee.
I have a question whether your main concern is for the welding filler metal (용접봉) or tungsten electrode (전극).
Why don’t you find the followings for GTAW of copper alloys?
ASME Sec. II, Part C, SFA-5.12 for tungsten electrodes.
ASME Sec. II, Part C, SFA-5.7 for welding filler metal.
You may also be able to refer the below.
; 은정철 (Thomas Eun), 실용 용접재료와 코드, Chapter 1.3 & 2.1, (도) 대신기술, 2000
I have a question whether your main concern is for the welding filler metal (용접봉) or tungsten electrode (전극).
Why don’t you find the followings for GTAW of copper alloys?
ASME Sec. II, Part C, SFA-5.12 for tungsten electrodes.
ASME Sec. II, Part C, SFA-5.7 for welding filler metal.
You may also be able to refer the below.
; 은정철 (Thomas Eun), 실용 용접재료와 코드, Chapter 1.3 & 2.1, (도) 대신기술, 2000
공지사항
토륨이 조금 들어간 것이 Arc의 안정성 측면에서 더 유리합니다.
그렇기에 가장 널리 사용되는 것이지요.
물론 엄격한 품질이 요구되지 않는 곳이라면 Pure Tungsten을 쓸 수 있습니다. 가격도 싸고, 그럭저럭 범용으로 쓸만은 합니다.
Tungsten을 굳이 구분하면 다음과 같이 구분됩니다.
Pure Tungsten (AWS EWP) Color Code: Green Used for less critical applications. The cost is low and they give good results at relatively low currents on a variety of metals. Most stable arc when used on AC, either balanced wave or continuous high frequency.
1% Thoriated Tungsten (AWS EWTh-1) Color Code: Yellow Good current carrying capacity, easy arc starting and provide a stable arc. Less susceptible to contamination. Designed for DC applications of nonferrous materials.
2% Thoriated Tungsten (AWS EWTh-2) Color Code: Red Longer life than 1% Thoriated electrodes. Maintain the pointed end longer, used for light gauge critical welds in aircraft work. Like 1%, designed for DC applications for nonferrous materials.
5% Thoriated Tungsten (AWS EWTh-3) Color Code: Blue Sometimes called "striped" electrode because it has 1.0-2.0% Thoria inserted in a wedge-shaped groove throughout its length. Combines the good properties of pure and thoriated electrodes. Can be used on either AC or DC applications.
Zirconia Tungsten (AWS EWZr) Color Code: Brown Longer life than pure tungsten. Better performance when welding with AC. Melts more easily than thoriam-tungsten when forming rounded or tapered tungsten end. Ideal for applications where tungsten contamination must be minimized.