Plasma Arc Welding for Code Compliance Nuclear Applications

2020 ◽  
Author(s):  
Dongmei (Donna) Sun ◽  
Rob Pistor
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Nuclear Industry ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Hot Wire ◽  
Weld Overlay ◽  
Nuclear Component ◽  
Wire Feeding ◽  
Code Compliance

Abstract Plasma Arc Welding (PAW) has been used for many critical applications due to its flexibility, reliability and high weld quality. In this paper, two code compliance plasma arc welding applications in the nuclear industry are discussed. The first application is an innovative welding process using PAW with specially designed dual hot wire feeding system, namely Dual Hot Wire Gas Metal Plasma Arc Welding (GMPAW). The GMPAW process offers unique advantages for high deposition and low dilution weld overlay application. The second application is a remote weld overlay repair from pipe inside diameter (ID) for a highly radiated nuclear component using PAW process with remote machining and NDE capability. In this paper, the benefits and advantages are provided for the aforementioned PAW applications. The versatility of plasma arc welding system configuration, as well as high quality and productivity can make plasma arc welding a good candidate for many critical code compliance applications.

Determining Keyhole Stability for Plasma Arc Welding Process Control

1999 ◽  
Author(s):  
Shaobin Zhang ◽  
YuMing Zhang
Keyword(s):  
Arc Welding ◽  
Imaging System ◽  
Welding Process ◽  
The State ◽  
Stability Factor ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Upper Limit ◽  
The Stability ◽  
Burn Through

Abstract Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing burn-through is approximately fixed for given applications. Hence, in this study, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and burn-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.

Plasma arc welding: Process variants and its recent developments of sensing, controlling and modeling

2016 ◽  
Vol 23 ◽  
pp. 315-327 ◽  
Author(s):  
Zu Ming Liu ◽  
ShuangLin Cui ◽  
Zhen Luo ◽  
ChangZhen Zhang ◽  
ZhengMing Wang ◽  
...  
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Process Variants ◽  
Recent Developments ◽  
Arc Welding Process

A Perspective Review on Estimation of Keyhole Profile during Plasma Arc Welding Process

2018 ◽  
Vol 5 (2) ◽  
pp. 6345-6350 ◽  
Author(s):  
Benjamin Das ◽  
N. Yadaiah ◽  
Rupshree Ozah ◽  
Sohini Chowdhury ◽  
Arpan Kumar Mondal ◽  
...  
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Arc Welding Process

System identification of controlled pulse keyhole plasma arc welding process

2012 ◽  
Vol 25 (6) ◽  
pp. 1274-1280
Author(s):  
Chuanbao Jia ◽  
Yongpeng Du ◽  
Ning Guo ◽  
Fang Wang ◽  
Yanfei Han
Keyword(s):  
System Identification ◽  
Arc Welding ◽  
Welding Process ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Arc Welding Process
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