2013年9月3日 · If a part has been cut off and you are reusing it there is very little 'old' weld there if it has been properly cleaned and prepped before the new work. At least, if done PROPERLY. This is really a call of the project engineer though.

2020年4月21日 · Read this article for a brief overview of welding history throughout the years. Welding can trace its historic development back to ancient times. The earliest examples of welding come from the Bronze Age. Small gold circular boxes were …

2023年8月22日 · Comparing old and new welding techniques offers insights into the craftsmanship, technology, and efficiency that shape our world. This article delves into this captivating comparison, exploring the differences, advantages, and drawbacks that each era of welding brings to the table.

Welding can be traced back over thousands of years, with archaeological evidence dating back to around 3,000 B.C. in Egypt and the eastern Mediterranean. These earliest forms of welding involved hammering two pieces of metal together under heat until they joined.

2009年11月4日 · You can go over a weld for repair without changing the size using GTAW. You can go over for many other reasons with other processes. BUT, are you covering something up?

http://www.WcWelding.com This old welding training movie is actually pretty good. It mainly shows oxy-acetylene welding, spot welding, arc welding, as well a...

2024年1月12日 · Ancient civilizations, such as the Egyptians and Greeks, worked metal with the discovery of copper, bronze, silver, gold, and iron, then metalworking later progressed to include steel. Gold ornaments made in the third century B.C …

Most other weld methods (Stick, TIG, MIG, Sub-src, etc) minimize this risk by shielding the weld area from contaminants, using fluxes that refine the contaminants out, having a slight natural reducing capacity (TIG), or a combination of these.

2019年3月11日 · The 1980’s and ’90s turned welding from an art to a science by advancements in robotic welding, on-board computers, state-of-the-art electrodes and mixing multiple exotic gases. Engineers began developing more exotic materials, driving the need for advanced electronics. Modern Welding

2025年1月25日 · Welding is a method of repairing or creating metal structures by joining the pieces of metals or plastic through various fusion processes. Generally, heat is used to weld the materials. Welding equipments can utilize open flames, electric arc or laser light. The earliest evidence of welding can be traced back to the Bronze Age.