二、焊接工艺的进展 1、埋弧焊美国韦米勒氏对埋弧焊的前景作了如下估计:美国1936年开始采用埋弧焊用于焊接厚板,二次大战期间发展迅速,主要是制造舰船、坦克。五十和六十年代埋弧焊继续发展,七十年代初由于气保焊和药芯焊丝的普及,一度转入低潮;但八十年 Second, the progress of the welding process 1, submerged arc welding Weimillesi on the prospects for submerged arc welding made the following estimates: The United States began in 1936 with submerged arc welding for the welding plate, the rapid development during World War II, mainly Manufacture of ships, tanks. Submerged arc welding continued its development in the 1950s and 1960s. At the beginning of the seventies, gas welding and flux cored wire spread to low ebb;