国产普通话对白呻吟在线播放-国产片在线免费观看-国产片在线看-国产片在线-日韩亚洲第一页-日韩亚洲成a人片在线观看

Your current location:Home > News & Letters > Welding knowledge

Composition and function of welding rod and selection principle of welding rod

2017-11-27
4868
Source:Original
  The electrode is composed of a metal core and coating consists of two parts, the main role is as the core electrode and filler metal; coating is the main function of the arc stability, protection, deoxidization, alloying and improve welding process.
  Basic principles of electrode selection:
  1) equal strength principle, that is, to choose the electrode with the same strength grade as base metal. Generally used for welding low carbon steel and low alloy steel.
  2) the principle of the same composition is to select the electrode with the same or similar chemical composition as the base metal. Generally used for welding heat-resistant steel, stainless steel and other metal materials.
  3) the principle of crack resistance should be chosen for the basic electrode with good crack resistance, so as to avoid cracks in the joint during welding and use. Generally used for welding structure with large rigidity, complex shape and dynamic load in use.
  4) the principle of anti porosity is limited by the welding process conditions, such as the oil and rust in the joints of butt welding parts, so the acid electrode with strong anti porosity ability should be selected to avoid the gas remaining in the weld during the welding process and form pores.
  5) low cost principle, in the premise of meeting the use requirements, as far as possible to choose good process performance, low cost and high efficiency of welding rod
More+

Recommend news

+86-731 8465 0818
主站蜘蛛池模板: 欧美人与性动交a欧美精品| 国内精品久久久久影院不卡| 欧美精品色精品一区二区三区| 国产一在线| 久草综合在线| 日本国产在线观看| 国产精品手机视频一区二区| 热re91久久精品国产91热| 香港经典a毛片免费观看…伊人色综合久久 | 日本高清一区二区三区不卡免费| 欧美久久久久久久一区二区三区| 精品日韩一区二区三区视频| 日韩欧美视频| 不卡一区二区三区四区| 欧美综合视频| 欧美夜夜爽| 欧美人善交| 欧美gv在线| 国产a国产片| a黄网站| 久久国产经典| 成人a区| 国产日韩一区二区三区在线观看| 国产精品1区2区| 亚洲第七页| 亚洲欧美综合| 亚洲精品高清在线观看| 国产在线视频网| 日韩欧美亚洲综合一区二区| 亚洲国产精品视频| 2022国产91精品久久久久久 | 91久久精品国产91性色tv| 日韩视频在线观看一区二区| 国产欧美日韩在线观看| 全免费a级毛片免费毛视频| 成人在线视频一区| 亚欧成人毛片一区二区三区四区| 欧美国产第一页| 亚洲精品综合久久中文字幕| a天堂专区一区二区三区| 亚洲精品在线第一页|