美女激情av_欧美成人精品二区三区99精品_五月天婷婷狠狠_91精品国产综合久久精品_天堂在线一区_日日骚网

Classification of brazing materials

Source: ZheJiang Yongwang Welding Materials Co.,tldRelease time: 2021-12-09

1. According to the melting temperature range of brazing materials

(1) Brazing materials with melting point lower than 450℃ are called soft brazing materials such as crop-based, tin-based, lead-based, zinc-based alloys.

(2) The brazing material with melting point higher than 450`C is called hard brazing material (commonly known as refractory brazing material) such as aluminum-based, copper-based, silver-based, manganese-based, gold-based, nickel-based and other alloys.

2. According to the main alloying elements of brazing materials

According to its main alloying elements, brazing materials can be divided into silver-based, copper-based, tin-based, lead-based, aluminum-based brazing materials.

3. According to the shape of brazing material

According to its shape, brazing material can be divided into wire, rod, sheet, foil, powder or special shape brazing material (such as ring brazing material or paste brazing material, etc.).

4. According to whether the brazing agent needs to be added at the time of use

There are two types of brazing media: self brazing media and brazing media added. Self fluxing brazing alloy is a brazing material that can be brazed directly without the use of a brazing flux. It is a special kind of metal joining material. This type of brazing alloy contains elements that act as a brazing flux. There are two main types of self-fluxing brazing alloy: copper-phosphorus brazing alloy and copper-silver-phosphorus brazing alloy with phosphorus, and copper- and silver-based brazing alloy with lithium.

主站蜘蛛池模板: 日本三级精品视频 | 久久久久久久国产精品 | 91偷拍精品一区二区三区 | 亚洲美女精品视频 | 欧美国产精品一区二区 | 一级大毛片 | 中文字幕第一页在线 | 欧美一二区 | 黄色影视在线免费观看 | 日韩精品1区 | 18毛片 | 精品黄色 | 99久久婷婷国产精品综合 | 亚洲一区二区视频在线观看 | 欧美精品综合 | 国产成人99久久亚洲综合精品 | 亚洲国产精品一区二区三区 | 日本精品一区二区三区在线观看视频 | 久久男人网 | 国产精品一区二区视频 | 天天摸天天干 | 精品国产乱码一区二区三区四区 | 国产精品美女久久久久久久久久久 | 日韩国产欧美视频 | jlzzjlzz国产精品久久 | 不卡视频在线 | 丰满白嫩老熟女毛片 | 婷婷国产在线观看 | 国产黄色在线播放 | 一级片免费视频 | 91精彩视频在线观看 | 中文字幕视频在线观看 | 久久在线 | 欧美在线视频网 | 一本大道久久精品 | 欧美一级久久久 | 国产精品一区二区视频 | 久久久久久久av | 久久综合99 | 欧洲精品视频在线观看 | 久久中文字幕一区 |