国产IGAO视频网在线观看,国产成人久久精品激情,四虎精品免费永久免费视频,精品国产男人的天堂久久

常熟國強和茂管材有限公司

Sinupower Heat Transfer Tubes Changshu Ltd.
CN EN

400-100-7068

+ 微信號:WEIXINHAOMA

Your location : Home > News > Industry Dynamics

What are the heat treatment methods for precision aluminum tubes?

Source:en      Release date: 2022-05-17
Information summary:The precision aluminum tube is heated by different heat sources, and cooled when the surface temperature of the workpiece reaches above the critical point, so that the surface layer obtains a hardened structure while the core still maintains the original structure. The most common industrial applications are induction heating and flame heating surface quenching
1. Surface quenching
          heats the precision aluminum tube through different heat sources, and cools it when the surface temperature of the workpiece reaches above the critical point, so that the surface layer obtains a hardened structure while the core still maintains the original structure. The most common industrial applications are induction heating and flame heating surface quenching.
          2. Chemical heat treatment
          The product is heated and kept warm in a medium containing active elements, so that the active atoms in the medium penetrate into the surface of the product or form a covering layer of a certain compound to change the structure and chemical composition of the surface layer, so that the surface of the workpiece Has mechanical or physicochemical properties.
          3. Contact resistance heating and quenching
          : A voltage of less than 5 volts is applied to the precision steel pipe through the electrode, and a large current flows through the contact between the electrode and it, and a large amount of resistance heat is generated, so that the surface is heated to the quenching temperature, and then the electrode is heated to the quenching temperature. Removed, the heat is introduced into the product and the surface is cooled, that is, the purpose of quenching is obtained.
          4. Electrolytic heating and quenching
          is placed in the electrolyte of acid, alkali or salt aqueous solution, the product is connected to the cathode, and the electrolytic cell is connected to the anode. After the direct current is turned on, the electrolyte is electrolyzed, oxygen is released on the anode, and hydrogen is released on the precision steel pipe. Hydrogen forms a gas film around the product and becomes a resistor body to generate heat, heat the surface to the quenching temperature, and then cut off the power, the gas film disappears, and the electrolyte becomes a quenching medium, which cools and hardens the surface.
双腿张开被9个黑人调教影片| 放荡开放的人妻穿丁字裤凹| 国产9 9在线 | 中文| 欧美日韩人妻精品一区二区在线 | 影音先锋女人aa鲁色资源| 啦啦啦免费视频播放| 福利姬国产精品一区在线| 欧美伦费免费全部午夜最新| 女人被男人躁得好爽免费视频| 久久午夜无码鲁丝片秋霞| 成人区人妻精品一区二区不卡| 18禁超污无遮挡无码免费游戏| 大陆极品少妇内射aaaaaa| 老太脱裤让老头玩ⅹxxxx| 少妇性俱乐部纵欲狂欢少妇| 亚洲av无码国产剧情| 久久精品国产亚洲av蜜臀| 国产绳艺sm调教室论坛| 精选国产av精选一区二区三区| 在线 | 一区二区三区四区| 边喂奶边中出的人妻| 国产一卡2卡3卡4卡网站免费 | 成全电影大全在线播放| 亚洲av无码久久寂寞少妇| 放荡开放的人妻穿丁字裤凹| 成人欧美一区二区三区| 97久久精品人人澡人人爽| 久久久国产精华液| 乱公和我做爽死我视频| 久久综合88熟人妻| 亚洲午夜精品久久久久久浪潮 | 国产高潮国产高潮久久久| 欧美bbw极品另类| 亚洲精品乱码久久久久久| www国产精品内射熟女| 欧美jizzhd精品欧美| 女人另类牲交zozozo| 欧美性猛交xxxx黑人猛交| 吸咬奶头狂揉60分钟视频| 四虎影视一区二区精品| 亚洲免费在线观看|