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利用鋁热法焊接大断面的工件,如軌道、压延机轧滾等,性質特別优良;此种方法亦可用于焊接鋼架。所謂鋁热焊,就是用純鋁和氧化鉄的混合物,加热至1300℃时,发生化学反应,放出大量热能,温度达3000℃以上。用这种高温的熔化金屬和熔渣注入焊接处,焊件受高热熔化而結合起來。它此其他焊接方法簡單,質量均勻結实。 [鋁热剂原料的选擇和制造]为了获得質量优反的焊道,作为鋁热剂的原料要有一定的化学成分,否则就不易获得应有的效果。鋁热原料包括純鋁粒、氧化鉄、鉄釘屑、鉄合金及引火剂等。
The use of aluminothermic welding of large cross-section of the workpiece, such as rails, rolling calender, etc., of particularly good quality; this method can also be used for welding steel frame. The so-called aluminum welding is to use a mixture of pure aluminum and oxide 加, heated to 1300 ℃, the chemical reaction, release a lot of heat, the temperature of 3000 ℃ or more. With this high temperature molten metal and slag into the weld, the weldment by high heat melting and combined. This other welding method is simple, uniform quality and strong. [Thermite raw material selection and manufacturing] In order to obtain excellent quality of the weld bead, as a thermite raw materials have a certain chemical composition, otherwise it is not easy to obtain the desired effect. Aluminum raw materials, including aluminum particles, oxide 鉄, 鉄 nail crumbs, 鉄 alloys and ignition agent.