Abstract: A local resistance heating device with a controlled atmosphere, which includes two end members and a mid member, is provided. The two end members are respectively connected with an anode pole and a cathode pole, each end member has an air channel, the air channel of one of the end members is adapted to connect with an output terminal of a gas supplier, and the air channel of the other one of the end members is adapted to connect with a sucking terminal of the gas supplier. The mid member is arranged between the two end members, wherein the two end members and the mid member jointly define a heating room communicating with the air channels of the two end members.

Abstract: An activating flux for welding stainless steel includes: from 25 to 40 weight percent of titanium dioxide (TiO2); from 25 to 30 weight percent of chromium oxide (Cr2O3); from 10 to 30 weight percent of silicon dioxide (SiO2); from 10 to 15 weight percent of molybdenum disulphide (MoS2); and from 5 to 15 weight percent of molybdenum trioxide (MoO3), which are active additive materials. A welding rod or wire includes a welding material and an activating flux. The activating flux layer is provided on or in the welding rod or wire and is formed as an outer layer or a core portion of the welding rod or wire.

Abstract: A welding flux for stainless steel including 30-55 wt % of silicon dioxide, 20-40 wt % of titanium dioxide, 10-20 wt % of chromium oxide, 5-20 wt % of molybdenum oxide, 5-10 wt % of molybdenum sulfide, and 5-10 wt % of halide.

Abstract: An activating flux for welding stainless steel includes: from 25 to 40 weight percent of titanium dioxide (TiO2); from 25 to 30 weight percent of chromium oxide (Cr2O3); from 10 to 30 weight percent of silicon dioxide (SiO2); from 10 to 15 weight percent of molybdenum disulphide (MoS2); and from 5 to 15 weight percent of molybdenum trioxide (MoO3) which are of active additive materials. A welding rod or wire includes a welding material and an activating flux. The activating flux layer is provided on or in the welding rod or wire, and is formed as an outer layer or a core portion of the welding rod or wire.