When stainless steel welding rod is used, answer advertent what doubt

1, chromic stainless steel is had be able to bear or endure surely corrode (oxidisability acid, organic acid, cavitation erosion) , heat-resisting and wear-resisting function. Use at the equipment material such as power station, chemical industry, oil commonly. Weldability of chromic stainless steel is poorer, should solder alertly condition of technology, heat treatment and choose appropriate welding electrode.

2, chromic sclerotic sex is bigger after 13 stainless steel solder, produce crackle simply. If choose the welding rod of chromic stainless steel that is the same as a type (G202, G207) solder, the delay cold treatment that the 700 ℃ after be necessary to undertake the warm-up of 300 ℃ above and solder order about. If weldment cannot have the heat treatment after solder, should choose welding rod of chromic nickel stainless steel.

3, chromic 17 stainless steel, be able to bear or endure to corrode function reachs weldability and add Ti of proper stability element, Nb, Mo to wait appropriately for improvement, weldability is more chromic 13 stainless steel are better. Choose the welding rod of chromic stainless steel that is the same as a type (G302, G307) when, the temper that should undertake the 800 ℃ after the warm-up of 200 ℃ above and solder order about is handled. If weldment cannot have heat treatment, should choose welding rod of chromic nickel stainless steel.

4, welding rod of chromic nickel stainless steel is had crackajack corrosion resistance and fight oxidisability, wide application is made at machinery of chemical industry, chemical fertilizer, oil, medical treatment.

5, when chromic nickel stainless steel solders, repeat heat cent gives carbide, drop corrosion resistance and mechanical function.

6, coating of chromic nickel stainless steel has titanium calcium model with low hydrogen model. Titanium calcium can use at delivering direct current, but the frit when communication solder is deep more shallow, a brief single shot is red, reason chooses direct current source as far as possible. Diameter 4 reach the following and usable Yu Quanfang weldment, 5 reach above to be used at flat position welding and solder of a straight angle.

7, when welding rod is used, should hold to as dry as a chip, titanium calcium should via 150 ℃ as dry as a chip 1 hour, low hydrogen should classics 200-250 ℃ is as dry as a chip 1 hour (cannot repeat stoving frequently, coating is otherwise simple craze falls off) , avoid welding rod coating to stick dirty thing of oil and other, avoid to cause welding line to add the quantity that contain carbon and influence weldment quality.

8, happen to because heat,avoid corrode between eyeball, solder electric current shoulds not be too big, welding rod of the steel that compare carbon is less 20 ％ order about, electric arc shoulds not be too long, between the layer fast cold, with narrow solder path is advisable.

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