Notes for stamping elbow welding
1. The first stamping elbow has a certain corrosion resistance (oxygen reactive acid, organic acid, cavitation), heat resistance and wear resistance function. Usually used in power plants, chemical, petroleum and other equipment materials. Stamping elbow welding performance is poor, should pay attention to the welding process, heat treatment premise and choose the right electrode.
2. Stamping elbow welding, under repeated heating carbide precipitation, reducing corrosion resistance and mechanical function.
3. And stamping elbow welding after the hardening is larger, easy to produce cracks. If the same type of stamping elbow welding, it is necessary to carry out the preheating of more than 300℃ and the slow cooling treatment of about 700℃ after welding. If the welding part cannot be heat treated after welding, the stamping elbow electrode should be selected.
4. Stamping elbow medicine skin has titanium calcium type and low hydrogen type. Titanium calcium type can be used for ac-dc, but the depth is shallow when ac welding, at the same time easy red, so as far as possible to use dc power supply.
5. Stamping elbow in order to improve corrosion resistance and weldability and appropriate increase in the right amount of non-disorderly elements Ti, Nb, Mo, etc., the weldability is better than the stamping elbow. When using the same type of chromium stainless steel electrode, it should be preheated above 200℃ and tempered around 800℃ after welding. If the weldment cannot be heat treated, chrome-nickel stainless steel electrode should be used.
6. The use of the electrode should be kept dry, titanium calcium type should be dried by 150℃ for 1 hour, low hydrogen type should be dried by 200-250℃ for 1 hour (can not be repeated drying, otherwise the coating is easy to crack and peel off), to prevent the electrode coating stick oil and other dirt, so as not to cause the increase of carbon content and affect the welding quality.
7. In order to prevent the heat caused by the eye erosion, the welding current should not be too large, less than the carbon steel electrode about 20%, the arc should not be too long, the layer between the rapid cooling, narrow welding pass is appropriate.
Stamping elbow electrode has good corrosion resistance and antioxidant reactivity, widely used in chemical industry, chemical fertilizer, petroleum, medical machinery manufacturing. Haihao Group specializes in the production of stamping elbow for more than 30 years, welcome new and old customers who are interested to buy.Email:firstname.lastname@example.org