1, chromium stainless steel stamping elbow has must be corrosion resistant (oxidizing acid, organic acids, cavitation), heat-resisting and wear-resisting function. Who used for power station equipment decoration material, chemical, oil and other Settings. Chromium stainless steel stamping elbow poor weldability, should be detailed before welding, heat treatment of speaking of choose suitable welding electrode.
2, chromium nickel stainless steel stamping elbow has choiceness erosion resistance and oxidation resistance, widely used in chemical, fertilizer, oil, medicine, machinery manufacturing.
3, chrome and stainless steel stamping elbow sclerosing eve, after welding cracks easily occur. If the acceptance with typical chromium stainless steel stamping elbow electrode welding, required preheat above 300 ℃ and 700 ℃ after welding at the mercy of slow cooling treatment. If cannot undertake the weldment heat treatment after welding, should choose the chromium nickel stainless steel stamping elbow.
4, chromium nickel stainless steel stamping elbow, when welding the carbide precipitation by repeated heating, lower resistance to erosion and mechanical function.
5, chromium nickel stainless steel stamping elbow coated with titanium calcium type and low hydrogen type. Titanium calcium type can be used for ac/dc, but when the ac welding penetration, redness easily at the same time, therefore, stainless steel stamping elbow as general acceptance of dc power supply.
6, stainless steel stamping elbow manipulation should link when dry, titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should be 1 hour after the 200-250 ℃ drying (cannot be repeated many times to dry, otherwise the medicine skin peeling easy craze), beware of the stainless steel stamping elbow coated viscous oil and dirt, lest cause stainless steel stamping elbow add carbon content and influence welding quality of weld.
7, chrome and stainless steel stamping elbow, appropriate for the improved corrosion resistant function and weldability add adequate stability element Ti, Nb and Mo, weldability is chrome and stainless steel stamping elbow is better. Acceptance with typical chromium stainless steel stamping elbow, should be above 200 ℃ preheat and at the mercy of 800 ℃ and tempering treatment after welding. If weldment not for heat treatment, should choose the chromium nickel stainless steel stamping elbow.
0 comments:
Post a Comment