Dongguan stainless steel casting concerns

Stainless steel casting8Main considerations

one,

Chrome stainless steel has certain corrosion resistance(Oxidizing acid, organic acid, cavitation), Heat and wear resistance. Generally used for power stations, chemical plants, petroleum and other machinery and equipment and raw materials. The casting of chromium stainless steel is not good, and attention should be paid to the welding process and quenching and tempering treatment standards.

two,

chromium13Stainless steel has high hardenability after welding and is very easy to cause cracks. If the same type of chromium stainless steel electrode (g202,g207) Welding must be in300cAfter the above preheating and welding700cSlow cooling treatment. If the solder joints cannot be heat treated after welding, chromium-nickel stainless steel electrodes should be selected (a107,a207).

three,

cr17Stainless steel, in order to improve corrosion resistance and weldability, appropriate amount of stable componentsti,nb,moWait, thancr13Stainless steel has better weldability. The same type of chromium stainless steel chromium stainless steel electrode (g302,g307) Should be in200cThe above preheating and tempering after welding are about800c. When the weld cannot be heat-treated, please choose an inconel electrode(a17,a27).

Four,

When nickel-chromium alloys are welded, repeated heating will cause carbides to precipitate, reducing corrosion resistance and mechanical properties.

five,

cr-niThe electrical grade of stainless steel plate has excellent corrosion resistance and oxidation resistance, and is widely used in chemical plants, organic fertilizer, petroleum, medical equipment and other manufacturing industries.

six,

cr-niStainless steel leather products have titanium and low hydrogen. Titanium calcium type can be used for communication/DCWelding, but the penetration depth is shallow during AC welding and redness is easy, so use it as much as possibleDCpower supply. diameter4.0And the following can be used for all positions electric welding, diameter5.0And above can be used for flat welding and oblique fillet welding.

seven,

The electrode should be kept dry, the titanium calcium type should be in150℃ dry1Hours, the low hydrogen type should be in200250℃ dry1Hours (do not dry repeatedly, otherwise the skin is easy to crack and peel) to prevent the electrode from sticking to oil and other dirt, to avoid the increase of carbon content and the improvement of weld quality.

Eight,

In order to prevent corrosion between the eyes due to heating, the welding current should not be too large, less than20%For carbon steel electrodes, the arc should not be too long, and the inter-layer cooling should be fast to narrow the passage appropriately.