Stainless steel sculpture manufacturers: stainless steel sculpture welding precautions and details

We can see all kinds of sculptures everywhere in our lives. Among them, stainless steel sculptures are a relatively common one. For stainless steel sculptures, people may still have a little understanding of it. Let me introduce you to the welding precautions and details of stainless steel sculptures. 1. Precautions for welding of stainless steel sculpture 1. In order to prevent intergranular corrosion caused by heating, the welding current should not be too large. Generally, it should be about 20% lower than the carbon steel electrode. The arc should not be too long, and the interlayer will be cooled quickly. It is appropriate. 2. When starting the arc, be careful not to ignite the arc at the non-welded part, and use the arc ignition plate of the same material as the weldment to ignite the arc. 3. Use short arc welding as much as possible. The length is generally 2-3mm. 4. Welding electrodes for dissimilar steels should be carefully selected to prevent improper selection of hot cracks or precipitation of σ phase after high-temperature heat treatment, which will embrittle the metal. Refer to the selection standards for stainless steel and dissimilar steel electrodes for selection, and Adopt appropriate welding process. 5. Generally speaking, there are two types of stainless steel electrodes: calcium titanium type and low hydrogen type. Titanium calcium type coating electrodes are only suitable for flat welding and flat fillet welding, not suitable for all-position welding; low hydrogen type The coated electrode can be used for all-position welding. When welding, the current is as much as possible to use a DC power source, which is helpful to overcome the redness and shallow penetration of the electrode. 6. The stainless steel electrode should be kept dry when in use. In order to avoid cracks, pits, and pores For other defects, the titanium calcium type coating is dried at 150-250°C for 1 hour before welding, and the low hydrogen type coating is dried at 200-300°C for 1 hour before welding. The drying cannot be repeated many times, otherwise the coating will easily fall off. Second, stainless steel sculpture welding details 1. Stainless steel sculpture electrodes usually have two types: titanium calcium type and low hydrogen type. Welding current should be selected as a DC power source as much as possible, which is conducive to overcoming the redness and shallow penetration of the electrode. The electrode of the titanium calcium type coating is not Suitable for welding, only for flat welding and flat fillet welding; welding electrodes with low hydrogen type coatings can be used for welding. 2. Stainless steel electrodes should be kept dry during use. In order to avoid defects such as cracks, pits, and pores, titanium calcium type Dry the skin at 150-250℃ for 1h before welding, and dry at 200-300℃ for 1h before low-hydrogen coating welding. Do not repeat the drying, otherwise the coating will fall off. 3. Welding joints should be cleaned. And to avoid the welding rod being stained with oil and other stains, to avoid adding the carbon content of the weld and affecting the welding quality. 4. To avoid intergranular corrosion caused by heating, the welding current should not be too large, usually it should be about 20% lower than that of carbon steel electrodes. The arc should not be too long, the layer should be cooled quickly, and narrow-pass welding is appropriate. 5. When starting the arc, pay attention to not igniting the arc at the non-welded part. Use the arc ignition plate of the same material as the weldment to ignite the arc. 6. Application Use short arc welding as much as possible. The arc length is usually 2-3mm. If the arc is too long, thermal cracks are likely to occur. 7. Transport: short arc rapid welding should be used, and lateral swing is generally not allowed. The purpose is to reduce the heat and the width of the heat-affected zone. , Improve the welding seam's ability to resist intergranular corrosion and reduce the tendency of hot cracks.8.The welding of dissimilar steels should be steadily selected to avoid the improper selection of welding rods to show hot cracks or high temperature heat treatment to cause the σ phase to separate and make the metal embrittlement. The above content is brought to you by Beijing Sculpture Factory Here is an introduction about the precautions and details of stainless steel sculpture welding, I hope it can help you.