Can ordinary electrodes weld cast iron? What electrode is used for cast steel welding?

Ordinary electrodes can theoretically weld cast iron, and the risk of cracks can be reduced by preheating before welding and post-welding heat preservation treatment, but the restrictions on welding conditions are relatively large, and there are generally hot welding conditions, or when the welding cost requirements are relatively low. However, from the actual cast iron overhaul, it is still more cold welding process, and the material is selected from wewelding777 special cast iron electrode with excellent crack resistance, which saves the cumbersome hot welding process of preheating and post-welding insulation during the welding process, and the focus is that the strength after welding is higher than that of common cast iron electrodes.

That's definitely not good, the crack tendency of high-chromium cast iron is too large, generally welded with nickel-based cast iron electrodes, commonly used 308, but 308 is slightly insufficient in the strength level, from the strength matching and crack resistance effect wewelding777 is undoubtedly the ideal choice, but there are too many fakes.

Characteristics of WeWelding 777 Special Cast Iron Electrodes.

Wewelding777 has a special coating effect, the welding process can produce a soft arc similar to the pulse, the thermal impact on all kinds of cast iron base metal is very small, the special pulse arc can remove all kinds of impurities on the surface of the cast iron, and even for the welding of oil stains and long-term oil immersion castings also has good permeability without porosity or inclusion, and the hardness of the heat affected zone will not become very high, and the forming weld welded by the cold welding process has very excellent crack resistance, Able to cope with all kinds of harsh base metal environments.

Application of WeWelding 777 Special Cast Iron Electrode.

It is suitable for all-round cold welding process welding, can weld almost all cast iron base metals, and is easy to realize the dissimilar welding of cast iron and carbon steel, solve the defects such as matrix fracture, crack, wear, and hole filling, and can be machined after welding, and is used in various types of iron castings such as engine housings, cylinder heads, machine bases, and gear teeth of casting gears on many occasions.

Technical parameters of wewelding777 special cast iron electrode.

Tensile Strength: 70,000 psi (482 Nv2 mm²) Yield Strength: Typically 62,000 (427 Nn mm²) Hardness (Hb): 185HB

Color matching with the base metal: similar Power supply selection: AC and DC dual-use, DC reverse connection when DC.

Composition of WeWelding 777 Special Cast Iron Electrodes.

Composition: Nickel, Iron & Oxide, Silicon & Oxide, Rest.

Proportion: (%60%-100% 2%-10% unknown.

Diameter (mm).

Current (amps) 60-100 85-110 90-140 Package Weight (lbs) 2 2 2

No way! Cast iron electrodes are a must! Ordinary electrodes are welded with too many pores and are not strong.

Ordinary electrodes refer to 502 or.

The low-carbon electrode of it.

Welding cast iron with it can be done in two passes. If you use a 3 or 2 diameter electrode for the first time, the current should be between 130 and 150. The second current is just around 120.

This will be a little more intense. Because the high-current occlusion will be better, however, the high-current weld bead is thin, and the low-carbon electrode welding cast iron will have porosity and stress cracks. It would be nice to make up for this defect for the second time.

But be careful not to take too long to weld. Prone to large cracks. If you are hardfacing for the second time, you can tap the weld bead to relieve the stress.

Before welding, it is necessary to remove foreign matter from the welding part. Just grind with an angle grinder. There is also a 502 that works a little better than the 422. You can also try to reverse the positive and negative poles of the ground wire and the welding knob, so that the welding arc will be more stable when welding.

The connection can be connected, but the connected firmware is not firm. When I connect it with a cast iron electrode, I am sure.

Summary. Hello dear! Glad for your question!

What electrode is used for cast steel welding? The selection of welding rods for cast steel welding is mainly divided into the following situations: cast steel can be divided into low carbon steel, medium carbon steel, etc., the composition is different, the welding rod used is also different, if it is a low carbon steel composition, the use of ordinary welding rod, such as E4303 (J422) can be; If it is a medium carbon steel component, high-strength structural steel electrodes should be selected, such as E5015 (J507), E5515 (J557), etc., and the weldments should be preheated during welding to prevent cracks.

Good. Hello dear! Glad for your question!

What electrode is used for cast steel welding? The selection of welding rods for cast steel welding is mainly divided into the following situations: cast steel can be divided into low carbon steel, medium carbon steel, etc., the composition is different, the welding rod used is also different, if it is a low carbon steel composition, the use of ordinary welding rod, such as E4303 (J422) can be; If it is a medium carbon steel component, high-strength structural steel electrodes should be selected, such as E5015 (J507), E5515 (J557), etc., and the weldments should be preheated during welding to prevent cracks.

How to weld without cracks.

The cast steel electrode must be preheated before use to prevent cracks in the welding flesh after welding. Cast Steel Welding: Welding Method:

Manual arc welding. 1 Preheating The preheating temperature of the weld is 125 200 (the preheating range is 75mm from the center of the weld), and it is heated with a flame, and the preheating must be slow and uniform to avoid cracks and deformation. 2 interlayer temperature control The interlayer temperature of the weld is 125 250, and the lower limit of the temperature is used to ensure that the rear weld has the minimum preheating conditions in the multi-layer weld, and the upper limit of the temperature is to avoid thermal stress cracks.

The interlayer temperature is controlled by supplemental heating or slow welding. 3 Post-weld heat treatment The weld area is heated to 200 250 with a flame, kept warm for hours and covered with fireproof rock wool, and then allowed to cool slowly.