Welding is one of the important steps in the alloy steel castings, therefore, when welding the welding points, can help us work smoothly. Here, my company is for everybody to introduce its three welding points.

1, the welding parts

Welding position appropriate USES alloy steel castings, symmetric resistance spot welding, and then the whole welding way, avoid stress concentration cracking castings, welding layer (base), such as the joint is small, can use 3.2 electrode. Welding on the second floor, will use the 4.0 electrode, due to the large castings, according to 1/6 circle, subsection welding.

2, the crack problem

Of the welding crack should be along the crack in grafting groove, groove depth and the length of the crack area should be cut out again repair welding. When the welding crack head first and started along the crack from the crack root welding. The hardness greater than HRC38, adopting AI02 electrode covering.

3, the welding temperature

On hierarchical welding part should be on the first floor of the cooled to a temperature of 200-300 degrees Celsius after welding layer again after the welding skin clean, so on.

Three welding point is welding temperature alloy steel castings, welding parts and crack problem, so take special attention in the welding process.