Part structure is more complex, defects in the middle of the cutting plane, the uneven thickness of the walls of the implicated post-weld stress difficult to rule out the

cracks, such as the cracks between the valve seat port in the cylinder between the brim of the cracks, etc., In weldment welding of such of stoppage time, the nickel-based

electrode (z308) should be used in cold welding method or flame receipt less should District welding method.

Two defects in the edges, less stress, but also the cutting surface defects such as crack hole between the cylinder head screw and waterways, waterway hole extends to the

edge of the crack, the choice of the nickel-based electrode and cold electrode arc in copper-based welding method.

Occur at the central part of the thin-walled non-cutting surface defects, stress is often difficult to exclude, such as the cylinder block waterways crack or pound cylinder

is best to use the J506 carbon steel electrode arc cold, fill the plate method arc cold.

4 wall thickness greater than 15 mm of the edge of the rear axle sidewall cracks z208 electrode semi-hot Welding Wire or J422, J506 and other low-carbon steel electrode arc cold

method can be used.

Compact structure at the small parts, if the defects in wall thickness, a larger place, such as the sleeve hole fracture or support heavy vehicle balance arm crack repair

welding, can be used electrode, groove, continuous arc welding.

6 the site of the higher strength requirements, must be mixed welding repair, reinforcement with bolts, steel reinforcement, and so on with Welding Flux, and after the bridge

bulkhead crack repair on the use of bolt reinforcement with the law.