Ductile iron castings knowledge sharing
Author: Date: 2015-9-28 11:10:45
Argon welding heat affected because large patches will cause deformation of ductile iron casting,the hardness decreased,trachoma,local annealing,cracks,pinholes,abrasion,scratch,bite edge,or a combination of not enough and the secondary defects such as internal stress injury . cold welding machine just to overcome the above disadvantages.
The advantage is mainly manifested in the small heat-affected zone,ductile iron castings without preheating,at room temperature cold welding repair,and thus no distortion,undercut and residual stress,no local annealing,casting the metal structure does not change state. So cold welding precision castings for surface defect repair. cold welding of the welding range Φ1.5-Φ1.2mm repeated melting point of accumulation of welding process,in the large area defect repair process,the repair efficiency of its broad application is restricting the only a factor. For large defects,recommends the traditional welding process and casting defect repairing machine composite applications.
Ductile iron castings due to many factors,often there will be holes,pinholes,slag,cracks,pits and other defects. Commonly used repair equipment for the welding machine,welding machine,cold welding and so on. For the quality and appearance casting defects can be less demanding welding machines and other heat,speed welding to repair. but bug fixes in the field of precision castings.