Forming Mechanism and Processing Control of Hot Crack in Die-casting Magnesium Alloys;

Simulation of welding hot cracks in austenitic stainless steel pipe butt joints;

From which,although the welding properties are not the same for different aluminum alloy brands,but the main reason for such aluminum alloy thin-walled tube cracking was not the material itself,and the instability for energy input in welding caused concavity and convexity to arose hot cracks.

Mechanism of weld with trailing impact rolling to control residual stresses deformation and hot cracking;

Strain field analysis of weld with trailing impact rolling to control residual stress and distortion and prevent hot cracking;

Effect of restraint condition on hot cracking during welding of 2A12T4 aluminum alloy

So the crack is reheat crack,it can be .

The base metal 15CrMoG component and weldability,welding method,welding material,welding structure,technics parameter,welding process and heat treatment were analyzed,the improving welding measure was put forward,which effectively avoided reheat crack and the other welding defects of certain ship boiler pipe.

After analyzing,the source of the welded joint fracture on the sealing structure of the reheater through the penthouse superheater in a 1025t/h boiler is reheat crack which is caused by high rigidity and high stress concentration of the welding joint,excessive welding energy input and heat stress existing in the joint when operating.

The susceptibility of HCM2S steel to reheat cracking has been studied by y-groove restraint weld cracking tests,which confirm the steel's susceptibility in the temperature range between 690(°C)～760(°C).

On the basis of the principles and structures of the cold cracking implant testing machine,the study on the implant equipment of reheat cracking test is reviewed in this paper.