Early crack of die casting die is mainly dependent on composition segregation

adequate quenching pressure

slow cooling rate and small section angle.Through solid solution

quenching and high temperature tempering

grading and isothermal quenching

tempering cooling methods

the toughness and service life of the mould were improved.During heating process

overheating can induce martensite acupuncture and the coarse grain

so that the slide fracture exhibited quasi-cleavage brittle fracture

so heat treatment process operation and control of sliding block should be strictly implemented and inspected.Through steam treatment

ion nitriding

PVD

CVD surface coating

boronizing

spraying lubricant

the die soldering and melting loss failure can be eliminated effectively.