Heat treatment for cylinder block casted with high pressure die-casting

Abstract

Disclosed is a heat treatment method for a cylinder block of an internal combustion engine. More specifically, the method includes heating the cylinder block to a solution heat treatment temperature, processing the cylinder block at the solution heat treatment temperature between 440° C. to 460° C. for one to two hours, quenching the cylinder block and then immediately aging the cylinder block for a predetermined amount of time.

What is claimed is: 
     
         1 . A heat treatment method of a high pressure casting cylinder block, comprising:
 heating the cylinder block to a solution heat treatment temperature;   processing the cylinder block at a solution heat treatment temperature ranging from 440° C. to 460° C. for one to two hours;   quenching the cylinder block to a first predetermine temperature; and   in response to reaching the first predetermined temperature, heating the cylinder block to a second predetermined temperature and aging the cylinder block for a predetermined amount of time.   
     
     
         2 . The heat treatment method of  claim 1 , wherein the high pressure casting is a die casting method. 
     
     
         3 . The heat treatment method of  claim 1 , wherein the solution heat treatment temperature is maintained for 1.5 to 2 hours. 
     
     
         4 . The heat treatment method of  claim 1 , wherein the first predetermined temperature ranges from 65° C. to 90° C. 
     
     
         5 . The heat treatment method of  claim 1 , wherein after the quenching of the cylinder block, the cylinder block is aged at a temperature ranging from 150° C. to 200° C. for 2 to 5 hours. 
     
     
         6 . The heat treatment method of  claim 1 , wherein a material of the cylinder block is an aluminum alloy ADC10. 
     
     
         7 . The heat treatment method of  claim 1 , wherein the cylinder block is implemented in an internal combustion engine of a vehicle.