Gradient alloy is the high performance cemented carbide with multi-layer gradient structure.
In nature, bones of the animals are the type of gradient structure with hard outside and soft inside.
This principle is able to effectively solve the obstacle that the material with single hardness is apt to be damaged.
When the tungsten steel material is subjected to impact, the impact stress is rapidly released and buffered. 

The higher the hardness of the conventional tungsten steel, the worse the toughness and the easier the breakage.
The lower the hardness and the less wear-resistant allows the service life to fail to meet the requirement. 
Gradient alloy easily solves the performance contradiction of the traditional tungsten steel,
so that it can possess high hardness and high toughness simultaneously. 
Make moulds resistant to impact and abrasion! Make up for the defect of excessive gravity load of the forging design.
(The service life exhibits 3 to 6 times of growth)