Guangzhou Beyonz Automotive Parts Co., Ltd.

Guangzhou Beyonz Automotive Parts Co., Ltd.

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 Guangzhou Beyonz Automotive Parts Co., Ltd.
 Guangzhou Beyonz Automotive Parts Co., Ltd.
Technology
 Guangzhou Beyonz Automotive Parts Co., Ltd.

Casting Problem

Description:
Description:
Information

 

The requirement on the die casting product becomes higher and higher with the advance the era. In order to meet the demand of customers, we have carried out special researches and surveys to find some problems and corresponding solutions.

 

 

 

The problems arising during the die casting of the mold core are as follows: aluminum adhesion, burn, rupture, bending, and crack. The specific causes are as follows:

Problem

Reason

Countermeasure
 

Program
 

1.Aluminum Adhesion • Low fineness of the product part
• Poor cooling effect
• Inappropriate surface treatment selection
• Unreasonable draught design
The product part adopts vertical type grinding; chromium nitride hardly sticking to aluminum is adopted for surface treatment; and the cooling function is reinforced at an appropriate position.
 
45%
2.Burn • Unreasonable material selection
• Poor cooling effect
• High temperature
• Inappropriate surface treatment selection
Internal cooling is required; chromium nitride hardly sticking to aluminum is adopted for surface treatment (though TiALN is good for surface treatment, CrN is better.); material with high stability should be adopted; the heat processing technology resulting in the ordered arrangement of components after processing should be adopted; and the vertical grinding method should be adopted for grinding. 25%
3.Buckling • Arising at the mold core processing phase; and common NC lathe machining will surely result in bending
• Arising during die casting that produces buckling relevant with the release force and impact.
• Inappropriate surface treatment selection
The processing technology should be improved regarding the machine and the processing method; and the surface treatment by CrN and the vertical grinding method are recommended to use. 10%
4.Rupture • Unreasonable transition part of the pattern design
• Insufficient fineness of the cooling hole
• Absence of the cooling system
The relatively low internal hardness should be set during heat treatment, and TiALN with high hardness should be adopted for the surface treatment; fatigue of material is reduced and the position of the transition R angle is improved through shape design; and material with high toughness and not easily broken is needed, and however its toughness will be relatively reduced in case of high hardness. 10%
5.Crack • Inappropriate surface treatment selection
• Over high hardness of the heat treatment
• High temperature and absence of the cooling system
The higher the hardness is, the fewer the crack is. However, the crack will rapidly disperse as long as it arises. The lower the hardness is, the more the crack is. However, the dispersion speed is low. Therefore, when the material with high heat resistance is adopted, it is preferred to carry out surface treatment by TiALN. 10%

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