The Cause of the 1022A Machine Screw Fracture

source：    Author：Catherine    views：166    Release time：2014-11-13

Many friends complain that their 1022A machine screw easily fracture. I often heard such complaints. So it is very necessary to know the cause of the 1022A machine screw fracture. Today, we will discuss about it together.

This is a triangular tooth screw. It has the function of locking. The likely causes of the screw fracture include:

1.Hydrogen embrittlement fracture: If it is C1022 material, it is generally the carburizing heat treatment. Surface hardness is relatively high, and the core hardness is relatively low. It may be heat treatment problem. High core hardness leads to brittleness increase. Even if electroplating do the hydrogen treatment, the risk of hydrogen embrittlement is still very big.

2.Deep groove leads to the weak joints of head and neck : I feel the possibility of this reason is not very big.

3.The R Angle on the joints of head and neck is too small: Just the same as the second, it leads to weak joints.

   Generally speaking, if the above three aspects are well controlled, there is no problem in using this kind of machine screw. Finally, I want to give a suggestion to China screw manufacturer. If you don’t know in what place it use, you can make a product of 8.8 class by using C1035 material. There will be no risk of hydrogen embrittlement.