Views: 0 Author: Site Editor Publish Time: 2023-08-16 Origin: Site
The dual-hardness self-drilling screw is made of alloy steel, and adopts a segmented heat treatment method to make the bearing part of the screw have stronger toughness, and at the same time make the drill point and threaded part have greater hardness to achieve stronger drilling force.
Two-step heat treatment
1. Surface hardening treatment is carried out on the head of the screw, which has the characteristics of strong extensibility, durability and resistance to hydrogen embrittlement.
2. Selectively hardened drill bit and threaded sleeve for good drilling and tapping performance.
