As an important part of the machine tool, the ball screw is bound to withstand huge friction during the operation of the machine tool. Therefore, it wears out relatively quickly. For this reason, many manufacturers use medium-frequency induction heating machines to quench and heat treat ball screws, hoping to improve their hardness, wear resistance and service life. Today, we will not talk about the intermediate frequency quenching process of the ball screw, but we will talk about the quenching requirements of the ball screw.
There are many types of ball screws, the more common ones are GCr15, GCr15SiMn, CrWMn, and 9Mn2V ball screws. The induction hardening technical requirements are shown in the table below:
|
Project |
Technical requirements |
Remark |
|
Surface hardness HRC |
58-62 |
Raceway surface hardness |
|
Hardened layer depth/mm |
According to the technical requirements of the screw pattern |
The hardened layer is uniform and there is no soft zone. The hardened layer of various specifications of screws should be 1mm deeper than the bottom of the raceway (calculated to half martensite)
General raceway hardened layer depth: threaded boss (top) ≥ 4mm, threaded groove (bottom) ≥ 2mm. The depth of the final hardened layer of the finished product requires the thread groove (bottom) to be ≥1mm |
|
Microstructure |
马氏体1-3级 |
Observe three places: the threaded boss (top), the 45° part in contact with the steel ball, and the threaded groove (bottom) |
|
Complete distortion/mm |
According to the technical requirements of the screw pattern |
Used for medium frequency induction hardening of various types of ball screws |
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GS-ZP-1200
