The threaded measuring rod is an accessory on the threaded micrometer. Its material is usually measuring tool steel. It has to withstand huge friction during the working process. For this reason, we often use high-frequency induction heating equipment to heat treat the threaded measuring rod to improve its hardness. , wear resistance and service life. Today, the editor will briefly introduce to you the high-frequency heat treatment process of threaded measuring rods.
As an important measuring tool, threaded measuring rods are widely used and come in many types. Different types of threaded measuring rods have different heat treatment processes. Due to limited time, the editor cannot introduce them to you one by one. There is no way to briefly introduce the heat treatment process using our common GCr15 steel micrometer threaded measuring rod as an example. .
The outer dimensions of GCr15 steel micrometer threaded rod are diameter 8mmX110mm, hardness requirement 58-62HRC, heat treatment curvature ≤0.15mm, quenched martensite level ≤2. Its high-frequency heat treatment process is as follows.
1) Preheat. Preheating heat treatment at 650-700℃x7min.
2) Heating. High-frequency induction heating equipment is used for induction heating heat treatment at 850-860℃x7min.
3) Cool down. The coolant is nitrate, which is graded at 200-220℃xlmin and then air-cooled.
4) Tempering. High-frequency induction heating equipment is used for tempering heat treatment at 190-210℃x2h.
Okay, today I will briefly introduce the high-frequency heat treatment process of GCr15 steel micrometer threaded rod. If you want to know more about the heat treatment process of threaded rod, you can read books on heat treatment. I believe you There will be great gains.
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