【Know Molybdenum】How to Improve Durability of TZM Piercing Plug When Piercing Seamless Steel Tube?
- Details
- Category: Molybdenum knowledge
- Published on 21 August 2020
- Written by Shuxia
- Hits: 120
To overcome the deterioration in the durability of the TZM piercing plug when used to pierce the seamless steel tube, a multiplicity of techniques 1 to 4 below have been suggested:
1. To use, as the material of the piercing plug, a material, such as molybdenum alloy, having greater high-temperature strength than that of the alloy steel to prevent the plug from being damaged due to deformation.
2. A lubricant is supplied through a portion of the surface of the plug so as to be applied between the hollow shell and the plug to prevent damage taking place due to seizure.
3. A hard material or the like is allowed to adhere to the surface of the plug by surface treatment to prevent the seizure and abrasion to improve the durability of the plug.
4. To use a scale produced due to oxidation as a lubricant, the environment in which the heat treatment for the plug and the like are changed to thicken and raise the density of the scale to improve the durability.
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