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Heat treatment process of 45 steel pipe

2021-04-29 10:05:55

Seamless steel pipe is generally the molten state of molten steel through the annular slit backlog in after the stretching and other disposal process forming, so there is no weld.  The performance, especially the pressure capacity of the ordinary steel pipe has a lot of improvement, so it is often used in high pressure equipment.

The 45 steel pipe for high quality carbon structural steel, hardness is not high and easy to cut, mold is often used to do templates, tips, guide posts, etc., but must be heat treated.
1. The 45 steel pipe without tempering after quenching, hardness greater than HRC55 (up to HRC62) is qualified.
The maximum hardness of practical application is HRC55 (HRC58 for high frequency quenching).
2. 45 steel pipe should not adopt the heat treatment process of carburizing and hardening.

After quenching and tempering, the parts have good comprehensive mechanical properties, which are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads.
But the surface hardness is low, not wear-resistant. The surface hardness of parts can be improved by quenching and tempering.

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