How to prevent deformation during head quenching?
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Our company cannot control the diameter change of the processed heads during heat treatment, especially when the heads are severely deformed during quenching. Are there any good anti-deformation measures? Preferably lowest cost. This post was last edited by szftduanhaihua on 2009-2-25 20:14 ]
For small-diameter heads, there should be no problem as long as they are reinforced internally with support rings. There seems to be no better method for large-diameter thin-walled heads, especially stainless steel heads.
Head quenching? Does your company produce pressure vessels? How dare I buy it!
Comrade upstairs, why don’t you know this? After heat forming, the material must return to its original supply state. The thick-walled head is hot-pressed, so heat treatment is required to ensure the strength and toughness of the head.
What is the material, what is the thermoforming temperature, and does it have to be quenched to restore its mechanical properties?
. . Ordinary carbon steel heads do not need to be quenched. . Even thick-walled ones are not necessary. . Stainless steel does have solution treatment. .
Carbon steel is normalized, stainless steel is solid solutioned, alloy steel is normalized and tempered, and aluminum is annealed. These are the original states of materials after leaving the factory. Why does the poster need to quench? I can't figure it out, the head is not a mold, and the pressure components of pressure vessels are generally not quenched?
Guys upstairs, chromium-molybdenum steel materials need to be quenched to increase strength.
Chromium-molybdenum steel materials do not need to be quenched.
Carbon steel is normalized, stainless steel is solid solutioned, alloy steel is normalized and tempered, and aluminum is annealed, not quenched.
The state of 15CrMoR steel plate is normalizing + tempering. When the hot forming or hot processing process of the head cannot replace the normalizing treatment, it is allowed to be cooled from the hot forming temperature to 260°C and then heated to the normalizing temperature for normalizing treatment.
Haha, the poster may have misunderstood quenching as normalizing. The hardness of the quenched material increases, but the plasticity and toughness decrease. Pressure vessel materials require good strength and toughness.
Do pressure vessel heads need to be quenched? This is the first time I heard about it,