High-Temperature Tubesheet Heat Treatment Process

Product name:High-Temperature Tubesheet Heat Treatment Process
Keywords:High-Temperature Tubesheet Heat Treatment Process
Industry:Petroleum, natural gas and chemical industry - Chemical industry
Process:Forging - Upset forging
Material:Stainless steel

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Product details

High-temperature tubesheet heat treatment requires normalizing + tempering to eliminate welding residual stress and stabilize the microstructure. A typical process involves normalizing at 900-950℃ for 2h, followed by tempering at 620-680℃ for 4h, ensuring a hardness ≤ 225HB.

Key control points include a heating rate ≤ 150℃/h, laminar flow cooling, and multi-point temperature measurement with thermocouples. Chromium-molybdenum steel tubesheets require an additional hydrogen removal treatment (300℃ × 2h) to prevent cold cracking.

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