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首台国产化CF-62钢制1500m~3乙烯球罐消除焊接残余应力的热处理,是以柴油为主要燃料,以液化石油气为辅助燃料,以球体为炉体,球罐外加保温,严格监测和控制升温速度、降温速度、恒温温度,经570±20C×2h整体热处理,残余应力从0.81σ,降到了0.33σs以下,达到了热处理的主要目的。热处理后的母材和焊接接头低温性能仍能满足设计要求(-40℃时的AKV≥47J)。
The first domestic heat treatment of the welded CF-62 steel 1500m ~ 3 vinyl tank to eliminate welding residual stress is based on diesel as the main fuel, liquefied petroleum gas as the auxiliary fuel, the ball as the furnace body, the ball tank plus insulation, strict monitoring And the control of the heating rate, cooling rate, constant temperature, the overall heat treatment 570 ± 20C × 2h, the residual stress from 0.81σ, down to 0.33σs below, to achieve the main purpose of heat treatment. After heat treatment of the base metal and welded joints low temperature performance can still meet the design requirements (-40 ℃ AKV ≥ 47J).