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发明授权
CN107937831B 压力容器用12Cr2Mo1V合金钢及其锻造热处理工艺 失效 - 权利终止

压力容器用12Cr2Mo1V合金钢及其锻造热处理工艺
摘要：
本发明公开了一种压力容器用12Cr2Mo1V合金钢，所述12Cr2Mo1V合金钢的化学成分以重量百分比计，其主要组份包括C、Si、Mn、P、S、Cr、Mo、V、Ti、B、Nb、Ni和Al；残余元素包括As、Sn、Sb、Cu、Ca和部分气体元素，余量为Fe及不可避免的杂质。该合金钢的锻造热处理工艺中坯料的锻造过程为5次火，锻造比为8，坯料的初始加热温度定在1250℃，每一工序的终锻温度要求大于900℃，最后一火的终锻温度大于860℃%；再经过退火、淬火、回火的热处理工艺得到满足要求的合金钢。本发明制备的合金钢具有较高的常温和高温强度、硬度，良好的低温冲击韧性、抗回火脆性及较高的蠕变强度和高温持久强度。
摘要（英）：

The invention discloses 12Cr2Mo1V alloy steel for a pressure vessel. The 12Cr2Mo1V alloy steel comprises main components of, by weight, C, Si, Mn, P, S, Cr, Mo, V, Ti, B, Nb, Ni and Al, and comprisesresidual elements of, by weight, As, Sn, Sb, Cu, Ca and part of gas elements, and the balance Fe and inevitable impurities. According to a forging heat treatment process of the alloy steel, the heating number of a blank in the forging process is five, the forging ratio is eight, the initial heating temperature of the blank is set to be 1250 DEG C, the final forging temperature of each working procedure is higher than 900 DEG C, and the final forging temperature of the last heating is higher than 860 DEG C; and the alloy steel meeting the requirements is obtained through the heat treatment process including annealing, quenching and tempering. The prepared alloy steel has relatively high normal temperature strength and hardness and high temperature strength and hardness, good low-temperatureimpact toughness, good anti-tempering brittleness, high creep strength and high high-temperature endurance strength.

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