江苏11选5走势图

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    13733919801/13592198132

    合金★结构板

    12Cr1MoV舞钢12Cr1MoV宝钢12Cr1MoV新余12Cr1MoV性能〓

    作者:李成13733919801 发布时间:2020/03/24 点击量:

     江苏11选5走势图

    12Cr1MoV ,合金★结构钢。统一数字代号:A31132。标准:GB/T3077-1999


    12Cr1MoV, alloy structural steel. Unified number code: a31132. Standard: GB / t3077-1999 chemical composition
    化学成分chemical composition
    力学性能〓

    【试样毛坯尺寸】

    30mm

    热处理

    淬火加▆热温度(℃):970;冷却剂:空

    回火加▆热温度(℃):750;冷却剂:空

    力学性能〓

    抗拉强度(σb/MPa):≥490

    屈服点(σs/MPa):≥245 断后伸长率(δ5/%):≤22

    断面收缩率(ψ/%):≥50

    冲击吸收功(Aku2/J):≥71

    冲击韧性值αkv (J/cm2):≥88(9)

    布氏硬度(HBS100/3000)(退火或高温回火状态):≤179

    常温下:许用拉应力(σw/MPa):93 许用弯曲应力(σw/MPa):112 许用剪应力(T/MPa):56

     应用举例

    这种钢主要在正火及高温回火后使用 ,用以制造高压设◢备中工▲作温度不超过570~585的过热钢管、导管、蛇形管及其它相应的锻件。
    This kind of steel is mainly used after normalizing and high temperature tempering to make overheated steel pipes, conduits, serpentines and other corresponding forgings with working temperature not exceeding 570-585 ℃ in high-pressure equipment.

    主要特性

    主要特性:此钢与12CrMoV钢相比 ,具有更高的抗氧化性及热强性。此钢的蠕变极限与持久强度值很接近 ,并在持久拉伸的情况下具有高的塑性;钢的工▲艺性与焊接性良好 ,但焊前需预热至300℃ ,焊后需除应力处理。

    是高压、超高压、亚临界电站锅炉过热☉器、集箱№和主蒸气导管广泛采用的钢种。580℃时仍具有高的热强性№和抗氧化性能〓 ,有较高的持久塑性。生产工▲艺较简单 ,焊接性能〓良好 ,但对正火冷却速度较敏感。580℃长期使用会产生珠光体球化。

    Main characteristics: compared with 12CrMoV steel, this steel has higher oxidation resistance and thermal strength. The creep limit of the steel is very close to the value of the endurance strength, and it has high plasticity under the condition of the endurance tension; the steel has good processability and weldability, but it needs to be preheated to 300 ℃ before welding, and the stress should be removed after welding.
    It is widely used in Superheater, header and main steam pipe of high pressure, ultra-high pressure and subcritical power station boiler. At 580 ℃, it still has high thermal strength, oxidation resistance and durable plasticity. The production process is simple, the welding performance is good, but it is sensitive to normalizing cooling speed. Pearlite spheroidization will be produced after long-term use at 580 ℃.

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