1) intercritical reheated coarse-grained heat-affected zon
临界再热粗晶区
1.
This study is concerned with the effect of post welding heat treatment(PWHT)on the microstructure and properties at the intercritical reheated coarse-grained heat-affected zone(IRCGHAZ)of WB36 steel, and investigated whether the PWHT could reduce IRCGHAZ embrittlement.
针对WB36钢(15NiCuMoNb5)临界再热粗晶区(IRCGHAZ)存在的脆化现象,研究了焊后热处理对模拟临界再热粗晶区(IRCGHAZ)组织性能的影响,探讨其改善韧性作用。
2) intercritically reheated coarse-grained heat(IRCGHAZ)
临界再热粗晶区(IRCGHAZ)
1.
The net-like microstructure(NM) and its formation mechanism in the intercritically reheated coarse-grained heat(IRCGHAZ)of WB36 steel(15NiCuMoNb5)was investigated,and the influence of the microstructure on toughness of the steel was examined.
研究了WB36钢临界再热粗晶区(IRCGHAZ)网状组织的构成、形成机理及对韧性的影响。
3) IRCGHAZ
临界粗晶区
1.
Metallurgical microstructure and fine structure in coarse-grained heat-affected zone(CGHAZ) and intercritically reheated coarse-grained heat-affected zone(IRCGHAZ) of in-service welding of X70 pipeline steel were investigated and compared with routine welding by means of welding thermal simulation experiment.
采用焊接热模拟试验研究了X70管线钢在役焊接粗晶区和临界粗晶区的显微组织及其精细结构,并和常规焊接进行了对比。
4) critical coarse grain heat affected zone
临界粗晶热影响区
1.
It is show that the critical coarse grain heat affected zone is the local brittle zone of X80 HAZ where the toughness is relatively low.
结果表明:临界粗晶热影响区是X80管线钢管焊接热影响区韧性较差的脆化区域;当焊接二次热循环峰值温度处于(α+γ)两相区时,形成的M-A组元的含量、尺寸、硬度较高,是引起X80管线钢局部脆化的主要组织因素。
5) supercritical pressure power unit with second reheat
二次再热超临界
1.
Study of circulation heat calculating model for thermal system in supercritical pressure power unit with second reheat cycles;
二次再热超临界机组热力系统循环吸热量计算
2.
In this paper the authors developed the heat economy calculating model of thermal system in supercritical pressure power unit with second reheat cycles by mathematical derivation strictly,used for calculation of both unit new steam making power and circulation heat,based on the normal energy balance method and basic theory of equivalent heat drop.
以常规热平衡方法和等效热降的基本理论为基础,经过严格的数学推导,建立了既能用于其单位新蒸汽作功又能用于循环吸热量计算的二次再热超临界机组热力系统通用计算模型,实例计算结果与常规法完全一致,为此类机组热经济性与局部因素的快速准确定量计算奠定了基础,并可应用于其它任何凝汽式火电机组热力系统。
6) coarse grained HAZ
热影响区粗晶区
1.
The effect of the local hard zone (LHZ) distributed in the coarse grained HAZ (CGHAZ) has been analyzed by 2-dimensional FEM on a mechanical model of the weld CGHAZ.
采用二维有限元数值方法分析了焊接热影响区粗晶区（ＣＧＨＡＺ）中局部硬化区（ＬＨＺ）的作用。
补充资料：铝合金挤压制品的粗晶环
铝合金挤压制品的粗晶环
coarse grain ring of extruded aluminium alloy product
IOheJ一nJ一yo zh1P旧de euJ一nghuon铝合金挤压制品的粗晶环(coarse grain ringof extruded aluminium alloy produet)宇吕合金加工制品缺陷的1种。挤压制品末端周边具有粗大的再结晶晶粒区，单孔模挤压呈环形，多孔模挤压呈月牙形。 粗晶环是采用无润滑正向挤压制品中固有的·种缺陷。沿挤压制品周边形成的粗大晶粒区，降低制品的抗拉强度和屈服强度，提高伸长率。如高强硬铝合金2A12(IY12)淬火自然时效状态棒材的粗晶环区(见图)，与正常区相比.纵向么降低84一92MPa，丙2降低60~64MPa才提高3%一4%。 对粗晶环的形成机理各国有许多研究，早期文献认为由于发生二次再结晶而形成;20世纪70年代以来多数研究结果证明是由于亚晶合并产生的一次再结晶形成。 影响粗晶环的因素较多，低锰的合金形成粗晶环严重，含错的合金可减轻粗晶环。铸锭均匀化退火温度高和挤压温度低，均使粗晶环区深度增加。采用反挤压、润滑挤压和冷挤压工艺可显著减轻粗晶环，甚至完全消除。降低热处理温度和缩短保温时间也可减小粗晶环深度。「肇几 高强硬招合金2八1别{_Y12)挤压棒材淬火自然 时效状态的粗晶环 (咚长清)
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