The result show that the microstructure formed after thermal cycle was mainly lath bainite and granular bainite in CGHAZ .
结果表明：在不同的焊接热循环条件下，焊接粗晶区组织主要是板条贝氏体和粒状贝氏体。
As carbon content increasing, the grain coarsening of CGHAZ is inhibited, thus, the impact toughness and fatigue strength are significantly improved.
随着C含量提高，焊接粗晶区中的晶粒粗化被抑制，因此，使得冲击性能和疲劳强度被明显提高。
The results show that the dispersed second phase particles can effectively retard the growth of austenite grain in the CGHAZ, and improve the toughness.
结果表明，细小弥散的第二相粒子能有效地阻碍焊接热影响区粗晶区的原奥氏体晶粒长大，改善该区域的韧性。
Under the experiment's welding condition, WCX355 ultrafine grained steels didn't distinctly embrittle in CGHAZ and didn't soften in tempering zone either.
在试验的焊接条件下，WCX355超细晶钢在热影响粗晶区未有明显脆化，在回火区也未发生软化现象。
The complex inclusions in CGHAZ promote the acicular ferrite formation, which is associated with heat input and affects the mechanical properties of CGHAZ.
结果表明：CGHAZ中复合夹杂物可促进针状铁素体的形成，针状铁素体的数量与输入线能量有关并显著影响CGHAZ的力学性能。
Thermal simulating technology was adopted to study grain size and the precipitates distribution of CGHAZ for X80 pipeline steel with different welding condition.
采用热模拟技术研究了X80管线钢在不同焊接热循环条件下晶粒及第二相粒子的变化。
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。
Microstructure of simulated coarse grain heat affected zone (CGHAZ) of Zr Microalloyed HSLA Steel are investigated using optical microscopy and transmission electron microscopy.
采用光学显微镜和透射电镜研究了锆处理对微合金钢粗晶热影响区组织的影响。
The content of granular bainite is decreased with the decrease of carbon and carbide forming elements, and the impact toughness of CGHAZ of the steel is increased at the same time.
通过降低钢中的碳及碳化物形成元素的含量可减少CGHAZ中粒状贝氏体的数量，从而提高钢的CGHAZ的冲击韧性。
The transformation superplasticity in welding CGHAZ (Coarse Grain Heat Affected Zone) of EH36MOD steel and its effect on fatigue life have been studied with thermal simulating method.
采用热模拟方法，对EH36MOD钢焊接热影响区粗晶区(CGHAZ)的相变超塑性及其对疲劳寿命的影响进行了研究。
Owing to heat action during X80 pipeline steel welding the organization and performance of heat affected zone will change considerably in particular of coarse grain heat affected zone (CGHAZ).
X80管线钢在焊接过程中，热影响区由于受到焊接过程热的作用，其组织和性能会发生较大的变化，尤其是粗晶热影响区的组织和性能变化最大。
Owing to heat action during X80 pipeline steel welding the organization and performance of heat affected zone will change considerably in particular of coarse grain heat affected zone (CGHAZ).
X80管线钢在焊接过程中，热影响区由于受到焊接过程热的作用，其组织和性能会发生较大的变化，尤其是粗晶热影响区的组织和性能变化最大。
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