The toughness of weld metal is the highest while the coarse grained region in the HAZ is the lowest because of welding thermal cycle and formation of brittle microstructure.
试验钢由针状铁素体和少量块状铁素体组成，焊缝为典型的针状铁素体组织，焊接热影响区粗晶区以粒状贝氏体为主。
The welding thermal cycle and section dimensions of the welding seam were measured in the condition of the simulated welding process parameters for checking simulation results.
采用模拟时的焊接工艺参数进行钨极氩弧焊平板对接焊，测定焊接热循环曲线和焊缝截面尺寸，对模拟结果加以验证。
A new type of computer-aided testing and analyzing system for welding thermal cycle is presented in this paper. The system adopts computer technology and data processing methods.
采用计算机软、硬件技术和数据处理方法，研究和开发了一种新型焊接热循环测试与分析系统。
The influence of welding thermal cycle on structure and properties in grain-coarsening region of X80 pipeline steel was investigated by weld thermal simulation technique and the charpy test.
采用焊接热模拟试验和冲击试验，研究了X80管线钢焊接热循环对粗晶区组织性能的影响。
Welding thermal simulation technique is adopted to study the influences of twice thermal cycle on the structure and properties of X80 pipeline steel.
采用模拟焊接热循环的方法，研究了二次热循环对X80级管线钢焊接热影响区组织和性能的影响。
The influences of welding process parameter and twice thermal cycle on the microstructure and properties of X80 pipeline steel are also investigated in this paper.
本文还研究了焊接工艺参数和二次热循环峰值温度对实验钢x 80组织性能的影响规律。
The peak temperature of the thermal cycle reduces with the increase of welding speed.
焊接热循环的峰值温度随焊接速度的增大而降低。
Weld thermal cycle simulation was used to reproduce the structure in the HAZ of single run and multi-layer welding.
采用焊接热模拟再现了单道焊和多层焊haz的组织。
Welding thermal simulation technique is adopted to study the influences of twice thermal cycle on the structure and properties of X80 pipeline steel.
通过焊接热模拟试验和冲击韧性试验，研究了不同预热温度对X80级管线钢组织性能的影响。
Welding thermal simulation technique is adopted to study the influences of twice thermal cycle on the structure and properties of X80 pipeline steel.
通过焊接热模拟试验和冲击韧性试验，研究了不同预热温度对X80级管线钢组织性能的影响。
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