Its results show that with decreasing the relative width of under-matching weld metal, the tensile strength of welding joint increase.
结果表明：随低强焊缝金属相对宽度变小，接头抗拉强度增大；
Crystallinity, hardness, tensile strength and impact toughness of fusion welding joint of polyethylene pipes are tested and analyzed.
测试和分析了聚乙烯管道热熔对接焊接头的结晶度、硬度、拉伸性能和冲击性能，并与基材的性能进行了比较。
Crystallinity, hardness, tensile strength and impact toughness of fusion welding joint of polyethylene pipes are tested and analyzed.
测试和分析了聚乙烯管道热熔对接焊接头的结晶度、硬度、拉伸性能和冲击性能，并与基材的性能进行了比较。
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