The result shows that the velocity field changes with the increase of space from shoulder and stir tool and the flow of weld metal from top to bottom and stir zone to rotation zone also weakens.
实验结果表明：随着距轴肩和搅拌针距离的增大，速度场开始减弱，焊缝金属由顶面向底面、由搅拌区向旋转区的流动也随之减弱。
Improvement of elongation of joint is related to weaker cool deformation degree of heat affect zone (HAZ) and uniformity of strength and stress level between weld and base metal.
接头延伸率的改善同热影响区冷变形程度的减弱及焊缝强度、应力水平同母材趋于一致有很大关系。
The Charpy impact test of base metal, weld and heat affected zone of X80 grade pipeline steel of certain factory was conducted, and its effective grain was researched.
对某厂x 80高钢级管线钢母材、焊缝、热影响区进行了夏比冲击韧性试验，对其有效晶粒进行了研究。
Weld metal zone are mostly acicular ferrite which can improve the weld zone toughness.
焊缝金属区晶粒分布均匀，焊缝金属区多为针状铁素体，能够提高焊缝区的韧性。
The microstructure in weld metal, heat affected zone (HAZ) doesn't change, but the grains in HAZ grow up.
焊缝金属、热影响区中的微观组织基本没有变化，但热影响区组织晶粒略有长大趋势。
The properties in weld deposit metal and Heat Affected Zone are strictly homogeneous with the base metal.
在焊接性能和热影响区金属矿床严格均匀与金属基材。
After solution treatment, the weld grains become coarse along with a large amount of granular precipitates dispersed in weld zone and base metal zones.
经过固溶处理后，焊缝组织晶粒变大，焊缝区和母材区弥散分布着大量的颗粒状析出物。
Micro characteristic of cracks propagation research: the path of crack propagation in the heat-affected zone and weld metal is the mix of transgranular and intergranular.
裂纹扩展的微观特征研究：在热影响区与焊缝区的裂纹扩展均为沿晶与穿晶混合型。
The appearence characteristics of the heterogenous mixture zone near the bottom of weld metal in the fusion welded joint are studied through metallographic observations of many fusion welded joints.
通过时大量熔化焊接头的金相观察，研究了熔化焊接头焊缝底部附近“不均匀混合区”的形貌特征。
The results show that the TIG weld joint of ZM5 magnesium alloy is composed of heat affected zone, partially melted zone and weld metal.
结果表明：ZM5合金TIG焊接接头是由热影响区、部分重熔区和焊缝组成。
Metallurgical tests of cross-sectional weld samples indicate a minimal heat-affected zone that is identical to the parent metal.
剖焊样品的金相检验表明，成品的最小热影响区与母体金属完全相同。
The fracture toughness of the weld metal is lower than that of the base metal and the fracture toughness of heat-affected zone (HAZ) is intervenient between those of weld metal and base metal.
接头焊缝金属的断裂韧度显著低于母材，而热影响区断裂韧度则介于母材和焊缝金属之间。
The basic requirement of welding the steel 2205 is that the weld metal and heat-affected zone obtain a favorable phase balance and retain the performance as the base metal after welding.
平衡铁素体和奥氏体两相组织在焊缝金属和热影响区中的比例，保证焊接接头的性能，是双相不锈钢焊接的基本要求。
The coarse primary ferrite appeared in weld metal, and coarse bainite appeared in heat-affected zone under larger heat input welding condition, which caused low...
在较大焊接热输入条件下焊接，焊缝金属产生粗大先共析铁素体、过热区产生粗大粒状贝氏体，焊接接头低温冲击韧性因此降低。
The tensile strength and the elongation percentage of the parent metal and the weld zone increased slightly.
冲击处理使焊缝区和母材区的强度和伸长率均有所增加。
Moreover, the fatigue crack growth rates of the weld metal and heat affected zone are lower than those of the base metal. Having excluded the effect of welding residual tress...
在排除焊接残余应力导致的裂纹闭合效应后，焊缝及热影响区疲劳裂纹扩展速率与基材相当。
The results show that:under the no preheating condition, the microstructure of weld metal is columnar austenitic, and brittle martensite exists in the fusion zone and over-heated zone unavoidably.
研究结果表明：在不预热条件下，用KD286焊补钢轨，焊缝组织为柱状奥氏体组织，熔合区和过热区不可避免地产生脆硬的马氏体组织。
The tensile strength of welded joint is significantly improved after heat treatment and the failure occurred far away from the weld metal zone.
焊接接头抗拉强度大幅度提高，断裂均处在远离焊缝的母材上。
The tensile strength of welded joint is significantly improved after heat treatment and the failure occurred far away from the weld metal zone.
焊接接头抗拉强度大幅度提高，断裂均处在远离焊缝的母材上。
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