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- weld metal composition 焊接金属组成
- Sometimes all that is left is a skeleton casting with weld metal. 有时所有这些问题都遗留在铸件焊接金属框架里。
- A beam of light produced by a laser can weld metals. 激光器发生的光束可以焊接金属。
- The deposited ferritic weld metal shall not contact the austenitic or high-chromium steel cladding. 熔敷的铁素体焊缝金属不应与奥氏体或高铬钢复层接触。
- Addition of activating agent has no obvious effect on fracture toughness of weld metal. 添加活性剂对焊缝金属的断裂韧性没有明显作用。
- Direct and some metal composition chlorides of chlorine under the moist circumstance. 氯在潮湿的情况下直接与某些金属合成氯化物。
- The weld metal is fine and close in structure resulting in goodlooking appearace. 焊缝细密美观;适合全位置焊接;
- Fracture toughness of heat affected zone (HAZ) was between the base metal and weld metal. 焊接热影响区的断裂韧性介于母材和焊缝金属之间。
- Direct and some metal composition chlorides of chlorine under the moist circumstance . 氯在潮湿的情况下直接与某些金属合成氯化物。
- D.McKeown, “Hydrogen and its Control in Weld Metal,” Metal Contruction, Vol. 17, No. 10, pp. 655-661, 1985. 张清辉,吴实平,洪波,焊接材料研制理论与技术,冶金工业出版社,第56-58页,民国91年。
- The TPO result indicated that the graphitization degree of the CNF depended on the active metal composition. TPO结果表明 ;Fe的存在提高了纳米碳纤维的石墨化程度 .
- The microstructure of weld metal for MAW is blocky ferrite and a little pearlite, the microstructure in the heat-affected zone is new type bainite. 手工焊焊后不热处理焊缝组织主要为块状铁素体和少量珠光体,热影响区组织为新型贝氏体组织;
- The results showed that non-metal inclusions in weld metal are round in shape and droplet are chemical reaction products in droplet stage. 结果表明焊缝和熔滴中的非金属夹杂物呈圆球形,它们是熔滴反应区化学反应的产物,属“内生”性质;
- The results of Charpy-V tests have displayed that the weld metal obtains the best toughness at a content of 0.006 wt.% of Zr. 夏比冲击韧性试验显示,锆含量在0.;006%25时焊缝金属韧性最好。
- Addition of activating agent had no obvious effect on fracture toughness of weld metal, but it improved the length of ductile crack propagation. 添加活性剂对焊缝金属的断裂韧性没有明显作用,但对延性裂纹扩展长度有所改善。
- When the oxygen content increases, the weld bead penetration and $ D/W increases sharply while the weld metal width decreases. 随着氧含量的增加, 深宽比和熔深急剧增加, 熔宽减小。
- However, as the chemistry, diffusible hydrogen level of the weld metal, restraint or section thickness increases, the demand for preheat also increases. 然而,由于化学,扩散氢水平的焊缝,克制,或切片厚度的增加,需求的预热也随之增强。
- The yield and microstructure of CNF changed with the active metal composition, which was attributed to the surface reaction between CO and active metal (alloy) together with the carbon diffusion mode on/in the metal particle. 结合纳米碳纤维的生长机理 ;认为活性组成的变化影响了CO与催化剂表面的反应和碳在金属中的扩散 ;进而影响纳米碳纤维的产率和微结构 .
- Microstructure of weld metal is characterized coarsened austenic granular crystal,and the fusion of interface is fine, crystal of overheated zone do not grows up severely. 焊缝为奥氏体组织,呈较为粗大的柱状晶形态,且与母材熔合良好;过热区的晶粒长大不严重。
- Advantageously the viscosity of the molten weld metal from which the barrier is formed is so high that it is possible to form the barriers with overhanging end profiles. 有利的粘度熔融焊缝金属的阻隔而形成如此之高,有可能构成障碍,悬垂年底概况。