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| 1 | Achieving superior mechanical properties in friction lap joints of copper to carbon-fiber-reinforced plastic by tool offsetting显示文摘It is a challenge to achieve a sound welded metal/carbon-fiber-reinforced thermoplastic(CFRTP) joint with high strength and few bubbles. In this study, sound lap joints of Cu and CFRTP were obtained by friction lap joining(FLJ) directly at rotation rates of 600-2000 rpm, with the welding tool at the joint center and offsetting the tool 7 mm away from the center toward the retreating side, respectively. Tool offsetting reduced the non-uniform temperature distribution in the lap joints resulting from the high conductivity of Cu, which not only enhanced the tensile shear force from 0.89-2.25 kN to 1.71-3.54 kN,with the maximum increasing rate of 135%, but also reduced the bubble area to only 19% of the original level of 2000 rpm. It is the first time to report a high-quality Cu/CFRTP joint with a high strength and few bubbles. The large increase of the strength after tool offsetting was attributed to the increase of the joining area, the decrease of bubbles and the decrease of the CFRTP degradation. The details on the generation,quantitative distribution and expulsion of the bubbles in the FLJ joints were discussed. | L.H.Wu K.Nagatsuka K.Nakata | 2018 | Journal of Materials Science & Technology2018，34，9： | 9 |
| 2 | 高热效率的低燃油耗技术ESTEC显示文摘混合动力车上市距今已近20年,这一技术为全球CO2减排作出了重大贡献。众多研究都致力于使混合动力发动机达到最低燃油耗(即最高热效率),可通过控制发动机运行区域达到这一要求。同时,考虑到气候变化和能源问题,关注常规车型的低燃油耗研究进展也同样重要。采用高压缩比的阿特金森循环是提高混合动力发动机热效率的常用方法,但缺点是会造成发动机扭矩下降。相比混合动力发动机,常规发动机的低负荷工况热效率更加重要,因此必须克服上述问题。介绍具有高热效率的低燃油耗技术ESTEC,叙述其实现高热效率的途径,以及将该技术用于常规发动机的具体方法。 | T.Yamada S.Adachi K.Nakata T.Kurauchi I.Takagi 陈荣峻 | 2015 | 国外内燃机2015，47，2： | 3 |
| 3 | 整体低压涡轮转子轴锻件的制造显示文摘本文涉及核电站用整体低压涡轮转子锻件的制造成就和日本铸锻件公司应用于生产的先进技术。这种发货重量达110t的转子锻件是由410t钢锭制造的大型锻件,而获得的性能满足于质量要求。 | K.Sato Y.Ohno K.Soeda K.Nakata 懦夫 | 1986 | 大型铸锻件1986，，2： | 0 |
| 4 | 用硼化技术硬化金表面显示文摘金有许多优异性能,其中尤以柔软、可加工成金箔制成多种形状复杂的物品见长。但是,柔软也同时给金制品带来了必然的缺陷—易磨损。金制品表面的擦痕必然降低金制品的价值。因此,黄金的表面硬化技术是人们探索已久,但迄今尚无成熟的方法。 | F.Matsuda K.Nakata 龚心若 | 1991 | 黄金科技动态1991，，6： | 0 |
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