【摘 要】
：
In this paper, NiCrSiB and CoWC35 powder has been used in laser cladding of gray cast iron. The cracking tendency has also been discussed. The cracks have been
【机 构】
：
School of Materials Science and Engineering,Engineering Training Center
论文部分内容阅读
In this paper, NiCrSiB and CoWC35 powder has been used in laser cladding of gray cast iron. The cracking tendency has also been discussed. The cracks have been observed with a scan electron microscopy to analyze the cracking mechanism. The results show that cracks have not appeared in NiCrSiB cladding. Nevertheless, the cracking tendency of CoWC35 cladding is extremely high and there are both cold cracks and hot cracks in the cladding. The cracking tendency of laser cladding depends on physical properties of the cladding material and plasticity and roughness of the cladding.
其他文献
张代钊教授从中医理论出发,认为癌症属阴积、属久病,治之宜温,但久用有耗阴伤津之弊,温阳不能妄投,治癌重在调理脾胃.抗癌消瘤周期长,用药以平为贵:适用滋腻碍胃之品；慎用苦寒
目的:观察降压效灵煎治疗顽固性高血压的临床疗效.方法:将80例患者随机分为治疗组和对照组,各40例.对照组常规降压治疗(口服福辛普利10 mg/次,1次/d;硝苯地平缓释片30 mg/次,
大多数学者认为,强直性脊柱炎是由于先天禀赋不足,素体虚弱,肝肾不足,肾督亏虚,风寒湿之邪乘虚侵袭肾督,筋脉失调,骨质受损而成.从目前来看,强直性脊柱炎的辨证分型尚不统一,
血脑屏障对维持中枢神经系统(CNS)内环境的稳定起着重要的作用,在脑缺血再灌注损伤过程中血脑屏障发生改变影响CNS的稳定性,药物通过干预血脑屏障改变和改变其进入血脑屏障的
慢性阻塞性肺疾病急性加重期的治疗西医以导泻、雾化吸入联合仪器等为手段,以抗感染治疗为主要方法；中医辨证论治,以平肺化瘀、清热化痰、通阳宣痹、益气固本为主.另外,经络腧
扩大额下入路较传统额下入路及眶上锁孔入路具有暴露范围广、术野清楚、不易损伤神经、术后复发率低、便于颅底重建等特点,该入路治疗前颅窝底缺损、脑脊液漏方法可靠.与传统
基于结构保持的多机电力系统拓扑暂态能量函数,分析了故障后暂态势能在网络中的分布变化特点,提取出基于网络信息的系统失去稳定时的关键特征量,以构建仅依赖网络信息的以支
定义一种固粒击靶的有效冲击摩擦系数为粘着项与犁沟项的组合,其中包含表征剪切金属结合点的状态-滑动或滚动的状态参数以及表征冲击物在击靶过程中产生犁沟效应的状态参数.
微波辐射计具有全天时全天候的工作能力,可提供红外、可见光不能提供的信息。然而提高微波辐射图像的质量是一个急需解决的关键问题。针对简单场景,研究了波段相差极大的多传感器图像的融合算法,提出利用小波变换将基于光学的模拟毫米波图像和实测毫米波辐射图像的相关信息进行融合,合成的图像可作为精确制导中地图匹配的标准地图。仿真结果表明:融合图像包含了模拟图像和实测图像的更多互补信息,在一定程度上提高了图像的分辨
Multi-layer laser cladding manufacturing is a newly developed rapid manufacturing technology. It is a powerful tool for direct fabrication of three-dimensional