By means of chemical composition analysis , hardness testing , non - metallic inclusion examination , metallographic examination , macro and micro - fractography fracture analysis were conducted 对剃齿刀断口进行了宏、微观检验、化学成分分析、硬度测试和非金属夹杂物及显微组织检验。
The above - mentioned research results will supply valuable foundation of theory and experiment for ultrasonic detection of small inclusions and hardening particles density 论文的上述研究成果，对于进一步开展ly12铝合金细小夹杂物及强化粒子密度的超声检测提供了重要的理论及实验依据。
The observation and analysis for the tensile fracture of hot rolled plate by sem and eds is a valid method to discover the influence of the inclusions in the plate on the elongation 摘要应用扫描电子显微镜及能谱仪对热轧中板拉伸断口进行形貌观察和夹杂物类型分析，以探讨热轧中板中夹杂物对其伸长率的影响。
The results shcw that the aggregation of inclusions is the internal cause of copper pipe cracking while the thermal stress formed during welding and bending deformation are another two important factors 结果表明，夹杂物局部偏聚是铜管断裂的内在原因，焊接时产生的热应力及弯曲变形是铜管断裂的外部诱发因素。
The microscopic scanning of the fracture shows that the fracture is not a brittle one , and the qualitative analysis of the inclusions points to the absence of nitrides and carbonitrides in the inclusions 通过断口的微观扫描及夹杂物定性分析发现，断口未出现脆性断裂的特征以及夹杂物分析未发现有氮化物和碳氮化物存在。
It was analyzed by means of metallographical examination , chemical composition analysis and inclusion testing , the results show that the fracture was mainly caused by no - metallic inclusion 通过对层裂坯料进行宏、微观检验、化学成分和夹杂物分析，认为大颗粒硫化物夹杂及其富集破坏了基体的连续性，是镦制过程中产生裂纹的主要原因。
Abstract : water modeling of the six - strand caster tundish shows that the original design of the tundish can not meet the technical requirements for inclusion floatation and temperature homogenization 文摘:通过水力学模拟六流连铸中间包后发现，原设计的中间包在夹杂物的上浮及温度的均匀性方面还存在不足，不能很好地满足生产工艺要求。
A breakdown model of dielectrics , which exists some blemish inside or on the surface , such as hole , impurity and heave at which breakdown probability is larger than that at other points , was established 建立了含有缺陷点的绝缘介质击穿模型，指出电缆绝缘层内部及表面存在空洞、夹杂物和隆凸不平是缺陷产生的内在因素，缺陷点处的击穿概率较大。
The measures taken in the control of c , n , h , t o and modification of inclusions in steel , as well as the effects of these measures on if steel and the steel for petrolem pipeline are discussed 描述了在钢中碳、氮、氢、硫和总氧的控制和夹杂物的变性处理上采取的措施、目前达到的水平,以及这些措施在if钢和石油管线钢上的应用效果。
Abstract : the paper discusses the forming reasons of magnesia which is the main non - metallic inclusions in rare earth magnesium ferrosil icon alloy and harmful . the methods of reducing magnesia in the alloy have been p roposed 文摘:本文论述了稀土镁硅铁合金中主要非金属夹杂物?氧化镁的生成原因及其对应用的危害，提出了降低合金中氧化镁的方法。
