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:The precipitating regulation and mechanism of TCP phase (μ phase and σ phase) are studied, using electron hole number (EHN) theory, phase analysis technology and TEM observation. The results indicate... phase precipitated. Key words:superalloy; TCP phase; electron hole number; [全文内容正在添加中] ......
: Force analysis using a compact tension model, as recommended by ASTM, was carried out on a crack stop hole. The stress before, and after, drilling the hole was compared in terms of stress concentration and stress gradient. The optimum drilling location and diameter were studied through analysis of different locations and diameters. By analyzing the effects of flank holes and an additional hole......
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连铸坯表面气孔缺陷研究耿明山1,2,王新华2,张炯明2,王万军2,刘志明3(1.北京市中冶京诚工程技术有限公司2.北京市北京科技大学 冶金与生态工程学院3.广东省韶关钢铁集团有限公司 第三炼钢厂,广东韶关 512123)摘 要:通过对连铸坯和热轧板表面气孔缺陷影响因素的分析,确定了由上水口,氩封和浸入式水口3个位置吹入的氩气不能有效上浮而被凝固坯壳捕捉形成了连铸坯表面气孔缺陷.气孔基本分布在宽面靠近窄边位置,而连铸坯宽面中心和连铸坯宽面1/4位置气孔数量很少.采用不吹氩气的生产工艺可以消除连铸坯和热轧板表面的气......
Influence of delay interval on blasting efficiency of parallel hole cuts with an empty holeQi Zhang and Dachao LinDepartment of Civil Engineering, Xi’an University of Science and Technology, Xi... in the cut cavity is analyzed, a mechanical model to calculate the delay time of parallel hole cuts is presented for tunnel blasting, and a theoretical method to determine the volume ratio (the clearage......
Vector modeling of robotic helical milling hole movement and theoretical analysis on roughness of hole surfaceSHAN Yi-cai(单以才)1, 2, HE Ning(何宁)1, LI Liang(李亮)1, ZHAO Wei(赵威)1, YANG Yin-fei(杨吟飞)1(1...:To avoid the machine problems of excessive axial force, complex process flow and frequent tool changing during robotic drilling holes, a new hole-making technology (i.e., helical milling hole......
:1672-7207(2019)08-1891-10 Micro-fracture evolution rule of sandstone specimens with a single hole under uniaxial compression ZHAO Guoyan, WANG Enjie, WU Hao, QIU Ju, DAI Yiwen (School of Resources..., and the effect of hole shape on rock mechanical properties and fracture damage evolution law was studied. The results show that the compressive strength and elastic modulus of the rock are weakened......
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献标志码:A 文章编号:1672-7207(2019)04-0968-08 Effect of fissure on mechanical and damage evolution characteristics of sandstone containing hole defect ZHOU...) Abstract: In order to study the effect of fissure on the mechanics and damage evolution characteristics of rock containing hole defect, the mechanical behavior of sandstone containing hole defect......
Trans. Nonferrous Met. Soc. China 23(2013) 2524-2536 Analysis and optimization of drilling parameters for tool wear and hole dimensional accuracy in B4C reinforced Al-alloy A. TASKESEN1, K. KUTUKDE2... 2012; accepted 9 January 2013 Abstract: Cutting parameters were evaluated and optimized based on multiple performance characteristics including tool wear and size error of drilled hole. Taguchi’s L27......