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底裂
相关语句
  bottom crack
     Steel rail has 3 rail base defects: bottom defect,scab and bottom crack.
     钢轨轨底缺陷有三种:底伤、结疤和底裂缺陷。
短句来源
  “底裂”译为未确定词的双语例句
     Application of splitting mucosal flaps in nasal floor in repair of complete cleft lip
     完全性唇裂修复术中鼻底裂缘黏膜瓣的应用
短句来源
     AN INVESTIGATION ON THE CRACK OF RAIL BASE IN ANSHAN IRON AND STEEL COMPANY
     鞍钢钢轨底裂原因的研究
短句来源
     According to diffuse instability criterion, worked out the principle of verdicting the case of base fracture or side fracture and formulae of fracture limit BHF;
     按照分散性失稳准则,推导出产生壁裂和底裂的判别条件和方盒形件成形过程中的极限压边力公式;
短句来源
     Basal crack in steel rail is a larger breakage occurred in the center of steel rail bottom.
     钢轨底裂是出现于轨底中央部分较大的破裂,严重时有底裂缺陷的钢轨达钢轨总产量的3.52%. 本文探讨钢轨底裂的基本特征及其来源;
短句来源
  相似匹配句对
     AN INVESTIGATION ON THE CRACK OF RAIL BASE IN ANSHAN IRON AND STEEL COMPANY
     鞍钢钢轨原因的研究
短句来源
     Application of splitting mucosal flaps in nasal floor in repair of complete cleft lip
     完全性唇修复术中鼻缘黏膜瓣的应用
短句来源
     A VARIABLE-POSITION TRAWL
     变位拖网
短句来源
     The City in Black
     图城市
短句来源
     (2)rifting;
     (2)陷;
短句来源
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Basal crack in steel rail is a larger breakage occurred in the center of steel rail bottom. It possesses 3.52%of annual production of steel rail. In this paper, the main characteristics and the causes of basal crack in steel rail are investigated; the main factors affecting the occurrence and the extension of it are analyzed; and the relevant measures of eliminating it are suggested.

钢轨底裂是出现于轨底中央部分较大的破裂,严重时有底裂缺陷的钢轨达钢轨总产量的3.52%.本文探讨钢轨底裂的基本特征及其来源;分析影响底裂发生和扩展的主要因素;提出消除它的相应措施.试验表明,钢轨底裂来源于钢坯裂缝,而钢坯裂缝的主要根源则是钢锭横裂.钢坯有较深裂缝的一面被轧成轨底时,由于钢轨高度方向上的压缩比较小,则钢轨发生底裂的机率较大.至于在轧制中钢锭中心部分演变成为轨底时,轨底中央金属被拉伸,而在矫直时轨底受力偏大以及APl钢裂纹敏感性较大等因素影响,对裂缝的扩展也起一定的作用.消除底裂的相应措施是:加强整模操作;初轧机采用13道次轧制制度代替11道次和增加一次翻钢;钢锭窄面固定轧成轨头和轨底;改用矩形钢坯等.目前有底裂缺陷的钢轨已降低到仅占钢轨年产量的0.01%.

Steel rail has 3 rail base defects: bottom defect,scab and bottom crack. Thespecimens taken from 20 ×50kg/m U71Mn steel rails with base defect have been analyzed bymacroscopic test, fracture test, metallograpical test, scanning electron microscope energyspectrum analysis ; a detailed description of the macroscopic and microscopic characteristics ofbase defect has been given; the arising rule and the forming cause of rail defect have beenfound out. Conducting industrial comparative test, it is found out that...

Steel rail has 3 rail base defects: bottom defect,scab and bottom crack. Thespecimens taken from 20 ×50kg/m U71Mn steel rails with base defect have been analyzed bymacroscopic test, fracture test, metallograpical test, scanning electron microscope energyspectrum analysis ; a detailed description of the macroscopic and microscopic characteristics ofbase defect has been given; the arising rule and the forming cause of rail defect have beenfound out. Conducting industrial comparative test, it is found out that Zibo No. 1 castingpowder is favourable to improve surface quality of ingots and to increase quality grade percent.

钢轨轨底缺陷有三种:底伤、结疤和底裂缺陷。取20根有轨底缺陷的50kg/mU71Mn钢轨做试样,通过低倍、断口、金相检验和扫描电镜能谱分析,详细描述了轨底缺陷的宏观和微观特征,研究出钢轨轨底缺陷出现的规律及其产生的原因。通过对比试验,发现淄博1号保护渣有利于改善钢锭表面质量,提高钢轨一级品率。

Based on the mechanical model in reference, the paper proposes the fracture criteria for bottom and wall areas of the rectangulow part, and the calculating formulae for limit blank holding force(BHF) using diffuse instability theory and the assumption of ply-anisotropy. A calculation example is presented in this paper, and the result is also discussed.

在参考文献 [1]力学建模及解析的基础上 ,以分散性失稳理论为依据 ,考虑厚向异性 ,求得方盒形件分块变压边力成形过程中出现壁裂和底裂的判别条件 ,推导出两种情况下极限压边力计算公式 ,并设计算例 ,分析验证。

 
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