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The longitudinal cracking is promoted by uneven heat flux, the average heat flux and temperature of copper pates are important factors for cracking. 结晶器壁热流不均是纵裂纹产生的有利环境，铸坯表面产生裂纹和没有裂纹时，二者的平均热流和铜板温度存在明显的差异。
It is concluded that the original crack of billet is the root of the side longitudinal crack of jobbing sheet. 确认了板坯原始裂纹是造成中板边部纵向裂纹的根源。
The longitudinal crack on the surface of Q235 jobbing sheet is examined and analyzed during production. 通过生产试验,对Q235中板表面纵向裂纹进行检测和分析。
Some measures have been taken to control the longitudinal crack of peritectic steel by analyzing the causes. 通过分析包晶钢纵裂纹形成的原因,并采取相应的措施,使包晶钢的纵裂纹得到有效控制。
Causes for surface longitudinal cracking on near net shape beam blanks during casting at Laiwu Steel were analyzed from both operation and equipment aspects. 对莱钢近终形异型坯腹板表面纵裂问题进行了分析,找出了工艺和设备方面的影响因素,采取了相应的改进措施。
The results show that the surface longitudinal crack of hot-roll Q345B medium plate is caused by inclusion and surface longitudinal crack of slab. 结果表明,热轧Q345B中厚板表面纵裂纹是由于铸坯中存在夹杂物及铸坯纵裂引起的。
We analyse the formation Cause of longitudinal crack of the strip in double - roll strip continuous casting using metallographic technique and electron microprobe. 用金相技术结合电子探针对双辊薄带连铸带坯的纵裂纹成因进行了分析。
The cause to the longitudinal crack at the comer of CC billets of Xinyang Iron &Steel Co.,is analyzed and measures to control and solve the defect proposed. 分析了信钢小方坯产生角部纵裂的原因,并提出了控制与解决措施。
The surface longitudinal crack of hot-roll Q345B medium plate was studied by means of metallographic microscopy,scanning electron microscopy and energy spectrum analysis. 采用金相检验和扫描电镜及能谱分析等手段对热轧Q345B中厚板表面纵裂纹进行了分析。
The longitudinal crack rate of peritectic steel is much higher than other steel grades since wide slab was put into production at Wide Plate/Coil Plant. 根据中厚板卷厂连铸宽板坯投产以来的生产实践,包晶钢的纵裂纹发生率远高于其它钢种。
Longitudinal crack formed when screw steel rebar is cold-bended was analyzed. The result indicates that ununiformly distributed silicate inclusions contributed to the longitudinal crack. Protective measurements were also provided. 摘要对螺纹钢筋由冷弯产生的纵向裂纹进行了分析，结果表明，硅酸盐夹杂物分布不均匀是造成螺纹钢筋冷弯纵向裂纹的主要原因，并提出了相应的预防措施。
Through proceeding the macroscopical observation and SEM to the longitudinal crack on plate surface, we find that the crack on the plate across section is intend to expand to inner of the plate. 用光学显微镜和电子显微镜对中厚板轧后出现的表面纵裂纹进行了观察和分析。
Its stability is destroyed with longitudinal cracks of embankment caused by asymmetric settlement of permafrost. 由于阴阳坡差异引起路基不均匀沉降而导致的路面纵向裂缝病害严重影响了路基的稳定性。
Experimental study on the longitudinal cracks of 41 corroded reinforcement concrete beams in atmospheric environment is carried out. 摘要对大气环境中41根钢筋混凝土梁的锈蚀顺筋裂缝规律进行试验。
It is easy to cause longitudinal cracks in and depressions on slab cast with high(overheat) and strong secondary cooling. 浇铸亚包晶钢时钢水过热度高,在较强的冷却制度下会促进铸坯表面形成凹陷和纵裂。
A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
transversed and longitudinal crack 纵横向裂纹
Keywords Crack Longitudinal crack Metallograph; 开裂;纵裂纹;金相;
The marchers jumped off at the crack of dawn. 行军队伍在破晓时出发了。
The riot police started to crack down on them. 防暴警察开始对他们采取镇压行动。