The first bell was made and tested on the ground in 1857, but a four-foot crack developed and the bell had to be cast again.
1857年制造的第一只钟在地面实验时，发现钟体上有一条四英尺长的裂缝，只好重铸钟。
High chromium possesses good abrasion resistance, but it is a kind of friable materials. Thin-walled high chromium cast iron pipes also have a tendency to crack, so it is difficult to cast.
高铬铸铁具有良好的耐磨性，但它是一种脆性材料，薄壁的高铬铸铁还有巨大的开裂倾向，铸造难度较高。
The Characteristics of laser cladding on modulated cast iron, the crack and performances of cladding layer have been investigated.
对球墨铸铁激光涂敷特点、涂层裂纹倾向及其对涂层性能的影响等进行了研究。
Hologram reconstruction using white light is employed in NDT of crack and welding quality of gray cast iron.
本文介绍将象全息的白光再现用于无损检测裂纹和灰口铸铁的焊接质量。
Effects of laser cladding parameters and content of Y2O3 on thermal crack sensibility of aeroengine blade with cast defect were studied.
研究了激光熔覆工艺参数和Y2O3含量对航空发动机叶片铸造缺陷激光熔覆开裂敏感性的影响。
The results show that graphite morphology of cast irons had great effects on initial fatigue crack and propagation behavior.
结果表明：铸铁的石墨形态对疲劳裂纹的萌生及扩展有很大影响。
Transverse corner crack is one of the most serious problems in continuous cast slab. With a great number of cracks the slab will witness serious defects and practical operation is badly influenced.
角部横向裂纹(简称角部横裂)是连铸板坯较严重的表面缺陷之一，其对铸坯的生产和质量影响很大。
Triangle crack, linearity crack and slag eye are main form of surface wrapped slag in continuously cast billet.
三角口裂纹、直线裂纹和渣孔是连铸坯表面夹渣的主要表现形式。
It was very difficult for high cr cast Fe hollow ball valve in investment casting due to its internal hollow and full close as well as high crack susceptibility.
高铬铸铁空心球阀的精密铸造难度较大，球阀内部必须空心、全封闭，同时高铬铸铁的裂纹敏感性极强。
The cause of the grinding crack on medium frequency induction hardened CAM shaft made of spheroidal cast iron was analyzed.
对球墨铸铁中频淬火凸轮轴磨削裂纹产生的原因进行了分析。
The effect of re modification and heat treatment on formation of thermal fatigue crack in low chromium wear-resistant cast iron was investigated.
研究了稀土变质及热处理对低铬耐磨铸铁热疲劳裂纹形成的影响。
The experimental results show that adding rare earth into cast semi steel can defer the time of forming fatigue crack, reduce the speed of crack propagating and increase the impact fatigue resistance.
结果表明，稀土能推迟裂纹萌生的时间，降低裂纹扩展速率，提高其冲击疲劳抗力。
Combined with the actual work, the structure crack causes of cast-in-place reinforced concrete and prevention measures are discussed.
结合工作实际，针对现浇钢筋混凝土结构裂缝的产生原因与防治方法进行了论述。
This paper introduces causation and prevention method of cast-in-place board crack in residence house.
本文介绍了现浇板裂缝产生的原因及其防治方法。
Copper nickel, good machinability bad crack resistance. Repair welding of shole gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
Directing to the serious situation in floor crack, find the reasons of appearing cast-in-situs crack and precast board crack, and put forward prevention-cure measures.
针对目前楼板出现裂缝严重的情况，找出现浇板及预制板出现裂缝的原因，并提出防治措施。
Copper nickel good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
This paper analyzes mechanism of crack development in cast-in-place concrete under combined action of concrete contraction and temperature difference.
分析现浇板因砼收缩和温差影响的组合作用裂缝的产生机理。
Crack nucleation and propagation in wear-resistant bainite ductile cast iron were investigated by press trace method and SEM.
采用压痕法及扫描电镜观察，研究了抗磨贝氏体球铁中裂纹的形核与扩展。
Based on the finite element analysis, the early crack condition of a cast-in-place reinforced concrete slab is evaluated by the crack resistant coefficient.
通过对钢筋混凝土现浇楼板的有限元分析，提出用抗裂系数来评价现浇楼板在早期的裂缝状况，并针对楼板的不同部位采用对应的裂缝评价标准。
But whether high chrome cast iron welding rod produces more crack in the overlaying process is with the relation of more horniness carbonization in its organization.
而高铬铸铁型焊条，在堆焊过程中出现较多裂纹，与其组织中有较多的硬质碳化物有关。
This paper has analyzed the reason why the cast-in-place board crack occurs and proposed preventing the measure.
本文分析了现浇板裂缝产生的原因，并提出了防治措施。
Copper nickel, good machinability and bad crack resistance. Repair welding of sand hole and gray cast iron machined surface subject to no load.
镍铜，易加工，但抗裂性较差。不受力的灰铸铁加工面及砂眼补焊。
This text makes use of a procedure of ANSYS to analysis the lading stress of the inclined crack of cast-in-place concrete slab first.
本文首先运用ANSYS有限元程序对荷载作用下板角应力进行分析。
To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
In 1857, the bell was completed and tested on the ground, but a four-foot crack appeared and the bell had to be cast again.
1857年，大本钟完工，并在地上做了测试。但是当钟要挂上去时，4尺长的裂缝就出现了。
Temperature crack control of the top wall in masonry-concrete building with cast-in-place concrete roof;
现浇砼屋面的砖混房屋中 ，由于砼与砖砌体的线膨胀系数相差一倍 ，顶层墙体容易产生温度裂缝 。
Temperature crack control of the top wall in masonry-concrete building with cast-in-place concrete roof;
现浇砼屋面的砖混房屋中 ，由于砼与砖砌体的线膨胀系数相差一倍 ，顶层墙体容易产生温度裂缝 。
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