The methods about controlling alloy components and increasing melt purity were presented. The methods of preventing casting crack were presented.
提出了控制合金成分、提高金属纯洁度的方法，重点提出了解决扁铸锭裂纹的措施。
Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
Large diameter sleeve of steel casting by horizontal centrifugal casting machine has been introduced with discussion of technological measures of reducing pinhole and crack in sleeve.
本文主要介绍了卧式离心机铸造大直径铸钢套筒方法，讨论了降低套筒气孔和铸造裂纹的工艺措施。
It was indicated that the linear defect appeared after machining is not crack, it is the appearance of oxide film involved in the casting under the effect of external force.
结果表明，这种加工后出现的线性缺陷并非裂纹，而是卷入铸件的氧化膜受外力作用后在叶片表面的显现。
From quality of melting metal, casting condition and casting equipment, the influence factors of crack in aluminium and its alloy slab ingot were analyzed, some suggestion have been drawn out.
从铝及铝合金的熔体质量、铸造条件和铸造设备三个方面，分析了对铝及铝合金扁锭裂纹影响的诸要素，并提出避免裂纹的措施。
The billet crack breakout would take place often in the process of continuous casting.
铸坯裂纹漏钢在连铸生产过程中经常发生。
The critical value of hot crack has been obtained according to the experiments on test casting, and it had been used on predicting the hot crack of bolster and side bearer.
在热裂试验的基础上，得到了铸件热裂纹倾向的临界值，进而实现了摇枕、侧架的热裂纹预测。
It is known that the heat crack is the most common casting defects in foundry production.
众所周知，在铸造生产中，热裂纹是一种极容易产生的铸造缺陷。
The transverse crack is one of the most serious defects in the continuous casting slab and it has much greater adverse influence on the quality of the CC slab.
铸坯上的横裂纹是连铸板坯上较严重的缺陷之一，对铸坯质量影响较大。
Concrete at interface parts was easy to crack when casting time interval was long.
当浇筑时间间隔较长时，结合面部位混凝土极易开裂。
In the paper, the hot crack for the forging die made by methods of squeeze casting is analyzed, how to reduce the hot crack is also given out.
从生产实际出发，分析了锻模液态模锻成形过程中热裂纹形成的主要原因，提出了降低锻模热裂纹的几点措。
The results show that main cause of conchoidal fracture forming is that composition segregation in solidification grain boundary of casting steel reduces the resistance of crack propagation.
结果表明，沿一次晶晶界的成分偏析对裂纹扩展阻力的降低作用是铸钢中贝壳状断口形成的主要原因。
The fatigue crack propagation testing were completed for CT specimens of LZ50 axle steels with continuous casting and mould casting.
完成了连铸和模铸LZ50车轴钢疲劳裂纹扩展试验，得到了两类LZ50车轴钢的疲劳裂纹扩展曲线。
Large area crack appearing on the surface of the aluminium alloy bakeware casting dies causes its early failure.
某厂铝合金烤盘压铸模因模面出现大面积龟裂而早期失效。
Pointing out the main reason of crack formation is that casting blank is not up to standard and the strength of parts is not enough.
指出铸造的毛坯件不合格及零件本身强度不高是产生裂纹的主要原因。
This paper mainly analyzes the process of bloom casting for heavy rail and internal cracks like central crack and so on in order to solve the internal quality problems.
对方坯重轨钢系列铸坯内部产生的中间裂、中心裂等缺陷进行工艺探索研究，以解决生产过程中出现的内部质量问题。
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。
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 reasons cause slab crack under unsteady casting have been analysed, with the measures were adopted, the rate of slab crack under unsteady casting was reduced.
分析了非稳态浇铸时导致铸坯裂纹产生的原因，通过采取相应的控制措施，成功降低了非稳态浇铸时铸坯裂纹的发生率。
According to the actual experience of company and relative reference, the mechanism and preventive countermeasure of crack of steel casting are put forward.
对照本公司的实际经验，谈呋喃树脂砂铸钢件裂纹产生的机理及预防对策。
The method and results of the study on formation condition for internal crack in continuous casting slab were reviewed.
评述了连铸坯内裂纹形成条件的研究方法和结果。
The results showed that the root reason for valve body failure was seriously casting defect exist and its big and density shrinkage porosity form the original crack;
结果得出：阀体失效的主要原因是阀体本身存在严重的铸造缺陷，铸造疏松严重、孔洞尺寸大乃于形成原始裂纹源；
Abstract: Through hardness testing, metallographic microscope analysis, and other means, the origination of crack failure of the aluminum alloy die casting die was analyzed.
摘要：通过硬度测试、金相组织观察，研究分析了铝合金压铸模具发生早期龟裂失效的原因。
This paper analyzes the common civil building site casting integrated in the reason of crack on the face and put forward relevant treatment measures.
本文系统地分析了普通民用住宅中现浇板面产生裂缝的原因以及提出了相关的处理措施。
Influence of Die Casting Process on Hot-crack and its formation mechanism of AM60B alloy are discussed.
分析了AM 60 B合金热裂纹形成的机制，讨论了压铸工艺对AM 60 B合金热裂纹的影响。
On the analysis of cause of crack in casting reinforcing steel bar and concrete board, countermeasures are put forward for reference.
通过对现浇钢筋混凝土板出现裂缝的原因分析，提出相应的预防和处理措施，供施工单位参考。
The paper describes the effective measures taken to reduce off grade product with home scrap, rhomb and horizontal crack, and consequently improving the quality of the continuously casting product.
本文介绍了转炉炼钢厂通过采取有效措施，减少退废、脱方及横向裂纹废品，提高连铸坯质量。
This paper states the viewpoint that the exceeding long temperature crack and settlement crack in concrete structure can be solved by later casting zone.
混凝土结构中经常遇到超长的问题，本文就混凝土结构超长的温度缝和沉降缝是否均可设后浇带解决的问题，阐述了自己的观点。
The casting fluidity, ratio of line contraction, casting stress and heat crack tendency were tested.
分析测定了中铬抗磨铸钢的流动性、缩孔率和铸造应力。
Therefore, site casting integrated panel crack at present, it is difficult to overcome one of the quality problems.
因此，现浇板面板裂缝，是目前较难克服的质量通病之一。
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