The bolt fastening metal structure of tower crane and pin structure without deformation, no weld crack.
塔吊的紧固金属结构的联接螺栓和销轴，结构件不得有变形，焊缝不得有裂纹。
An expert system of welding crack diagnosis based on knowledge base is posed according to the analysis of characteristic of weld crack.
从分析焊接裂纹的特点出发，提出了基于知识库的焊接裂纹诊断专家系统。
The hydrogenation pipe would weld crack after running for some time as high temperature and high pressure, and the phenomenon was rare.
高温高压临氢管道运行一段时间发现多道焊缝裂纹，较为罕见。
Some new technologies such as infrared thermal imaging, laser holography and microwave testing were prospected in the testing of weld crack.
对红外热成像检测、激光全息检测和微波检测新技术在焊接裂纹检测中的应用进行了展望。
Since the beginning of mass production of G70 in 1997 in Xi'an Rolling Stock Works, there has been report on weld crack on bolster web now and then.
西安车辆厂自从1997年开始批量生产G70一来，不时有罐体枕梁腹板立焊缝裂纹的报告。
It is proved by application that the expert system of weld crack diagnosis based on knowledge base can achieve the same diagnostic result as the expert.
应用证明基于知识库的焊接裂纹诊断专家系统可以得到与专家同样的诊断结果。
Through analysis on inside weld forming and welding procedure of SSAW pipe, it pointed out weld crack is easy to appear in brittle temperature zone in welding pool.
通过对螺旋埋弧焊管内焊缝成型和焊接过程的分析，指出焊缝裂纹易产生在焊接熔池脆性温度区。
The application status of magnetic particle testing, penetrant testing, eddy current testing, radiographic testing and ultrasonic testing in weld crack inspector were introduced.
介绍了磁粉检测、渗透检测、涡流检测、射线检测和超声波检测技术在焊接裂纹检测中的应用状况。
To do mycology analysis to the blank parent and its cracking weld for different procedure treatment to the blank before welding and occur weld crack during welding forming by different welding method.
用不同焊接方法，对坯料焊前作不同工艺处理，焊接成形时出现焊缝开裂，对其坯料母材及开裂焊缝作显微分析。
Since there are weld defects in welds, using traditional strength theory based on no defect and no crack to design, crane's security in rating load can't be insured.
由于在焊缝部位存在焊接缺陷，采用传统的建立在构件无缺陷、无裂纹基础上的强度理论进行设计计算时，往往不能确保起重机在额定载荷下使用的安全性。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses were given out.
给出了高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
Weld Area crack. A crack in or immediately adjacent to the weld line.
焊缝区裂纹。在焊缝线或紧靠焊缝线出现的裂纹。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses have been presented.
给出高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
Crack propagation conducts alternatively between the weld zone and the partially molten zone, and is not strictly to rupture at W/F boundary surface.
裂纹扩展在焊缝区和半熔化区之间交替进行，并非严格按W／F界面破断。
It puts forward a conception of weld inclusions crack index so as to better control quality of weld seam.
为了更好地控制焊缝质量，提出了焊缝夹杂物裂纹指数的概念。
The influencing rules of the content of alloy elements in nickel-base spraying layer on the microstructure of austenite weld and the crack sensitivity were found.
得到了镍基喷焊层元素熔入量对奥氏体焊缝显微组织及裂纹敏感性的影响规律。
By strictly clearing up weld zone, improving welding material's purity, strengthening molten pool's shield and controlling energy input etc measures, weld zone's hot crack and blowhole were prevented.
采取严格清理焊接区、高焊材纯净度、强熔池保护及控制线能量等措施消除了蒙乃尔合金焊接中的气孔和热裂纹，保证了产品焊接质量。
In this paper, the creep compliance of Hot-plate welded joint of PE80 pipe is measured, and the effect of creep on the crack tip stress field in the weld is investigated.
本文测定了燃气用PE80管材热板焊接接头的蠕变柔量，研究了蠕变对焊缝裂尖应力场的影响。
In the paper welded joints with a crack in transverse overmatched weld or HAZ were simplified into a model in which a transverse hard layer contains a crack parallel to the interfaces.
本文将高匹配焊缝或热影响区(haz)淬硬层中含纵向裂纹的焊接接头简化为硬夹层含平行裂纹的力学不均匀体模型。
The fatigue crack propagation rate of the fusion line and weld toe are greater than that of the others.
熔合线和焊趾处疲劳裂纹扩展速率较其他部位大。
The results showed that nonmetallic inclusions in weld seam served as crack initiation site under external bend load, and large amount of m a structure resulted in cleavage fracture of weld seam.
结果表明，焊缝金属中存在的非金属夹杂物，在低应力作用下形成微裂纹成为裂源，加之焊缝组织中存在大量的MA结构群，从而发生焊缝金属在室温下的解理断裂。
The results show that the crack initiates at the outer surface of the weld comer and propagates into the steel base material with a high cycle fatigue mode.
钎焊焊缝的枝晶间显微疏松导致的应力集中与微裂纹效应以及近焊缝区母材晶粒长大是导管早期疲劳开裂的主要原因。
The runners of 6 operated generating unit of Ertan Hydro Station have been checked and no crack on the primary weld of the field welding position is observed.
二滩水电站已全部投运的6台机转轮经停机检查，现场焊接的主焊缝无裂纹。
Analyses the cause for the crack resulting from the non-fusion in the longitudinal weld seam of a power plant boiler cylinder, and suggests corrective actions to eliminate the defect.
针对一台电站锅炉锅筒纵焊缝未融合引起的裂纹进行分析，并提出缺陷修复的办法。
In the long pipeline, because the end surfaces of the welded pipes have the geometrical errors which induce the butt weld defects, the stress corrosion crack will occur.
在长输管道生产中，由于焊管管端几何形状误差而引起的对接焊缝缺陷是造成应力腐蚀断裂的主要原因之一。
This paper focuses on the design and implementation of et weld detecting system and the research of TOFD crack localizing algorithm in non-destructive testing area.
本文主要设计开发了基于无损检测中涡流检测的焊缝识别处理机和研究了无损检测中的超声tofd检测的缺陷定位算法。
Through orthogonal experiment, laser power, scanning rate and gas flow were optimized and pretreatment techniques were adopted to cancel pore and crack in laser weld of LY12CZ.
为消除LY 12 CZ铝合金激光焊接时焊缝中常见的气孔和裂纹缺陷，通过正交实验，优化了激光功率、扫描速度、保护气体流量等工艺参数，并采取适当的焊前预处理工艺。
Through orthogonal experiment, laser power, scanning rate and gas flow were optimized and pretreatment techniques were adopted to cancel pore and crack in laser weld of LY12CZ.
为消除LY 12 CZ铝合金激光焊接时焊缝中常见的气孔和裂纹缺陷，通过正交实验，优化了激光功率、扫描速度、保护气体流量等工艺参数，并采取适当的焊前预处理工艺。
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