• The bolt fastening metal structure of tower crane and pin structure without deformation, no weld crack.

    塔吊紧固金属结构联接螺栓销轴,结构件不得变形,焊缝不得有裂纹。

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  • An expert system of welding crack diagnosis based on knowledge base is posed according to the analysis of characteristic of weld crack.

    分析焊接裂纹特点出发,提出了基于知识库的焊接裂纹诊断专家系统

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  • The hydrogenation pipe would weld crack after running for some time as high temperature and high pressure, and the phenomenon was rare.

    高温高压管道运行时间发现多道焊缝裂纹较为罕见。

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  • Some new technologies such as infrared thermal imaging, laser holography and microwave testing were prospected in the testing of weld crack.

    红外成像检测激光全息检测微波检测技术焊接裂纹检测中的应用进行了展望。

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  • 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,不时罐体梁腹板立焊缝裂纹报告

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  • 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焊接裂纹诊断专家系统可以得到专家同样诊断结果

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  • 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.

    通过螺旋埋弧焊管内焊缝成型焊接过程分析指出焊缝裂纹产生焊接熔池脆性温度

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  • The application status of magnetic particle testing, penetrant testing, eddy current testing, radiographic testing and ultrasonic testing in weld crack inspector were introduced.

    介绍了检测渗透检测、涡流检测、射线检测超声波检测技术焊接裂纹检测中的应用状况

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  • 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.

    不同焊接方法,对坯料前作不同工艺处理,焊接成形出现焊缝开裂坯料开裂焊缝作显微分析

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  • 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.

    由于焊缝部位存在焊接缺陷采用传统建立在构件缺陷、无裂纹基础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安全性

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  • 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.

    给出高强钢表面裂纹压弯组合应力应力强度因子及其疲劳寿命计算式。

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  • Weld Area crack. A crack in or immediately adjacent to the weld line.

    焊缝裂纹焊缝线靠焊缝线出现的裂纹。

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  • 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.

    给出高强钢表面裂纹压弯组合应力应力强度因子及其疲劳寿命计算式。

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  • Crack propagation conducts alternatively between the weld zone and the partially molten zone, and is not strictly to rupture at W/F boundary surface.

    裂纹扩展焊缝熔化之间交替进行,并非严格W/F界面断。

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  • 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概念

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  • 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.

    得到镍基喷焊元素奥氏体焊缝显微组织裂纹敏感性影响规律

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  • 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、高纯净度保护控制线能量措施消除了蒙乃尔合金焊接中的气孔裂纹,保证了产品焊接质量。

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  • 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管材热板焊接接头变柔量,研究了蠕变焊缝应力场影响

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  • 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.

    本文将高匹配焊缝热影响区(haz)淬纵向裂纹焊接接头简化硬夹层含平行裂纹力学不均匀体模型

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  • The fatigue crack propagation rate of the fusion line and weld toe are greater than that of the others.

    熔合线疲劳裂纹扩展速率其他部位

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  • 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非金属夹杂物,低应力作用形成微裂纹成为源,加之焊缝组织中存在大量MA结构群,从而发生焊缝金属室温下的解理断裂

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  • 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.

    焊缝枝晶间显微疏松导致应力集中裂纹效应以及近焊缝区母晶粒长大是导管早期疲劳开裂的主要原因。

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  • 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.

    二滩水电站全部投运6机转轮经停机检查,现场焊接的焊缝裂纹

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  • 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.

    针对电站锅炉焊缝未融合引起裂纹进行分析提出缺陷修复的办法。

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  • 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.

    输管道生产中由于管端几何形状误差引起对接焊缝缺陷造成应力腐蚀断裂的主要原因之一。

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  • 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焊缝识别处理机研究了无损检测中的超声tofd检测的缺陷定位算法

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  • 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.

    消除LY 12 CZ铝合金激光焊接时焊缝常见的气孔裂纹缺陷通过正交实验优化了激光功率扫描速度、保护气体流量工艺参数,采取适当的焊前预处理工艺

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  • 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.

    消除LY 12 CZ铝合金激光焊接时焊缝常见的气孔裂纹缺陷通过正交实验优化了激光功率扫描速度、保护气体流量工艺参数,采取适当的焊前预处理工艺

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