The samples are took from the ethylene cracking tube which split and failed before it worked 14,000 hour.
4万小时就开裂失效的乙烯裂解管上取样，进行组织、成份和性能的观察与测定。
A residual life predication method of cracking tube is proposed taking account of the creep damage and the thinning damage of the tube.
提出了考虑裂解管蠕变损伤和减薄损伤的剩余寿命预测方法。
The ethylene cracking tubes pack-carburized in a laboratory(P tube) and carburized during servicing in a cracking furnace (S tube) are studied.
对实验室固体渗碳（P管）和裂解炉运行渗碳（S管）的乙烯裂解管进行了研究。
The macro, chemical and metallographic analysis have been performed on the cracking failures of reformer tube for hydrogen generation.
针对制氢转化炉炉管多次开裂失效的情况，进行了宏观分析、化学分析以及金相分析。
The cracking causes of a U shaped tube heat exchanger were analysed in material compositions, microstructure, properties with the help of optional microscope and SEM.
借助光学和扫描电子显微镜，从材料成分、微观组织和性能角度，分析了U形管换热器开裂原因。
The gas phase oxidative cracking (GOC) processes of decalin and cyclohexane were investigated by using the quartz tube reactor at atmospheric pressure.
采用石英管反应器，在常压下研究了十氢萘和环己烷的气相氧化裂解(GOC)过程。
The rupture reasons of tube joint weld of the stainless steel pressure meter are analyzed. It is characteristic of stress corrosion cracking and inter granular fracture.
分析了不锈钢压力表管接头焊缝开裂的原因，认为此种开裂具有应力腐蚀开裂、沿晶断裂特征。
The cracking of TV tube inside the exhausting furnace is all along a headache problem for many CTV tube plants.
排气炉内管子炸裂一直是各彩管厂头痛的问题，由于引起炸裂的原因复杂，涉及的因素众多。
After visual inspection and metallographic test, analysis and discuss the welding zone cracking reasons for 6061 and A7003 aluminum alloy thin-walled tube after TIG (argon shielded arc) welding.
通过宏观及微观检测，分析了6061铝合金管及A7003铝合金薄壁管经TIG(氩弧)焊后的焊接区开裂的原因。
In the light of bending of radiation tube in cracking furnace, analysis is done in detail to present related prevention, adjustment and correction measures.
针对乙烯装置裂解炉运行中比较普遍存在的辐射段炉管弯曲现象进行了详尽的分析并提出了相应的预防、调整和矫正对策。
A boiler tube cracked after only one month service. This kind of ephemeral cracking behavior was studied in this paper using optical microscope.
锅炉管在使用一月后，发生爆裂，使用金相显微镜对这种短期的爆裂行为进行了研究。
The shark's finned tube has an extensive application prosperity for cracking furnace.
翅片管在裂解炉有广泛的应用前景。
It was concluded that the cl ion in the oil glue resulted in stress corrosion cracking of the pure copper tube.
结果表明，紫铜管渗漏系腐蚀引发裂纹所致，而涂在铜管表面的油胶中的氯离子是引起紫铜管应力腐蚀开裂的主要因素。
Abrasion and corrosion of heating surface, superheater tube cracking and weld leakage are the main cause of waste heat boiler breakdown in sulphuric acid plant.
硫酸废热锅炉故障主要是由受热面管子的磨损、受热面的腐蚀、过热器爆管及焊缝漏水等引起的。
We normally use the punch or hydraulic machine to expand the steel tube, but since the impetus and velocity is difficult to control, the cracking rate of expanding the steel tube reaches to over 10%.
钢管扩管通常采用冲床或液压机来加工，但由于冲力和速度难以控制，扩管破裂率达10%以上。
The results showed that the major cause of longitudinal surface cracking of 20 steel tube blanks was higher nonmetallic inclusion content in the steel than standard value.
结果表明：非金属夹杂物超标是导致管坯表面产生纵向裂纹的主要原因。
The burst part in convection section of a tube of F108 cracking furnace in alkene factory, Liaoyang Petrochmical Company, was analyzed.
针对辽阳石化分公司烯烃厂f 108裂解炉对流段炉管爆裂破坏进行了分析。
This paper was the second part of an article on mathematical modelling of cracking furnace tube.
本文为重质油裂解模型的第二部分。
There exist problems of cold-working hardening and hydrogen-brittle in the cold-drawing process for seamless steel tube, responsible for the cracking in the steel tube.
在无缝钢管的冷拔过程中，存在着冷作硬化和氢脆现象，它们是造成钢管开裂的主要原因。
Field examination of tube fracture of ethylene cracking furnace for a certain ethylene plant is carried out. The fracture reason is researched. The repair proposal is put forward.
对某乙烯厂乙烯裂解炉炉管断裂进行了现场检测，探讨了断裂原因，提出了维修建议。
The failure mechanism and service status quo of hot piercer point in seamless steel tube were analyzed and its failure was mainly caused by piercer point collapsing nose, sticking steel and cracking.
对穿无缝钢管热穿孔顶头的失效机制和使用状况进行了分析研究，认为穿孔顶头的失效形式主要表现为顶头塌鼻、粘钢、 开裂。
The frequent cracking in U-tube heat exchanger caused by corrosion at Lanzhou Petrochemical Corporation were analyzed in terms of materials, running conditions, overhaul operation etc.
对哈氏合金U形管换热器频繁出现的腐蚀断裂问题，从材质、运行工况等方面进行了分析，采取了更换材质等防腐技术措施，收到了很好效果。
Cl ion was also found in oil glue by chemical analysis method. It was concluded that the cl ion in the oil glue resulted in stress corrosion cracking of the pure copper tube.
结果表明，紫铜管渗漏系腐蚀引发裂纹所致，而涂在铜管表面的油胶中的氯离子是引起紫铜管应力腐蚀开裂的主要因素。
The too high pressure of the braking tube often results in the cracking of the braking hose, as a result of which the train is frequently emergency-braked.
制动管压力过高造成制动软管爆破而使列车紧急停车的事故时有发生。
The simulation results show that, the extension of priority valve cracking time, shortening tube length and increasing tube diameter will be helpful to reduce the hydraulic impact.
仿真结果表明，通过增大优先阀开启时间，适当缩短管路长度和增大管径能够有效降低液压系统的液压冲击现象。
In this article an analysis is made on cracking reasons of the straight tube and a palm welding and the relative prevention measure is put forward.
文章分析了直管对接焊缝开裂和掌形管开裂的原因，并提出了相应的防护措施。
And wet areas due to expansion caused by wood fiber tube warping and cracking phenomenon of wood.
以及潮湿地区因木材纤维管膨胀所引起木材弯翘和裂缝现象。
The failure mechanism and service sttaus quo of hot piercer point in seamless steel tube were analyzed and its failure was mainly caused by piercer point collapsing nose, sticking steel and cracking.
穿孔顶头是无缝钢管生产中最重要的模具之一，文章通过分析穿孔机顶头的失效形式，并从顶头外形、材质、表面氧化等方面探索提高顶头使用寿命的方法。
The failure mechanism and service sttaus quo of hot piercer point in seamless steel tube were analyzed and its failure was mainly caused by piercer point collapsing nose, sticking steel and cracking.
穿孔顶头是无缝钢管生产中最重要的模具之一，文章通过分析穿孔机顶头的失效形式，并从顶头外形、材质、表面氧化等方面探索提高顶头使用寿命的方法。
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