未焊透

另外镁合金焊接过程中还会出现未焊透、夹渣、接头软化等缺陷。

In addition magnesium alloy welding process is also prone to some defects such as lack of penetration , slag , joint softening .

未焊透缺陷是在役压力管道缺陷中存在的主要缺陷，研究其安全评定工程方法不仅具有重要的理论意义更具有重要的工程应用价值。

Lack of penetration ( LOP ) is one of the main defects in piping . It is necessary to study the safety assessment engineering method of LOP not only in academic research but also in practice engineering .

X射线对薄板未焊透的低检出率及解决途径

Approach to increase detectability for lack of penetration in sheet weld X-ray radiography

未焊透J积分计算的工程简化方法

Investigation of an Engineering Simplification Approach for LOP 's J integral Calculation

未焊透与裂纹间J积分或J&R曲线关系的有限元分析

The Finite Method Analysis of the Relationship of J-integral or J-R Curves between Lack of Penetrations and Cracks

按照得到的极大似然方法，进行了含未焊透缺陷接头的疲劳试验，得到了相应的PSN曲线。

According to the maximum likelihood method inferred , the fatigue test of the incomplete penetration welded joints was conducted , and the P S N curves were obtained .

通过计算和分析可知，在管节点焊缝的未焊透处，应力集中系数最大，且当未焊透深度Df≥1~1.5mm可作为超标缺陷当量尺寸进行评判。

Calculation and analysis showed that there was maximal stress concentration coefficient at incomplete penetration of welded tubular joint . When the depth of incomplete penetration D_f ≥ 1 ~ 1.5 mm , it was judged as equivalent size of overproof defect .

当未焊透缺陷深度不超过1.5mm（60%壁厚）时，结构是安全的，安全系数为1.9至4。

When the depth of LOP is less than 1.5mm ( 60 % shell thickness ), the structure is safe . The safety factor is 1.9 to 4 .

钢桁架焊缝未焊透的超声波检测

Ultrasonic Testing of the Welds in Steel Truss for Incomplete Penetration

利用超声变型纵波检测焊缝中间未焊透

Ultrasonic detection of incomplete penetration in welds by modified longitudinal waves

T形焊缝未焊透宽度的测定

The Measurement of the Width of Spilly Place in T-Shape Weld

未焊透焊缝疲劳强度分析及工程应用

A study of the fatigue strength of incomplete penetration butt weld

未焊透对铝焊缝使用性能的影响

Influencing on Using Performance of Aluminum Weld Seam with Lack of Penetration

未焊透的弹塑性断裂失效分析研究

The Investigations of Elastic-plastic Fracture and Failure Analysis of Lack of Penetrations

T型接头组合焊缝未焊透深度的超声检测方法

Ultrasonic detecting method of incomplete penetration depth of T-joint weld

一条含未焊透缺陷压力管道的强度分析与安全评定

Strength Analysis and Safety Assessment for A Pressure Piping with Incomplete Welding Flaw

锅炉未焊透椭圆接管结构应力数值分析

Stress analysis on ellipse tube welded to boiler connection with incomplete penetration defects

未焊透焊接接头疲劳性能研究的极大似然方法

Maximum likelihood method for studying on fatigue behavior of incomplete penetration welded joint

未焊透对网架空心球节点应力集中的影响

Effects of incomplete penetration on the stress concentration of lattice frame empty spheric joint

压力管道未焊透超标缺陷的安全评定

Safety Assessment for Incomplete Penetration Defect of Welding Failed to Criteria in Pressure Piping

未焊透的对接焊缝在射线图像里显示为焊缝中间出现黑色的直线；

The lack of penetration will have black beeline in the middle of weld joints .

焊接过程电弧稳定，焊接接头熔合良好，未见裂纹、未焊透、夹渣、气孔等缺陷。

This process showed a stable arc , good welding joints without any gas pores and cracks .

管道对接焊缝未焊透自身高度黑度补偿测定方法研究

Study on measuring the height of lack of penetration in butt weld of piping by density compensation

结果表明，焊缝存在的未焊透缺陷不影响管道的安全运行。

The results showed the existence of the flaw would not effected the safe operation of the piping .

因而，正确评价未焊透缺陷的危害性对于确保工业压力管道的安全运行具有十分重要的意义。

Therefore , reasonable evaluation of incomplete welding defects is significant to ensure the safety of pressure pipes .

净截面失效准则在压力管道未焊透缺陷评定中的应用

Application of Net Sectional Area Collapse of Criterion to Flaw Assessment of Piping with Non - penetration Welding

整圈未焊透三通塑性极限内压的研究

Study on the Plastic Limit Internal Pressure for Welded Piping Tee with Poor Penetration Along Line of Intersection

对管道焊缝根部内凹与根部未焊透的分析

Humble Opinion about the Sinking Towards inside and welding Not Thoroughly in the Root of a Piping Weld Seam

计算了空心球与钢管连接处在含有未焊透缺陷时的应力集中系数；

Stress concentration coefficient under incompletely filled groove defect around the joint of empty sphere and steel tube is calculated ;

T型接头焊缝中未焊透宽度对钢结构质量的影响

The width of lack of penetration in T type joint welding has a influence on the quality of steel structure