The origination of some defects encountered in aluminum wheel for the Peugeot car, such as crack, porosity, gas hole, was analyzed. 对某铝轮有限公司生产的标致汽车铝轮所产生的裂纹、疏松、气孔等的原因作了分析。
The effect of gas hole location on SMT solder joint fatigue life has been analyzed by finite element method. 分析发现,与无缺陷焊点相比,气孔使焊点中应力应变分布发生了改变,使焊点疲劳寿命缩短;
The way to prevent the occurance from penetrating gas hole was analyzed. 并对防止侵入性气孔产生的途径进行了分析。
By using this process to repair castings, there is no obvious separating line, no slag inclusion and gas hole between the welding zone and base metal. 用此工艺焊补铸件,焊补区域与基体间没有明显的熔合线,无渣孔、气孔等缺陷。
The gas hole, shrinkage cavity and crack were eliminated through up-grading technology. 并且改进工艺,以消除气孔、收缩和裂纹。
Based on analogic theory, hydraulic model was founded to choose the optimum gating system for prevention from casting defects including gas hole and misrun. 水力模拟依据相似理论,建立水力模型,选出最佳浇注系统,防止吸气、浇不足等缺陷;
It is significant to improve the hydraulic system for better performance of drilling rig and the higher ratio of finishing gas hole. 提高全液压坑道钻机液压系统的技术水平,对于改善钻机整机性能及提高瓦斯抽采孔的成孔率具有重要意义。
This paper analyses theoretically and technologically, the reason of barrel tooth holders sealing off, of produced gas hole and cold crack. Especially, the writer has fourd the way to avoid them. 从理论和工艺上分析滚筒齿座开焊的原因、气孔的产生和怎样减少气孔生成、冷裂现象生成及其予防。
So often easily design overflow and air vent at inappropriate location, making casting generated gas hole. 所以常常容易因为溢流井与逃气道位置设计不当,使得铸件产生气孔的缺陷。
Ingot quality influences the property of alloys significantly. The common defects in cast ingots are shrinkage cavity, gas hole, crack, segregation, cold lap and copper sweat during the Cu-Cr-Zr vacuum melting and casting. 铸锭的铸造质量对合金的使用性能有重大影响,Cu-Cr-Zr合金常见的铸造缺陷包括缩孔、气孔、裂纹、偏析、冷隔和铜豆等。
Reasons for Producing Gas Hole and Prevention Measurement under Centrifugal Casting for Al-Si Alloy Al-Si合金离心铸造产生气孔的原因及防止措施
Protection of Gas Hole in welding seam in Summer 夏季焊接时焊缝产生气孔的原因及防止
There are many differences in grain size, gas hole ratio, density, production cost, technology and electric properties by different making methods. 二种方法制备的材料在粒度、气孔率、密度、成本、工艺性和电性能诸方面都存在明显的差异。
Influence of Deoxidize Content in Covering on Gas Hole of Surface Welding 药皮中脱氧剂含量对堆焊焊条焊接气孔的影响
Gas Hole Characteristics and Forming Mechanism of Oxygen Free Copper Rod with Up Casting 上引铸造无氧铜杆的气孔特征及其形成机理
With the application of QC method, combined with the mathematical statistical analysis, The main factors that affect the gas hole are found. 运用QC(质量管理)方法,并结合统计分析,查找出了影响气孔的主要因素。
Study on Avoiding Gas Hole on Surface of Electrical Cobalt 消除电钴表面气孔的工艺研究
The most frequently encountered defects in the process of wet underwater welding are the gas hole of welding seam, poor formation of welding, high sensitivity of hydrogen induced cracking on welding seam and heat affected zone. 湿法水下焊接最常见的缺陷是:焊缝气孔、焊缝成形差、焊缝及热影响区氢致裂纹敏感性大。
The calculation results show that proper increase of the gas hole diameter of the control cavity and the diameter of the piston end face near the control cavity are favourable to improve the response characteristics of the valve under the premise of essential service life. 计算结果表明:在保证必要的工作寿命的前提下,适当地增大控制腔气孔的直径或增大靠近控制腔的活塞端面直径有利于提高该网的响应能力。
Selecting suitable spray distance, Sprayed work piece turning velocity and plasma flame temperature, thus can get optimum coating cooling rate, it is the key to enhance coating hardness and decrease gas hole ratio. 选择恰当的喷涂距离、喷涂工件转速、控制适当的等离子焰温度,得到最佳涂层冷却速度,是提高涂层硬度和减少气孔率的关键;
In-situ Observation and Analysis on the Formation of the Precipitating Gas Hole during Casting 铸件内析出性气孔形成及演化的直接观察与分析
The results show that the position of the exhausting gas hole and the arc heat effects on the gas inside the hollow moving contact have obviously raised the pressure rising speed. 利用它对国产OFPI&220型SF6断路器进行的计算结果表明,改变动触头排气孔位置及电弧对动触头内腔中气体的热效应可明显提高开断电流时灭弧室压力上升速度。
Gas hole and inclusion can be reduced by properly increasing thickness, and quality of the chilling layer, uniformly spraying and cleaning the mould cavity on time. 适度增加激冷层厚度,提高激冷层品质,均匀喷涂并及时清理模具型腔,可减少气孔和夹杂物缺陷。
Technology Control on Gas Hole or Shrinkage Cavity of Die Castings 压铸件内部气(缩)孔的工艺控制
Formation characteristics, aperture configuration and dynamic change of gas hole in the early stages of foamed aluminum were investigated based on preparation of foamed aluminum by a new powder metallurgy method with immersing preformer and heating up rapidly. 通过采用粉体致密化浸入式快速加热新工艺制备泡沫铝技术,研究了泡沫铝发泡早期气泡形成特征、早期气泡孔径结构特点及动态变化规律。
Morphology and Formation Mechanism of Loudspeaker Shaped Gas Hole in Tin Bronze Sleeves by Centrifugal Casting 锡青铜离心轴套铸件喇叭形气孔形貌及其形成机理
The experimental result indicates that deep penetration laser welding can effectively avoid softening HAZ, control the gas hole and restrain joint flaw of welding of zinc coated high strength steel by blowing coaxial and side protective gas. 研究结果表明:在同轴和侧吹保护气体的条件下,激光深熔焊接能有效地避免高强度镀锌钢热影响区(HAZ)的软化,控制焊缝气孔及焊接接头裂纹的产生。
Increase in inserted depth of crystallizer could eliminate gas hole and porosity. 将结晶器插入深度增加,可使气孔、缩松问题得到解决。
Firstly, wax pattern tooth face was sprayed with a layer of slurry, and then stained with slurry, which can improve the clarity tooth face profile and avoid gas hole. 铸造齿形精铸件时,可在蜡模齿面先喷涂1层浆衬,然后再沾浆操作,可以提高齿面轮廓清晰度,并避免产生大、小气泡。
Gas defects of TiAl alloy are invasive gas hole, reactive gas pore and precipitated gas pore. 离心铸造中,钛铝合金的气孔缺陷包括卷入的侵入性气孔、析出性气孔及反应性气孔。