保护气

Nd∶YAG激光深熔焊接过程中同轴保护气流量对小孔的影响

Influence of coaxial shielding gas flux on keyhole in Nd : YAG CW laser deep-penetration welding

通过对利用同轴视觉传感系统所采集的Nd∶YAG激光深熔焊接过程中小孔图像的处理研究了同轴保护气流量对激光深熔焊接过程中小孔的影响。

The influence of coaxial shielding gas flux on keyhole was studied by processing the captured coaxial image of keyhole .

基于支持向量机的CO2焊接保护气流量识别研究

Research of CO_2 welding shield gas flux classifier based on SVM

气压对激光烧蚀Al靶诱导保护气电离的影响

Effect of Gas Pressure on Protecting Gas Ionizing Induced by Laser Ablating Aluminum

保护气和电流对焊缝中Cr和Ni的影响不明显。

Protection of gas and current welds of Cr and Ni obvious .

提高旋转频率和降低保护气中CO2含量能够增加焊缝表面弯曲和侧壁熔深。

Increasing rotating frequency and decreasing CO2 content in shielding gas can increase the bending of weld surfaces and the penetration of sidewalls .

比较不同保护气和添加Fe~（2+）时，与载Pt催化剂效果较一致。

Effect of different protection gas and Addition of Fe ~ ( 2 + ) was similar to that with Pt doping .

试验结果证明，只要控制燃烧气中CO2/CO之比在0.46～0.75之间，均能满足铁粉退火保护气的要求。

Experimental data show that the control of co2 / co ratio in the burned gas at 0.46-0.75 will satisfy the requirements of the protecting gas for annealing .

而合金元素C的过渡则随着焊丝自身氧化性的增加，由增碳型过渡发展到损失型过渡。保护气氧化性的增加更容易发生增碳型过渡。

For the element C , as the oxidizability of the wire increases the transfer changed from increase to lose and as the oxidizability of the arc increases the transfer increase occurs more easily .

以松香为原料、改性Pd/C为催化剂、200油为溶剂及N2为保护气，进行松香催化歧化反应集总动力学的研究。

The lumping kinetic model for catalytic disproportionation of rosin in 200 # solvent naphtha on modified Pd / C was investigated in nitrogen atmosphere .

将自制钽丝圈原子化器与原子吸收光谱仪联用，以氩气作保护气，测定了Cd、Cu、Mn、和Pb，研究这一原子化器的性能。

A self _ assembled tantalum coil atomiser for atomic absorption spectrometry is described . Pro_perties of the atomiser for the determination of Cd , Cu , Mn and Pb were studied using Ar as protecting gas .

当通入氩气作保护气时，到1173K才开始发生明显的化学反应。

The temperature of obviously oxidation will be delayed to 1173K when Argon is used as the protecting gas ;

利用线性预测（LPC）模型参数构造径向基函数（RBF）神经网络输入样本空间，对焊接保护气流量不足进行了在线模式识别。

The radical basis function ( RBF ) neural networks are applied for on-line pattern recognition of the gas-lack in welding , in which the input vectors of samples are constructed by the linear prediction coding ( LPC ) coefficients of sound signals .

进行了高强度铝合金的混合气体保护气焊接试验，对采用MIG焊接高强度铝合金厚板时产生的气孔形貌及其机理进行分析，研究了影响气孔产生倾向的因素。

In this paper , MIG welding experiment using mixed gas shielding is carried out , the characteristic shapes of porosity in weld metal are discussed , the formation mechanism of porosity is analyzed , and the factors which influence the tendency of porosity formation are studied .

研究了差热分析（DSC）法测定化工品、药品纯度的条件，测定的最佳条件为升温速率0.7℃/min，样品量2～3mg，保护气流速20～40mL/min。

The purity determination condition of chemicals and pharmaceuticals by DSC technique was introduced . The optimal testing conditions are : heating ramp being 0.7 ℃ / min , sample weight being 2 - 3 mg and gas flow rate being 20 - 40 mL / min.

在非真空和没有保护气的条件下球磨，得到的Mg2Ni贮氢合金具有良好的活化性能及较高的贮氢容量。

Mg_2Ni hydrogen storage alloy had good activation performance and high hydrogen storage capacity by ball milling with the environment of non-vacuum and no protecting gas .

在激光功率为3kW，侧吹保护气角度为35°条件下，通过优化焊接速度、侧吹保护气流量和离焦量等参量可以得到最佳焊缝质量。

The high-quality of weld seam with constant ( 3 kW ) laser power and 35 ° angle of side-blow shielding gas can be obtained by optimizing welding velocity , flow rate of shielding gas , defocusing distance and other parameters .

保护气流态分析及提高气体保护效果的措施

Fluid state analysis of shielding gas and measures for increasing its efficiency

氯气透平机保护气用干燥空气的制备

Preparation of dry air for protection of chlorine compressor

他不会为了保护气君主或国家而处于冲突中。

He doesn 't engage in the conflict to protect his lords or country .

用水煤气作铁粉退火保护气的试验研究

Experiment on water gas as a protecting gas in the annealing process of iron powder

克依构造带保护气藏的钻井液完井液试验研究

Experimental study on gas reservoir protection of drilling / completion fluid for KeYi structural zone

以氮气为保护气时，各形态氮的转化率都明显高于氩气条件下。

Conversion rate of nitrogen species was higher with protection gas N_2 than with argon gas .

保护气系统：从保护气体发生站至还原退火炉的管道。

Protective gas system : pipe line from the protective gas generation station to reducing annealing furnace .

保护气为5%O2+95%Ar焊缝的面弯和背弯都出现了裂纹。

Protection of gas to 5 % O2 + 95 % Ar weld surface bending and back bending crack .

首先对比了氩气、氦气和氮气作为保护气，焊接裂纹及氮气孔的形成规律。

The law of formation of the weld cracks and nitrogen porosity of argon , helium and nitrogen shielding GTAW was contrasted .

保护气中氮气、氧气含量分别为0.5%时，焊接接头的塑韧性变化不大。

When the nitrogen or oxygen content in the shield gas individually was 0.5 % , the plasticity of joints was not affect .

保护气为2%O2+98%Ar焊缝的晶间腐蚀和力学性能都符合JB4744-2000《钢制压力容器焊接试板的力学性能检验》标准。

The protective gas for the 2 % O2 + 98 % Ar welds to intergranular corrosion and mechanical properties of pressure vessel standards .

在灌装部件上可设有保护气入口，使灌装成为充保气及灌装工位。

The filling component can be provided with an inlet of shielding gas to be filled into a shielding gas filling and filling position .

研究表明，同轴保护气流量的变化对小孔上部的影响较大，而对小孔内部的影响很弱。

The results show that the coaxial shielding gas has great influence on the upside of keyhole and its influence on keyhole bottom is weak .