保护气体

文本在600&1000℃温度范围内的五个不同温度下，对浮法玻璃生产中七种保护气体组成A、B、C、D、E、F、G进行了热力学理论计算。

The paper is a presentation of the thermodynamic theoretical calculation for the seven protective gas compositions ( A.B.C.D.E.F.G ) in the floatation process of glass in five different temperatures ranging from 600 to 1000 ℃ .

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。

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 .

CO2激光-MAG电弧复合焊接保护气体的影响规律

Effects of shielding gas in CO_2 laser-MAG hybrid welding

本文介绍双元活性气体CO2+O2作为保护气体在熔化极电弧焊中的应用。

Application of CO_2 + O_2 mixture shield gas used in MIG welding is introduced .

本文从实验角度对一种新型保护气体C2H2F4在镁及镁合金熔炼中的保护效果、保护机理进行了研究。

This paper studies protective results and protective mechanisms of a new kind of protective gas C_2H_2F_4 experimentally .

论文分析了保护气体在镁合金熔炉内的流动过程，建立了镁合金熔炉内保护气体湍流流动的数学模型，应用FLUENT流体计算软件进行了数值模拟。

With the aid of the software & FLUENT , the mathematical model of turbulent flow in the magnesium alloy melting furnace is established .

通过调节保护气体中CO2的含量，研究了保护气体氧化性对高强钢焊缝金属低温韧性的影响规律，同时分析了这种影响规律的作用过程。

In the article , the effect of shielding gas oxidizability on low-temperature flexibility of weld metal of high strength steel were investigated by changing carbon dioxide content .

在正常的近空间升华过程中，CdTe的蒸汽压远小于保护气体的气压。

In the course of the normal close-spaced sublimation , CdTe vapor pressure is far smaller than the protecting atmosphere .

另外，用H2作为保护气体，对引线弯曲性能较差的镀覆亮镍的金属封装进行退火，也能明显改善外引线的抗弯曲疲劳能力。

In addition , the bending fatigue of leads to metallic packages plated with bright nickel can be controlled by annealing in hydrogen .

采用CO2作为保护气体消除大熔深激光焊接低碳钢时易发生的气孔问题，并对比研究了CO2和Ar气保护条件下12mm厚低碳钢板激光焊缝的组织和韧性。

CO 2 gas was used as the shielding gas to eliminate porosities in deep penetration laser welding of low carbon steel in this paper .

第三部分研究了在氦气作保护气体的情况下，用变极性TIG焊方法焊铝时，焊接电流、电弧电压的变化情况和电弧形态的变化。

The third is , when Al is welded by means of VPTIG method of helium , the changes in current , voltage and arc shape .

用Ar气作保护气体，气压保持在一个标准大气压，用Nd：YAG脉冲激光烧蚀Al靶获得等离子体。

Ar was used as protecting gas , with ambient pressure being kept at 1 × 10 5 Pa. A plasma was obtained by Nd : YAG pulsed laser beam ablating an aluminium target .

依据近似熵的理论和算法，从非线性角度对纯CO2保护气体条件下短路过渡电弧焊的电流信号进行了近似熵分析。

Based on the approximate entropy theory and related algorithm , approximate entropy analysis of current in short-circuiting arc welding in CO_2 shielding gas are performed from the point of view of nonlinear time sequences .

对比结果表明，加入氮气作为保护气体提高了TIG焊接电弧的电弧温度、等离子体速度和电弧压力，能得到更高能量密度的焊接电弧。

The results show that the temperature , pressure and velocity of the arc could rise adding N_2 as protesting gas and higher energy density arc can be got .

保护气体为20%CO2+80%Ar的焊缝成形比纯Ar的好。两种保护气体下的焊接和热影响区组织都为珠光体+铁素体，没有出现淬硬组织。

The shielding gas of 20 % CO2 + 80 % Ar weld shape than that of pure Ar. Two protective gas welding heat affected zone of pearlite + ferrite , no hardened organizations .

从其焊接设备的要求、保护气体以及其熔滴过渡控制、焊接过程等几个方面，详细介绍双丝MAG焊的工艺及其特点。

This article illuminates the process and characteristic of double-wire MAG welding from requirements of welding machine , gas , metal transfer control and weld-ing process .

保护气体组成及其保护方式是决定CO2激光-钨极氩弧焊（TIG）电弧复合焊接工艺稳定性和激光、电弧两种热源能否有效耦合并取得增强的焊接熔深的关键原因。

Shielding gas is the crucial reason for the process stability and the efficient synergetic effects between laser welding and CO_2 laser-TIG ( tungsten inert gas ) hybrid welding , resulting in bigger weld penetration depth .

激光深熔焊中侧吹保护气体方法用于降低等离子体中的电子密度抑制等离子体，TIG中活性焊剂也有吸收电子的作用。

The method of blow , side protecting gas in laser deep welding is used to reduce the electronic density of plasma , also , the active flux in TIG can absorb electron .

介绍了高速MAG焊所要求的保护气体，采用这种保护气体可使电弧稳定，提高焊接质量并降低成本。

This paper describes the shield gas required by MAG High Performance welding . Using this shield gas can stablize arc , improve welding quality and cut production cost .

保护气体流量增加，过渡平均周期下降，而且复合焊接的平均周期比MIG焊接下降的快。

With the increase of shielding gas flow , the average period of droplet transfer decreases , and the average period in hybrid welding process declines faster than MIG welding process .

保护气体对含铌不锈钢药芯焊丝347L脱渣性的影响

Effects of different shielding gases on slag detachability of type 347L flux-cored wire for stainless steels containing Nb

结果表明：含0.1%体积浓度的HFC-32保护气体可以较好地起到保护作用；

The results show that the protective atmosphere of air containing 0.1 % HFC-32 has a fairly good protective effect .

本文以大量的试验结果表明了电流频率、钨极尺寸和保护气体成分等对小电流TIG焊电弧稳定性的影响规律。

In this paper the law in the effects of current frequency , size of tungsten pole and composition of shielding gas on the arc stability in low-current TIG welding is revealed by a large number of experimental results .

以不锈钢SUS304作为试验对象，分别研究了焊接速度、散焦离焦量、激光功率和保护气体等工艺参数以及活性剂和活性元素硫对不锈钢YAG激光焊焊缝成形的影响。

The effects of welding speed , defocusing distance , laser power , shielding gas , activating flux and activating elements on weld shape in YAG laser welding of SUS304 stainless steel was studied .

为消除LY12CZ铝合金激光焊接时焊缝中常见的气孔和裂纹缺陷，通过正交实验，优化了激光功率、扫描速度、保护气体流量等工艺参数，并采取适当的焊前预处理工艺。

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 .

不使用填充焊丝，当焊接电流为45A、钨针直径为1.6mm、保护气体流量为15L/min时，AZ31镁合金薄板氩弧焊接头的力学性能可达到母材的79%左右。

Without welding wire , the joint strength is about 79 percent of the base material at 45A welding current . The joints strength is increased with welding wire .

本论文利用化学气相沉积法（APCVD），以TiCl4和NH3气体作为反应物，以惰性气体N2作为保护气体和载气，在玻璃基板上沉积TiN薄膜。

TiN films were deposited on glass substrates by atmospheric pressure chemical vapor deposition ( APCVD ) using titanium tetrachloride ( TiCl_4 ) and ammonia ( NH_3 ) as reactants , nitrogen ( N_2 ) as protective atmosphere and carrier gas in this paper .

用破裂盘，有时后候后面还有一个熔化温度为212F（100C）易熔金属，来保护气体钢瓶，防止由于起火而破裂。

Gas cylinders are protected from rupture due to fire by a frangible disc sometimes backed by a fusible metal with a melting temperature of about212F ( 100C ) .

铸造镁合金熔炉内保护气体流动数值模拟

Numerical Simulation of Protective Gas in the Furnace of Magnesium Melt

保护气体对焊缝金属氢脆敏感性影响的研究

Effects of Shielding Gas on Hydrogen Embrittlement Sensibility of Deposit Metal