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就C02气体保护焊方法焊接灰口铸铁的可能性进行了工艺分析.通过试验确定了C02气体保护冷焊铸铁的焊接工艺参数及工艺措施,并将此工艺应用于电机壳、阀体等工件的焊接,取得了满意的效果. 相似文献
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The persistent photoconductivity (PPC) of amorphous Hg0.78Cd0.22Te: In films has been studied under illumination by super-bandgap light (a He-Ne laser, hν=1.96 eV, 30 mW/cm2) and sub-bandgap light (1000 K Blackbody source, the largest photon energies hνp=0.42 eV, 8.9 mW/cm2) in the range of 80-300 K. The persistent photoconductivity effect increases with increase in illumination intensity and illumination time. However, it decreases with increase in working temperature. The non-exponential decay of photoconductivity implies the presence of continuous distribution of defect states in amorphous Hg0.78Cd0.22Te: In films. These results indicate that the decay of photoconductivity is not governed by the carrier trapped in the intrinsic defects, but it may be due to light-induced defects under light illumination. 相似文献
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在对35CrMo大齿轮的焊接性进行分析和对SQJ502药芯焊丝的机械性能及工艺性能进行测试的基础上,采取了可行的工艺措施进行大齿轮的焊接,焊接质量达到了技术要求。 相似文献