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具有良好可焊性的钨强化低合金钢的研制 总被引:1,自引:0,他引:1
HCM2S是一种新近研制的低合金钢(0.06C-2.25Cr-1.6W-0.25V-0.05Nb),在600℃时它的强度大约是普通T22(2.25Cr-1Mo)的1.8倍。这种低碳钢的可焊性大的改善。它不需要焊前预热焊热处理。HCM2S于1993年4月被在容量锅炉上进行现场测定试验。 相似文献
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To measure projectile attitude in space flight,based on continuous wave( CW) radar,a new micro-Doppler effect testing technique is developed in this paper. It also establishes radar testing model for attitude of flying projectile and resolve micro-Doppler effect of projectile motion attitude.By distinguishing and geting attitude parameters such as micro-motion period,this technique can intuitively estimate the flight stability of projectile,and the validity of this technique is proved according to flight tests. 相似文献