Gas pressure significantly affected particle velocity and gas temperature gave small influence in particle velocity. He gas gave higher velocity than N_2. The critical velocity of stainless steel powder was about 650 - 670 m/s which higher than the theoretically calculated result of 630 m/s in M. Grujicic's study [1].
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机译：气体压力显着影响粒子速度和气体温度对颗粒速度的影响很小。他的气体比N_2更高的速度。不锈钢粉末的临界速度约为650-670 m / s，高于M. Gruchicic的研究中630 m / s的理论计算结果[1]。
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