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激光快速成形過(guò)程中殘余應(yīng)力分布的實(shí)驗(yàn)研究
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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(G2000067205-3)，國(guó)家高技術(shù)研究發(fā)展計(jì)劃(2001AA703020)資助項(xiàng)目


Experimental Study on Residual Stress Distribution of Laser Rapid Forming Process
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    摘要:

    以基材為1Cr18Ni9Ti不銹鋼，熔覆材料為Ni20自熔合金粉末，采用激光快速成形制取試件，并用小孔法對(duì)成形試件中殘余應(yīng)力的分布特性進(jìn)行了實(shí)驗(yàn)研究。結(jié)果表明，成形試件中的殘余應(yīng)力整體水平較低，屬于低殘余應(yīng)力。靠近基材處熔覆金屬承受1個(gè)與光束掃描方向平行的壓應(yīng)力，隨著熔覆層數(shù)的增加，壓應(yīng)力值逐漸減小并轉(zhuǎn)變?yōu)槔鞈?yīng)力，同時(shí)應(yīng)力值呈增加趨勢(shì)，與此相比，與光束掃描方向垂直的應(yīng)力值相對(duì)較小。

    Abstract:

    The test specimens which consist of Ni20 alloy powder as a cladding metal on the stainless steel 1Cr18Ni9Ti substrate was prepared by using laser rapid forming process and the residual stress distribution in the specimens was analyzed through the hole-drilling method. The results show that the residual stress level in the specimens is lower and belongs to low residual stress domain. The cladding metal near the substrate bore with a compressive stress parallel to the direction of laser scanning. With the increase of the number of cladding layer the value of the compressive stress minimizes gradually and transforms to tensile stress with the value increasing. Conversely, the residual stress perpendicular to the direction of laser scanning is smaller.

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楊健 陳靜 楊海歐 林鑫 黃衛(wèi)東.激光快速成形過(guò)程中殘余應(yīng)力分布的實(shí)驗(yàn)研究[J].稀有金屬材料與工程,2004,33(12):1304~1307.[Yang Jian, Chen Jing, Yang Haiou, Lin Xin, Huang Weidong. Experimental Study on Residual Stress Distribution of Laser Rapid Forming Process[J]. Rare Metal Materials and Engineering,2004,33(12):1304~1307.]
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  • 最后修改日期:2003-04-21
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