Friction Stir Forming of A5083 Aluminum Alloy Gear-Racks with WC Particles Embedded in Tooth Surface
Friction Stir Forming of A5083 Aluminum Alloy Gear-Racks with WC Particles Embedded in Tooth Surface
复制标题
齿面嵌入WC颗粒的A5083铝合金齿轮齿条搅拌摩擦成形
DOI：
10.4028/www.scientific.net/kem.723.148
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
T. Nishihara
中科院分区：
文献类型：
--
作者：
T. Ohashi;H. Tabatabaei;T. Ikeya;T. Nishihara
提出了一种齿面强化层齿条成形新工艺。建议的过程如下。首先，将其上已施加WC颗粒和凡士林膏的表面改性剂的JIS A5083P铝合金板置于齿轮齿条模具上。接着，在板的背面上进行摩擦搅拌。然后材料变形并精确地填充模具的腔体。由于摩擦搅拌产生的高压和高温，WC颗粒嵌入铝合金基体表面。研究了齿面碳化钨强化的成形条件和结果，包括齿面碳化钨强化的分布。WC颗粒以机械方式镶嵌在基体表面附近，基体内部只有极少量的WC颗粒。在未填充条件下，WC颗粒集中在齿的后表面上，该齿接触模具的尾部侧。与此相反，没有观察到显着的颗粒密度之间的差异与模具型腔中的完全填充条件的齿的轮廓。
This paper proposes a new forming process for gear racks featuring a tooth-surface stiffening layer. The proposed process is as follows. First, a JIS A5083P aluminum alloy plate on which a surface modifier of WC particles and vaseline paste had been applied was put on a gear-rack die. Next, friction stirring was conducted on the back surface of the plate. The material then deformed and precisely filled the cavity of the die. WC particles were embedded into the surface of the aluminum alloy matrix due to high pressure and heat caused by friction stirring. The forming conditions and the corresponding results, including the distribution of WC perticles on the tooth surface, are investigated in the study. WC particles were embedded near the surface mechanically, and only a very few particles were observed inside the matrix. With an undefill condition, WC particles are concentrated on the rear surface of the tooth, which contacts the tail side of the die. In contrast, No significant particle density differences were observed among the profile of teeth with a fully filled condition in the die cavity.