由粉末冶金Fe（Cr,Mo）钢制备同步器齿毂力学性能.pdf

学兔兔 第31卷第4期 粉末冶金技术 Ve1．31．No．4 2013年8月 Powder Metallurgy Technology Aug．2013 由粉末冶金Fe(Cr，Me)钢制备的 同步器齿毂的力学性能 Lorenz S Sigl，Patrice Delarbre (Sinterstahl GmbH，Ftissen D一87629，德国) 摘 要： 试验测定零件本身的强度性能是困难的，因此通常不采用此类数据。本文介绍了一种用于直接测 定零件本身强度性能的方法，即用水射流切割零件，随后进行磨加工制备小型矩形试棒(约40mm×5mm× 5mm)测定数据。采用典型粉末冶金零件——粉末冶金高合金化Fe(Cr，Me)钢同步器齿毂制备的小型试棒 测定抗拉强度、冲击强度及3点弯曲横向断裂强度，并和常规拉伸试样(DIN EN ISO 2740)的强度与冲击性能 进行了对比。结果表明，由同步器齿毂与常规试样测定的数据都在试验误差范围之内，完全一致。为了证实 对比的有效性，还用全面的化学与显微组织分析证明了2种试样的相似性。最后，建立了小型拉伸试棒的横 向断裂强度与抗拉强度之间的相关性。 关键词：力学性能；硬度；拉伸性能；横向断裂强度 Mechanical properties of components made from Fe(Cr，Me)P／M steels Lorenz S Sigl，Patrice Delarbre (Sinterstahl GmbH，Ftlssen D一87629，Germany) Abstract：Experimental access to the in—situ strength properties of components is difficult，which explains why such data are not generally available．The present paper reproduces a methodology which was recently introduced to directly access the strength properties of components．Such information is retrieved from small rectangular bars(size≈40mm ×5mm×5mm、which are prepared from a component by water—jet cutting and subsequent grinding．Using a synchronizer—hub as a typical P／M component，the tensile strength，the impact resistance and the transverse rupture strength in 3-point bending Were evaluated from these bars for a high-alloyed Fe(Cr，Mo)P／M steel，and compared to the strength and impact properties of conventional tens