合金粉末的种类及成形压力对烧结低合金钢弹性模量与泊松比的影响

The effects of powder type and compacting pressure on the Young’s modulus and Poisson’s ratio of sintered low alloy steels

研究了在相同的烧结与热处理条件下,部分合金化粉末及预合金化粉末的不同合金成分与成形压力对低合金钢弹性模量及泊松比的影响。弹性模量及泊松比的值主要与孔隙度相关,孔隙度通过成形压力控制,而受合金粉末的种类的影响不大。弹性模量及泊松比与孔隙度的关系为E=E0(1-kE.P)2与v=0.034.(1-kv.P)2+0.267。式中E0是P=0时的E值,而kE与kv是实验系数,取决于粉末的种类与烧结温度。

In the same sintering and heat-treated conditions, the effects of partially alloyed and preaUoyed powders with the different contents of alloying elements and compacting pressure on the Yong＇s modulus （E） and Poisson＇s ratio （ v ） of sintered low alloy steels were investigated. The values of E and v depended mainly on the porosity （ P ） controlled by compacting pressure, and those values were affected slightly by the alloy powder types. The relations of P to E and v were described as the following equations： E=E0（1-kE·P）^2and v = 0.034（1 - kv·P）^ ＋ 0. 267, where E0 was the value of E at P = 0,and kE and kv were experimental constants that depends on the alloy powder types and sintering temperature.