高摩擦力矩值钢纤维增强粉末冶金摩擦材料

Application research of steel fiber in powder metallurgy friction materials

成功地制备了一种在0.25～0.30 MPa低制动压力和0～2 000 r/min转速下产生高力矩的铜基粉末冶金摩擦材料,通过加入6%～9%(质量分数)的低碳钢纤维有效地提高了该材料摩擦面上的微凸体数量,使偶面始终保持高咬合性,从而极大地提高了室温和热态条件下的摩擦稳定性,且在上述工况范围内工作时偶面上产生的力矩始终保持在24 N.m以上。在热态并接近零转速状态下,于旋转方向垂直悬挂20 kg重物,工作偶面不产生相对位移,可完全满足用户对摩擦材料的特殊要求。

A kind of steel fibre strengthening powder metallurgy friction material with high brake moment under 0.25-0.30 MPa low brake pressure and 0-2 000 r/min rate was prepared successively. After adding 6%-9% （mass fraction） of steel fiber, the micro protruded objects on the friction face are increased effectively which makes a high bite effect on the matching face and improves its friction properties under both atmospheric temperature and high temperature Ranging over the whole working conditions mentioned above the material can produce over 24 N·m brake moments on the friction face. And under the condition of high temperature and near zero rotating speed, a 20 kg heavy object hanging along the rotation direction of the experimental friction couple, there is no movement between the couple faces. Those above show that the new friction material is satisfactory to the special application requirement.