<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">

鐵粉類型對銅基粉末冶金摩擦材料性能的影響

Effect of iron-powder type on the friction and wear properties of Cu-based P/M friction materials

  • 摘要: 采用粉末冶金工藝分別制備含還原鐵粉、泡沫纖維鐵粉和鐵合金粉的銅基摩擦材料,研究了鐵粉種類對摩擦材料摩擦磨損性能的影響.當摩擦轉速從3000 r·min-1提升至6200 r·min-1,用還原鐵粉制備的樣品,其摩擦因數隨速度的升高出現嚴重衰退;含泡沫纖維鐵粉的樣品具有穩定的摩擦因數,試驗范圍內其波動值不超過0.024,但是磨損嚴重;采用鐵鎳合金粉制備的樣品可有效減緩高速階段摩擦因數的衰退,高速下摩擦因數波動低于0.027.以鐵鉻合金粉制備的樣品,其磨耗隨摩擦速度的增加幾乎不發生變化,抗磨損能力最佳.

     

    Abstract: Copper-based friction materials were made by powder metallurgy (P/M) from copper powder and ferrous powder, which is reduced Fe powder, spongy Fe powder, Fe-Ni alloy powder and Fe-Cr alloy powder, respectively. Their friction and wear properties were investigated by friction testing, scanning electron microscopy and microhardness measurement. When the rubbing speed increases from 3000 to 6200 r·min-1, the friction coefficient of specimens drops greatly. For specimens with spongy Fe powder, the friction coefficient changes less than 0.024, showing a stable friction coefficient but serious wear. When ferrous powder is strengthened by nickel, the friction coefficient stability of specimens at high rubbing speed improves obviously, and the friction coefficient changes less than 0.027. Specimens with Fe-Cr powder obtain the optimum wear resistance with almost constant wear rate as the rubbing speed increases.

     

/

返回文章
返回
<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">
259luxu-164