本文選題：釩鈦鐵精礦 + 原位合成　； 參考：《熱加工工藝》2017年22期

【摘要】：以釩鈦鐵精礦和石墨為原料,在真空條件下采用原位碳熱反應(yīng)加燒結(jié)工藝制備了鐵基摩擦材料,研究了鐵含量(66wt%~82wt%)對鐵基摩擦材料微觀組織、相對密度、硬度、摩擦系數(shù)、磨損率、導(dǎo)熱系數(shù)和壓縮強度等性能的影響。結(jié)果表明:利用釩鈦鐵精礦可制備出性能良好的鐵基摩擦材料。隨鐵含量增加,材料孔隙率逐漸減小,材料微觀組織里出現(xiàn)層片狀珠光體的趨勢先增強后減弱。材料相對密度、布氏硬度、導(dǎo)熱系數(shù)和壓縮強度均隨鐵含量的增加而增大,但對磨損率而言,當(dāng)鐵含量從66wt%增加到78wt%時,磨損率從2.27×10~(-7)cm~3/J逐漸增大到3.82×10~(-7 )cm~3/J。當(dāng)鐵含量再增大到82wt%時,磨損率反而快速降低至1.06×10~(-7)cm~3/J。綜合來看,當(dāng)鐵含量在70wt%~74wt%內(nèi)時制備的鐵基摩擦材料有較適中的摩擦系數(shù)、磨損率和導(dǎo)熱系數(shù)。
[Abstract]:Iron based friction materials were prepared by in-situ carbothermal reaction and sintering under vacuum conditions using vanadium iron concentrate and graphite as raw materials. The microstructure, relative density, hardness and friction coefficient of iron based friction materials were studied. The effects of wear rate, thermal conductivity and compression strength. The results show that Fe based friction materials with good properties can be prepared by using vanadium titanic iron concentrate. With the increase of iron content, the porosity of the material decreases gradually, and the lamellar pearlite in the microstructure of the material increases first and then weakens. The relative density, Brinell hardness, thermal conductivity and compressive strength of the materials increase with the increase of iron content. However, for the wear rate, the wear rate increases from 2.27 脳 10~(-7)cm~3/J to 3.82 脳 10 ~ (-7) cm ~ (-1) 路m ~ (-1) when the iron content increases from 66wt% to 78wt%. When the iron content increased to 82 wt%, the wear rate decreased rapidly to 1.06 脳 10 ~ (-1) ~ (-7) cm ~ (-1) 路m ~ (-1) 路m ~ (-1). Generally speaking, when the iron content is within 70 wt% and 74 wt%, the iron-based friction materials have moderate friction coefficient, wear rate and thermal conductivity.
【作者單位】： 四川工程職業(yè)技術(shù)學(xué)院材料工程系;四川大學(xué)制造科學(xué)與工程學(xué)院;
【基金】：四川省科技支撐計劃項目(2012GZX0089) 德陽市科技支撐計劃項目(2013ZZ073-08)
【分類號】：TB39

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