纯铝在耐热铝合金高温变形过程中的润滑作用

Lubrication action of pure aluminum during high temperature deformation of heat-resistant aluminum alloy

采用圆环压缩法检测Al-Fe-V-Si系合金在喷射沉积高温时变形的摩擦因数，研究未加润滑剂、加石墨＋机油润滑、加纯铝润滑、加纯铝＋石墨＋机油润滑4种条件下的摩擦因数随变形温度变化的情况，并探讨其润滑机理。研究结果表明，纯铝润滑以及纯铝＋石墨＋机油润滑均能有效地改善摩擦状况，其摩擦因数只有未加润滑剂时的1／3-1／4。采用纯铝润滑制备出外径×内径×长度为417mm×340mm×300mm的正挤压管材，采用纯铝＋石墨＋机油润滑反挤制备出外径×内径×长度为520mm×460mm×1000mm的管材。

Friction coefficients and lubricative mechanics of Al-Fe-V-Si heat resistant aluminum under four conditions were researched by method of annulus compression, without lubricant, but in the presence of pure aluminum, graphite＋oil, pure aluminum＋graphite＋oil. Results show that the condition of friction interface is improved when A1-Fe-V-Si alloy is lubricated by pure aluminum or by pure aluminum＋graphite＋oil, and the friction coefficients are 1/3 - 1/4 of those without lubriction. The extrusion pipes of with dimension of 417 min×340 min×300 mm and 520 min×460 min×1 000 mm in outer diameter by inner diameter by length are successfully prepared lubriction of pure aluminum and pure aluminum＋graphite＋oil respectively.