抄録
The driving performance tests of sintered iron-(5-40) %lead-3%copper and iron-(10-30)% lead porous bearings produced by a low-temperature sintering at 900°C were carried out. The results were compared with conventional iron, iron-copper and bronze porous bearings.
The results obtained were as follows:
1) The coefficient of friction of the iron-lead-copper bearing having lead contents of over 10% did not rise even at a fairly high pressure, but only showed an abnormal wear at a critical pressure. The critical pressure of iron-20% lead-3% copper bearing was highest.
2) The critical pressures for the abnormal wear of iron-lead bearings were lower than those of the iron-lead-copper bearings. Therefore, the addition of copper is also necessary for increasing the driving performance as well as increasing the strength of the iron-lead-copper bearing.
3) On comparison of the driving performance among the conventional iron, iron-copper and bronze bearing, the level of coefficient of friction of iron-l0%-lead-3% copper bearing was lowest at medium pressures. So that, it is useful for the medium duty of about 1000-1500 kgf/cm2.m/min. The maximum permissible PV value of iron-20% lead-3%o copper bearing was highest, about 3000 kgf/cm2⋅m/min. Therefore, it can be also used at the heavy duty.
