Chinese Journal of Mechanical Engineering

Table 2 Experiment group arrangement

From: Tribological Properties of Cylinder Block/Valve Plate Interface of Axial Piston Pump on the Tribometer

Groups	Upper samples	Lower samples
Control group 1	CuPb15Sn5	38CrMoAl NHT
Control group 2	CuPb15Sn5	38CrMoAl NT
Experiment 1	CuPb15Sn5	38CrMoAl QTN
Control group 3	CuPb15Sn5	42CrMo NHT
Control group 4	CuPb15Sn5	42CrMo NT
Experiment 2	CuPb15Sn5	42CrMo QTN

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