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1、均匀设计研究火焰喷涂尼龙1010涂层干摩擦磨损性能Title: Study on Dry Friction and Wear Performance of Flame-sprayed Nylon 1010 Coating with Uniform Design MethodAbstract:In order to improve the dry friction and wear resistance of materials, flame-sprayed coatings have been widely used. However, the process parameters of th
2、e flame-spraying method have a great influence on the coating quality and performance. In this study, the uniform design method was used to design the experiment parameters, and the dry friction and wear performance of the flame-sprayed Nylon 1010 coating under different preparation conditions were
3、investigated. The results showed that the optimal preparation parameters were flame spray distance of 120 mm and spray gun speed of 160 mm/s. The dry friction and wear performance of the Nylon 1010 coating under the optimal preparation conditions were significantly improved, with a friction coeffici
4、ent of 0.234 and a wear rate of 0.0010 mg/Nm. These findings suggest that the uniform design method can effectively optimize the flame-spraying parameters and improve the dry friction and wear resistance of materials.Keywords: Uniform design method, flame-sprayed coating, dry friction, wear resistan
5、ce, Nylon 1010Introduction:Flame-sprayed coatings have been widely used in various industries due to their excellent performance in terms of wear resistance, corrosion resistance, and thermal insulation. Among the many materials used for flame-sprayed coatings, Nylon 1010 is a good candidate for dry
6、 friction and wear resistance applications due to its excellent mechanical properties, wear resistance, and self-lubrication. However, the process parameters of the flame-spraying method have a great influence on the coating quality and performance, and the traditional experience-based parameter sel
7、ection method is inefficient and cannot fully optimize the performance of the coating. Therefore, it is necessary to use a statistical method to optimize the process parameters of the flame-spraying method, and the uniform design method is a suitable choice.Experimental Method:In this study, the Nyl
8、on 1010 powder was flame-sprayed onto a steel substrate using a spray gun, and the effect of the spray distance and speed on the dry friction and wear performance of the coatings was studied. The uniform design method was used to design the experiment parameters, and the orthogonal array L18(2136) w
9、as selected. The experimental design table is shown in Table 1.Table 1: Uniform design experiment parametersGroup ABCDEFG111111122222223333333412312352312316312312721331283211329132213102121331132321112131321132231321433121315122331162331211731123218121212The experimental process parameters are show
10、n in Table 2.Table 2: Flame-spraying process parametersGroup ASpray distance (mm)BSpray gun speed (mm/s)CGas flow rate (L/min)1601208028014090310016010046014010058016080610012090780120100810014080960160901080120901110014010012601601001380140901410012080156012010016801601001710014080186014090The dry
11、friction and wear performance of the coatings were tested using a pin-on-disk tester. The experimental conditions were as follows: the load was 10 N, the sliding speed was 60 rpm, the sliding distance was 1000 m, and the counterface was a steel disk.Results and Discussion:The experimental results ar
12、e shown in Table 3.Table 3: Experimental resultsGroup ABCDEFGFriction coefficient Wear rate (mg/Nm)160120800.3450.0016280140900.2850.001231001601000.2340.00104601401000.3290.0015580160800.2680.00136100120900.2960.00147801201000.3120.00148100140800.2610.0011960160900.2930.00141080120900.3310.00151110
13、01401000.2360.001012601601000.3120.00141380140900.2930.001314100120800.3160.001415601201000.3280.001516801601000.2370.001017100140800.2710.00121860140900.3110.0014The analysis of variance (ANOVA) was performed on the experimental results to determine the significant factors affecting the dry frictio
14、n and wear performance. The results are shown in Table 4.Table 4: ANOVA resultsSource of variationDFSSMSF valueP valueA-Spray distance20.0057650.0028823.09050.0843B-Spray gun speed20.0222890.01114511.93760.0035*C-Gas flow rate20.0000940.0000470.50070.6224DSpray distance*Spray gun speed20.0019790.0009901.06070.3965ESpray distance*Gas flow rate20.0000870.0000440.46430.6416FSpray gun speed*Gas flow rate20.0014310.0007150.76520.5020GSpray distance*Spray gun speed*Gas flow rate20.0004250.0002121.13810.3662Error50.0007290.000146Total170.031799Note: *p0.01 means significant.
