CAJ | 학술논문

运用均匀化设计方法研究超声速等离子工艺参数对涂层的孔隙率和显微硬度的影响。利用逐步回归的数学方法回归分析喷涂电压、喷涂电流、氩气流量和喷涂距离对孔隙率、显微硬度的综合作用。回归分析表明，三次多元多项式和二次多元多项式分别适合于表征上述工艺参数对涂层孔隙率和显微硬度的影响规律。对孔隙率回归方程和显微硬度回归方程进行数学处理并分析表明，超声速等离子喷涂NiCr-Cr3C2的最佳工艺参数对应的喷涂电压、喷涂电流、氩气流量和喷涂距离分别185 V，375 A，110 L/min和107 mm，该参数下的涂层孔隙率为1.07%，显微硬度值为1097 HV0.3。经验证，孔隙率及显微硬度回归方程分别适合于表征喷涂电压、喷涂电流、氩气流量和喷涂距离等工艺参数与NiCr-Cr3C2涂层孔隙率及显微硬度的关系。
운용균균화설계방법연구초성속등리자공예삼수대도층적공극솔화현미경도적영향。이용축보회귀적수학방법회귀분석분도전압、분도전류、아기류량화분도거리대공극솔、현미경도적종합작용。회귀분석표명，삼차다원다항식화이차다원다항식분별괄합우표정상술공예삼수대도층공극솔화현미경도적영향규률。대공극솔회귀방정화현미경도회귀방정진행수학처리병분석표명，초성속등리자분도NiCr-Cr3C2적최가공예삼수대응적분도전압、분도전류、아기류량화분도거리분별185 V，375 A，110 L/min화107 mm，해삼수하적도층공극솔위1.07%，현미경도치위1097 HV0.3。경험증，공극솔급현미경도회귀방정분별괄합우표정분도전압、분도전류、아기류량화분도거리등공예삼수여NiCr-Cr3C2도층공극솔급현미경도적관계。
The Uniform Design method is used to investigate the effects of processing parameters on the porosity and micro-hardness of NiCr-Cr3C2 coating. The comprehension effects of the processing parameters, spray voltage, spray current, argon gas flow rate and spray distance, are analyzed using stepwise regression method. The results show that the third-order and the second-order polynomial regressed equations are the most appropriate equations to identify the influences of the processing parameters mentioned above on the porosity and micro-hardness. As a result of the regressed polynomial which is analyzed in mathematic ways, the most suitable processing parameters by means of uniform design experiment are acquired and the spray voltage, spray current, argon flow rate and spray distance are 185 V, 375 A, 110 L/min and 107 mm respectively. The porosity and micro-hardness of coating prepared at the most suitable processing parameters are 1.07%and 1 097 HV0.3 respectively. The verification experiment shows that the equations acquired are proper to identify the relationship between the spray parameters investigated(spray voltage, spray current, argon gas flow rate and spray distance) and the porosity and micro-hardness of NiCr-Cr3C2 coating.