Research on the Process and Prediction Model for Size of 316L Stainless Steel Fabricated by Plasma Arc Additive Manufacturing

doi:10.3901/JME.2019.15.031

Abstract

Abstract: The influence of process parameters of plasma arc additive manufacturing on the size of single layer single pass bead is studied by single factor method with 316L stainless steel powder. The results show that a good process window with the powder feeding speed about 5-12 g/min, welding speed about 300-600 mm/min, and the current about 30-50 A.A quadratic general rotary combination test is taken to establish a prediction model of straight arm size based on quadratic regression equation with current, welding speed, powder feeding speed as input and the width and height as output. The influence on the width of straight arm body is:current > powder feeding speed > welding speed, and the order of influence on layer height is:powder feeding speed > current > welding speed. Two groups of straight arm tests are used to verify the accuracy of the model. The errors between the experimental results and the predicted values are less than 5%, which showed that the model had a good prediction effect. And the mechanical properties analysis is found that the tensile strength about 560 MPa or more is higher than the casting part.

Key words: additive manufacturing, dimension prediction model, plasma arc, process, quadratic general spinning design

CLC Number:

TG456

YANG Yongqiang, WENG Changwei, ZHOU Quan, SONG Changhui, CHEN Jie. Research on the Process and Prediction Model for Size of 316L Stainless Steel Fabricated by Plasma Arc Additive Manufacturing[J]. Journal of Mechanical Engineering, 2019, 55(15): 31-38.

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