In the field of efficient and compact diffusion-welding microchannel heat exchangers,this study con-ducts collaborative research on the sample performance of microchannel structure plates under different welding pressure curves and holding time,in order to study the influence of diffusion-welding parameters on their welding performance,so as to ensure the diffusion-welding strength of diffusion-welding microchannel heat exchangers.The results show that when temperature is raised to 1 060℃,welding pressure is released once after holding tem-perature for 80 minutes,reducing the welding pressure from 8 MPa to 2 MPa,then the pressure is regularly in-creased,and that the pressure increase rate is controlled at 0.4 MPa/min and below,which can help increase the welding strength of microchannel plates.
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