隔膜压缩机膜片PIP处理改性研究

PIP treatment modification of diaphragm compressor

根据膜片表面出现拉应力引起疲劳开裂的具体情况,借助可控离子渗入(PIP)处理技术制备出了混合有氮过饱和固溶体的化合物渗层。结果表明,PIP处理在316L不锈钢膜片表面形成了硬度达1000 HV0.1以上,压应力大于280 MPa,应力层深度约16μm的渗层,能够确保膜片工作过程中表面不再出现拉应力,从而延长膜片寿命至1000 h以上。

With the programmable ion permeation(PIP)treatment technology and according to the specific situation of fatigue cracking caused by tensile stress on the diaphragm surface,a compound permeation layer with nitrogen supersaturated solid solution was prepared.The results show that a infiltrated layer with hardness of over 1000 HV0.1,compressive stress higher than 280 MPa and depth is about 16μm on the surface of the 316 L stainless steel diaphragm after PIP treatment.It ensures that no surface tensile stress present in the working process of the diaphragm,so that the working life of the diaphragm is prolonged.