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通过高能喷丸对TC17合金进行表面处理,喷丸空气压力为0.35～0.55 MPa,喷丸时间为15～60 min。测量了TC17合金高能喷丸处理后最表层至基体的显微硬度。测量结果表明,显微硬度随深度的增大而逐渐减小,且不同深度处显微硬度随空气压力与喷丸时间的变化各不相同。建立了TC17合金高能喷丸处理后表层显微硬度的模糊神经网络模型。借助该模型,显微硬度的预测值与测量值的最大相对误差为8.5%,平均误差为3.2%。基于模糊神经网络模型,研究了空气压力与喷丸时间对TC17合金高能喷丸处理后不同深度处显微硬度的影响。结果表明,细化层的脱落与连续的晶粒细化作用之间有显著的交互作用。
The surface treatment of TC17 alloy by high-energy shot peening, shot peening air pressure of 0.35 ~ 0.55 MPa, shot peening time of 15 ~ 60 min. The microhardness of TC17 alloy after shot peening was measured. The measurement results show that the microhardness decreases with the increase of the depth, and the microhardness varies with the air pressure and shot peening time at different depths. The fuzzy neural network model of surface microhardness of TC17 alloy shot peening was established. With this model, the maximum relative error between predicted and measured values of microhardness is 8.5% and the average error is 3.2%. Based on the fuzzy neural network model, the effects of air pressure and shot peening time on the microhardness of TC17 alloy after shot peening at different depths were studied. The results show that there is a significant interaction between thinning layer shedding and continuous grain refinement.