(青島理工大學(xué)機(jī)械工程學(xué)院，青島 266033)
摘 要: 對(duì)T2純銅表面進(jìn)行機(jī)械扭壓處理(SMPT)后，分別研究SMPT工藝參數(shù)中的工具頭轉(zhuǎn)速、水平進(jìn)給速度、下壓深度、處理次數(shù)以及潤(rùn)滑方式對(duì)材料表面顯微硬度的影響。結(jié)果表明：當(dāng)轉(zhuǎn)速由3000 r/min上升至5000 r/min時(shí)，材料表面顯微硬度逐漸增加，當(dāng)轉(zhuǎn)速達(dá)到6000 r/min時(shí)顯微硬度呈下降趨勢(shì)；工具頭水平進(jìn)給速度對(duì)材料表層顯微硬度影響較小；下壓深度的增加可以提高材料表層顯微硬度；當(dāng)處理次數(shù)為3次時(shí)顯微硬度達(dá)到最大值；采用水潤(rùn)滑方式效果要大于采用油潤(rùn)滑方式效果，而采用高溫潤(rùn)滑脂效果最差。
關(guān)鍵字: 純銅；表面機(jī)械壓扭處理；工藝參數(shù)；顯微硬度
（Department of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, China）
Abstract:T2 pure copper surface was dealed by surface mechanical pressure-torsion (SMPT), the effects of the technical parameters, such as the speed, horizon feed speed, pushing depth, treatment times as well as lubrication method, on the microhardness of material surface were studied. The results show that the microhardness of the material surface increases with the speed increasing from 3000 r/min to 5000 r/min. While the microhardness decreases when the speed increases to 6000 r/min. In addition, the effect of the horizon feed speed on the hardness is slight. The microhardness increases with the increase of pushing depth. The microhardness reaches the maximum after treatment for 3 times. The effect of lubrication method using water is better than that using oil, and the effect using high temperature grease is the worst.
Key words: pure copper; surface mechanical pressure-torsion; technical parameter; microhardness
