铣削参数对A100合金钢表面组织及显微硬度的影响  

Effect of milling parameters on surface microstructure and properties of A100 alloy steel

作　　者：张昌明[1,3] 周亮 王运 张昱 张会[1] 王永鑫 ZHANG Chang-ming;ZHOU Liang;WANG Yun;ZHANG Yu;ZHANG Hui;WANG Yong-xin(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Military Representative Office in Hanzhong,Hanzhong 723200,China;Shaanxi Key Laboratory of Industrial Automation,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000 [2]驻汉中地区军事代表室,陕西汉中723200 [3]陕西理工大学陕西省工业自动化重点试验室,陕西汉中723000

出　　处：《材料热处理学报》2021年第1期173-180,188,共9页Transactions of Materials and Heat Treatment

基　　金：陕西省科技厅项目(2020GY-121)。

摘　　要：采用扫描电镜和显微硬度仪分析了不同铣削加工工艺参数对A100合金钢表面组织和显微硬度的影响,并通过纳米压痕试验对硬度变化规律进行了验证。结果表明:靠近加工表面时A100合金钢的马氏体组织形状细小,而远离加工表面时马氏体组织形状较粗大,不同的切削参数对马氏体组织形状变化影响不同;通过极差分析得出了对显微硬度值影响大小的顺序为铣削深度>进给量>铣削宽度>转速,由显微硬度曲线图得出靠近铣削加工表面时显微硬度约410 MPa,远离铣削加工表面时,显微硬度呈现下降的趋势,最终约为345 MPa,通过纳米压痕试验对显微硬度变化规律进行了验证并得到相同结论。Effect of different milling process parameters on surface microstructure and microhardness of A100 alloy steel was analyzed by scanning electron microscopy and microhardness tester, and the hardness variation was verified by nanoindentation test. The results show that the martensite of the A100 alloy steel is small near the machined surface, and the martensite far away from the machined surface is coarse. Different cutting parameters have different effects on the shape change of the martensite. The order of influence on microhardness value is milling depth > feed rate> milling width > rotational speed. The microhardness curves show that the microhardness of the alloy steel near milling surface is about 410 MPa, and the microhardness decreases with the distance away from the milling surface, and is finally about 345 MPa. The variation of microhardness is verified by nanoindentation test and the same conclusion is obtained.

关 键 词：A100合金钢 铣削加工 显微硬度 显微组织 纳米压痕 

分 类 号：TG142.3[一般工业技术—材料科学与工程]