一种硬度排序分析法  

Hardness Sorting Method

作　　者：李卓[1] 许军锋[1] 汪肖 王妍 LI Zhuo;XU Junfeng;WANG Xiao;WANG Yan(The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices,Xi’an Technological University,Xi’an 710021,China;School of Material Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]西安工业大学光电功能材料与器件陕西省重点实验室,西安710021 [2]郑州大学材料科学与工程学院,郑州450001

出　　处：《西安工业大学学报》2021年第4期389-396,共8页Journal of Xi’an Technological University

基　　金：国家自然基金(51971166);陕西省教育厅项目(18JS050);凝固技术国家重点实验室开发项目(SKLSP201812)。

摘　　要：为改善材料硬度研究中出现的压痕偏离目标或数据结果误差等问题,文中提出了一种新型硬度分析法,采集试样目标区域的随机硬度,将所得数据从小到大进行排序,通过数值范围和分布斜率分析各种工艺对组织硬度的影响。分析了过冷度、过冷保温处理和热处理对Fe-B、Ni-B、Al-Si合金硬度的影响规律,并以文献报道的Bi_(2)Te_(3-x)Se_(x)复杂合金硬度变化分析验证了文中方法。研究结果表明:在Fe-B合金深过冷凝固过程中,过冷度越大,固溶体相α-Fe硬度越大,金属间化合物Fe_(2)B相硬度越小;随着Ni-B合金保温时间的延长,固溶体相ɑ-Ni的显微硬度下降,金属间化合物Ni3B相的显微硬度上升;Al-Si合金保温温度越高,初生硅硬度越大,α-Al硬度越小。文中方法能快速的呈现不同合金熔体过冷度、保温时间、热处理工艺和熔炼工艺等对材料硬度的影响规律,较准确判断材料被处理前后整体的成分分布变化或者组织性能的微弱变化情况。In order to solve the problems of the indentation deviation target or data result errors in the study of material hardness,a new method for analyzing the hardness of alloys is proposed.Hardness data in the target area of the sample is collected randomly and then sorted from smallest to biggest.The effects of various processes on hardness are analyzed based on numerical range and distribution slope.The effects of undercooling,undercooling heat preservation and heat treatment on the hardness of Fe-B,Ni-B and Al-Si alloys were studied by this method,whose validity was proved by analyzing the hardness changes of Bi_(2)Te_(3-x)Se_(x) complex alloy reported in the literature.In the process of high undercooling solidification of Fe-B alloy,with the increase of undercooling,the microhardness of theα-Fe increased and that of Fe_(2)B decreased.With the extension of holding times of Ni-B alloy,the microhardness of theα-Ni decreased and that of Ni3B increased.With the increase of holding temperature of Al-Si alloy,the microhardness of primary silicon increased and that ofα-Al decreased.The results show that the method proposed in this paper can quickly show the effects of different undercooling,holding time,heat treatment on the hardness of alloys,and can accurately determine the overall composition distribution changes or the slight changes of the microstructure performance of the materials before and after being processed.

关 键 词：硬度测定 显微硬度 过冷度 热处理 

分 类 号：TG111.4[金属学及工艺—物理冶金]