摘要
为反映退火碳钢含碳量的客观数值,弥补传统金相观察法存在主观估计偏差缺陷和需要制作金相试样的过程周折,实验中采用简易的硬度测量法对退火碳钢的硬度进行测量,并对测量数据进行相关性分析,得到退火碳钢含碳量与硬度线性相关的特性。利用最小二乘法拟合,得到硬度与含碳量的线性回归方程,并以此实现对未知退火碳钢的估计。通过金相组织观察及杠杆定律法对未知碳钢含碳量进行估计,结果与硬度测量法测定的含碳量基本一致。与金相图谱比对再次验证实验结果。硬度测量法可以实现对未知退火碳钢更客观、更准确的估计,并节省了制作金相试样的时间和成本。
To reflect the objective carbon content of annealed carbon steel,and make compensation for the offset deficiency of subjective estimation by traditional metallographic observation method and the cost of making metallographic sample,hardness measurement is conveniently applied to assess the carbon content.Through practical hardness measurement of annealed carbon steel,the characteristics of linear relativity of carbon content and hardness is discovered.Applying the fitting method of least square,the linear regression equation is obtained,which is used to estimate the carbon content of unknown carbon steel.Meanwhile,through metallographic observation and lever law,unknown carbon content is estimated,the result of which is similar to the result of hardness measurement.Finally,in contrast with standard metallographic chart,the conclusion is further approved.A comparison of the above methods indicates that hardness measurement is more impersonal and accurate,and can save the time and cost of making metallographic samples.
出处
《实验室研究与探索》
CAS
北大核心
2012年第1期50-52,共3页
Research and Exploration In Laboratory
关键词
硬度
碳钢
含碳量
线性相关
最小二乘法
拟合
回归方程
金相观察
杠杆定律
hardness
carbon steel
carbon content
linear relativity
least square method
fitting
regression equation
metallographic observation
lever law
