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钢的奥氏体(本质)晶粒度,是指当钢材加热至临界点Ac_3以上某一规定温度并保温一定时间后所具有的奥氏体晶粒大小。它表示了钢中奥氏体晶粒在规定温度下的长大倾向。钢的奥氏体(本质)晶粒度,对材料的工艺性能、机械性能及热处理都有重大的影响。故奥氏体(本质)晶粒度(以下简称奥氏体晶粒度)的测定一般都列入钢的常规检验标准中。本文主要是对各种显示和测定奥氏体晶粒度的方法,作一综述介绍。测定方法概述奥氏体晶粒度的测定方法,大体上可分为直接观
Steel austenitic (essential) grain size, refers to the steel when heated to a critical temperature Ac_3 above a certain temperature and holding a certain time after the austenite grain size. It shows the tendency of austenitic grains in steel to grow at the specified temperature. The austenitic (essential) grain size of steel has a significant effect on the material’s processability, mechanical properties and heat treatment. Therefore, the austenite (essential) grain size (hereinafter referred to as austenite grain size) are generally included in the determination of the conventional steel testing standards. This article is mainly for a variety of methods for the display and determination of austenite grain size for a review of the introduction. Measurement methods Overview Determination of austenite grain size can be broadly divided into direct view