摘要
本文运用金相组织分析的手段 ,对具有可比性的反弯试验的三种热处理制度下的样品进行分析 ,展示了金相组织与反弯性能之间的联系。验证了‘较快的冷却速度可以使亚共析钢的共析点向低碳方向偏移’这一论点 ,认为在化学成份符合标准要求的前提下 ,HRB4 0 0反弯断裂与其金相组织异常关系密切 ,金相组织异常的表现为针状或尖角状铁素体含量的多或少 ,而造成金相组织异常的主要原因是终轧温度不适当和轧后冷却速度不适当。
The article analyses the samples under the three heat treatment systems of inflection test with comparability,and illustrates the relation between metallographic structure and inflection performance.It verifies that the fast cooling speed can tranfer the eutectoid point of hyposteel towards the direction of low carbon ,and thinks that HRB 400 inflection fragmentation has very close relation with its metallographic structure if the chemical contents structure features the amounts of needle or pointed ferrite ,but the main reason is non-suitable final rolling temperature and cooling speed after rolling.
出处
《河南冶金》
2003年第4期16-19,共4页
Henan Metallurgy
