论文部分内容阅读
一、试验目的双相钢自七十年代问世以来,普遍受到了重视,并从成分、热处理工艺方面进行了大量的研究工作。但对于钢中的组织、在临界区加热期间,铁素体的再结晶及其晶粒长大和珠光体的分解,奥氏体的形成和奥氏体冷却过程中向马氏体岛转变及其两者间数量关系,以及转变各阶段的力学性能等方面的工作报导的较少。然而开展这方面工作,将有助于合理的制定热处理工艺,稳定钢材性能。本文研究的目的,是通过组织和性能间的对照观察,提出性能与组织兼优的加热保温时间范围。二、试验过程试验用钢由中频感应电炉和50吨顶吹氧气转炉中熔炼,化学成分见表1。钢锭经热锻开坯或热轧,冷轧板的厚度为0.8～1毫米,
First, the purpose of the test Duplex steel since the advent of the seventies, has received widespread attention, and from the composition, heat treatment process conducted a lot of research work. However, for the microstructure in steel, during the critical zone heating, recrystallization of ferrite and its grain growth and pearlite decomposition, the formation of austenite and the transformation to martensite during austenite cooling and its The quantitative relationship between the two, as well as changes in the various stages of the mechanical properties and other aspects of the work reported less. However, carrying out this work will help to formulate a reasonable heat treatment process to stabilize the performance of steel. The purpose of this study is to propose a range of heating and holding time with good performance and good organization through the comparison between the organization and the performance. Second, the test process The test steel by the intermediate frequency induction furnace and 50 tons of top-blowing oxygen converter melting, chemical composition shown in Table 1. Steel slabs by hot forging billet or hot rolled, cold rolled sheet thickness of 0.8 to 1 mm,