H08Mn2SiA钢加工硬化及再结晶特性

Characteristics of Workhardening and Recrystallization of H08Mn2SiA steel

关键词:  气体保护焊丝用钢  加工硬化  退火再结晶

Key words:  steel for CO₂ welding  workhardening  recrystallization

摘要:

随着工业技术的不断进步,气体保护焊接工艺越来越多地受到重视和应用。本文对CO₂气体保护焊丝品种中应用最广泛的H08Mn2SiA钢不同变形量的试样进行常规力学性能检验和显微硬度检测。分别对不同变形量的试样,经过不同温度的再结晶退火后测定铁素体晶粒和显微硬度。为了表示各因素对H08Mn2SiA钢冷拔加工硬化特性及再结晶规律的影响趋势,对试验数据进行了线性回归。H08Mn2SiA钢因含有较多的Mn和Si,合金铁素体有较强的加工硬化特性。工业应用的再结晶退火工艺以640~660℃为佳。在以缩短加热周期为目的的工艺操作中采用700℃或稍高一点的再结晶温度加热,不会使铁素体晶粒长得过分粗大。

Abstract:

This paper introduces the characteristics Of workhardening and recrystallization of 0.08C 2Mn 1Si steel that widely used to CO₂ welding. In order to impress the changes of the characteristics of workhardening and the recrystallization of H08Mn2SiA steel, a regress method was adopted in experiment. The H08Mn2SiA steel has good characteristics of workhardening.The best temperature for the industrial technology of recrystallization is from 640℃ to 660℃.In order to shorten the time, it is possible for recrystallization temperature to heat steel ill 700℃ or higher temperature.