紧固件用非调质钢的抗应力松弛性能  

Anti-stress relaxation ability of non-quenched and tempered steel as fasterners

作　　者：皮锦红[1] 王章忠[1] 蔡璐[1] 赵秀明[1] 吴海峰[1] 

机构地区：[1]南京工程学院材料工程学院,江苏南京211167

出　　处：《金属热处理》2013年第8期53-55,共3页Heat Treatment of Metals

基　　金：江苏省普通高校科研成果产业化推进项目(JHB2011-25);江苏省大学生科技创新训练项目(201211276209)

摘　　要：为了研究时效处理对非调钢抗应力松弛能力的影响规律,对冷拔非调质钢MFT8在300℃进行了不同时间的时效处理。结果表明,随着时效时间的延长,铁素体晶内不断析出亚微米级第二相颗粒,使得冷拉拔态非调质钢MFT8的硬度及抗应力松弛性显著提高,且随时效时间的延长,硬度和抗应力松弛性能不断提高,但增幅逐渐降低。在本试验条件下,300℃时效2 h后获得了最佳的抗应力松弛性能。Non-quenched and tempered MFT8 steel was aged at 300 ℃ for different time to figure out the effects of aging procedure on the anti-stress relaxation ability of the cold drawn non-quenched and tempered steel.The results show that the second phase submicron particles continuously precipitate within the ferrite grains during aging,which results in the significant improvement of hardness and anti-stress relaxation ability of the non-quenched and tempered MFT8 steel,while the amplification is reduced with aging time.Under this experimental conditions,the non-quenched and tempered MFT8 steel aged at 300 ℃ for 2 h exhibits the best anti-stress relaxation ability.

关 键 词：MFT8非调质钢 时效 抗应力松弛性能 

分 类 号：TG142.12[一般工业技术—材料科学与工程]