摘要
研究了粒状贝氏体对超低碳含铜时效钢粗晶热影响区(CGHAZ)冲击韧性的影响。结果表明,粒状贝氏体中M A岛的含量和尺寸对超低碳含铜时效钢CGHAZ的冲击韧性有显著影响。当 M- A岛的数量少、尺寸小(其体积分数小于3%,尺寸小于1μm)时,粒状贝氏体对CGHAZ的冲击韧性影响不大;当 M -A岛的数量多、尺寸大(其体积分数大于3%,尺寸大于1μm)时,CGHAZ的冲击韧性显著下降。通过降低钢中的碳及碳化物形成元素的含量可减少CGHAZ中粒状贝氏体的数量,从而提高钢的CGHAZ的冲击韧性。
The effect of granular bainite on impact toughness of CGHAZ of Ultra-low carbon copper-bearing age hardening steel was studied. The result showed that the quantity and dimension of M-A islands in granular bainite has a great effect on impact toughness of CGHAZ of ultra-low carbon copper-bearing age hardening steel. There is no visible effect on impact toughness when the amount of M-A islands is under 3 percent and the dimensions of M-A islands less than 1 μm. But impact toughness is decreased greatly when the amount of M-A islands exceeds 3 percent and the dimensions of M-A islands exceed 1 μm. The content of granular bainite is decreased with the decrease of carbon and carbide forming elements, and the impact toughness of CGHAZ of the steel is increased at the same time.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2005年第1期42-46,共5页
Journal of Iron and Steel Research
关键词
粒状贝氏体
含铜时效钢
粗晶热影响区
冲击韧性
granular bainite
copper-bearing age-hardening steel
coarse-grained heat affect zone
impact toughness
