Zr微合金化HSLA钢粗晶热影响区的组织和性能  

Structure and Properties of Coarse Grain Heat Affected Zone of Zr Microalloying HSLA Steel

作　　者：习天辉[1] 陈晓[1] 陈颜堂[1] 浦绍康[1] 

机构地区：[1]武汉钢铁(集团)公司技术中心,武汉430080

出　　处：《特殊钢》2005年第2期16-19,共4页Special Steel

摘　　要：用焊接热模拟法研究了Zr处理对 (% ) :≤ 0 18C 1 2～ 1 6Mn低合金高强度 (HSLA)钢焊接粗晶热影响区 (CGHAZ)组织和性能的影响。试验结果表明 ,Zr含量在 0 0 1%～ 0 0 3%时 ,经过 30～ 10 0kJ cm线能量焊接热模拟后 ,CGHAZ的强度、塑性和 - 5 0℃冲击韧性都高于没有经过Zr处理的试验钢 ;Zr钢显微硬度(HV10 ) 177～ 2 5 1,具有优良的焊接性。焊接线能量相同时 ,没有经过Zr处理试验钢CGHAZ的晶粒比Zr处理钢粗大 ;焊接线能量为 30kJ cm时 ,各试验钢CGHAZ的组织以贝氏体为主 ,随着焊接线能量提高 。The effect of micro Zr on structure and mechanical properties of welding coarse grain heat affected zone (CGHAZ) of ≤0.18C-1.2～16Mn HSLA steel has been studied by welding thermal simulation method. The test results showed that with 30～100 kJ/cm heat input welding thermal simulation, the strength, plasticity and impact toughness at -50 ℃ of CGHAZ of steel containing 0.01%～0.03% Zr were higher than that steel non-containing Zr, and microhardness HV10 value of Zr steels was 177～251. The Zr steels had excellent weldablity and at same heat input the grain in CGHAZ of non-containing steel was coarser than that of Zr steel and with heat input of 30 kJ/cm the bainite was dominant in structure of CGHAZ while with increasing the heat input the acicular ferrite and few pearlite occurred in CGHAZ.

关 键 词：粗晶热影响区 组织和性能 HSLA钢 ZR 微合金化 CGHAZ 焊接线能量 焊接热模拟 针状铁素体 试验结果 冲击韧性 显微硬度 低合金 模拟法 焊接性 贝氏体 珠光体 强度 cm 塑性 晶粒 

分 类 号：TG401[金属学及工艺—焊接]