基于热模拟的G3钢双丝埋弧焊粗晶区组织和磨损性能研究  

Research on Coarse Grain Zone Microstructure and Abrasion Properties of G3 Steel Welded with Double-wire Submerged Arc Welding Based on Thermal Simulation

作　　者：欧阳文凯 陈冰泉[1] 黄永溪 

机构地区：[1]武汉理工大学华夏学院,湖北武汉430223 [2]中铜邢台机械轧辊有限公司修复公司,河北邢台054025

出　　处：《热加工工艺》2015年第17期192-194,共3页Hot Working Technology

摘　　要：利用热模拟试验机Gleeble3500模拟单、双丝埋弧焊条件下线能量分别为19、25、39、50 k J/cm时的G3钢粗晶区组织。对模拟的粗晶区组织、硬度和耐磨性能进行了研究。结果表明,随线能量增加,粗晶区晶粒长大,同时针片状析出物析出、聚集、长大。线能量≤39 k J/cm时,其对粗晶区的硬度、耐磨性等影响不大,但当线能量增加到50 k J/cm时,粗晶区晶粒显著长大,析出物有重熔迹象,硬度降低、耐磨性变差。By thermal simulated test machine Gleeble 3500, the coarse grain zone structures of G3 steel under the conditions of one and two-wire submerged arc welding were simulated. The simulated heat inputs are 19 kJ/cm, 25 10/cm, 39 kJ/cm, and 50 kJ/cm, respectively. The simulated coarse grain zone structures and hardness, abrasion properties were researched. The results show that with heat input increasing,the grains of coarse grain zone grow, and needle flake precipitates appear, assemble, and grow. When heat input is ≤ 39 kJ/cm, which has little influence on hardness and wear resistance of coarse grain zone. However, when the heat input increases to 50 kJ/cm, the grains of coarse grain zone grow significantly, there are some remelting signs of precipitates, then, the hardness reduces and the wear properties of coarse grain zone deteriorate.

关 键 词：热模拟 粗晶区 双丝埋弧焊 磨损性能 

分 类 号：TG457.11[金属学及工艺—焊接] TG445