低温轧制硬质合金辊环粘结相成分优化研究  

Study on Optimization of Chemical Composition of the Adhesive Phase in Cemented Carbide Roll Ring for Low Temperature Rolling

作　　者：刘和平 李晶 周颖 彭秧锡 谢长清 赵勇 LIU He-ping;LI Jin;ZHOU Ying;PENG Yang-xi;XIE Chang-qing;ZHAO Yong(Hunan Tianyi High-tech Materials Manufacture Co.,Ltd.,Loudi 417000,China;Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials,School of Materials and Environmental Engineering,Hunan University of Humanities,Science and Technology,Loudi 417000,China)

机构地区：[1]湖南天益高技术材料制造有限公司,湖南娄底417000 [2]湖南人文科技学院材料与环境工程学院精细陶瓷与粉体材料湖南省重点实验室,湖南娄底417000

出　　处：《稀有金属与硬质合金》2021年第4期81-86,93,共7页Rare Metals and Cemented Carbides

摘　　要：重点研究了硬质合金辊环粘结相成分的优化,以提升其断裂韧性。第一性原理计算结果表明,增加粘结相中镍含量,可稳定粘接相为面心立方结构,使其成键性减弱,磁性降低,从而显著提升硬质合金的断裂韧性和延展性。实验结果表明,将粘结相中钴全部替换成镍后,硬质合金的断裂韧性提升了29%。利用这一成果开发的高镍硬质合金辊环系列新产品,在螺纹钢低温轧制过程中的开裂现象明显减少。Study on optimization of chemical composition of the adhesive phase in cemented carbide roll ring was emphatically carried out.The results of the first-principle calculation show that increasing the nickel content in the adhesive phase can stabilize the face-centered cubic structure of the adhesive phase,weaken the bondability and reduce the magnetic properties,thereby significantly improving the fracture toughness and ductility of the cemented carbide.The experimental results show that the fracture toughness of the cemented carbide is increased by 29%after all the cobalt in the adhesive phase is replaced with nickel.The new series of high-nickel cemented carbide roll ring products,which is developed according this achievement,has significantly reduced cracking phenomenon during low-temperature rolling of rebar steel.

关 键 词：硬质合金 辊环 粘结相 镍含量 低温轧制 第一性原理计算 

分 类 号：TG135.5[一般工业技术—材料科学与工程]