基于激光熔覆与表面堆焊工艺锤头组织性能对比研究  

Comparison on microstructures and properties of forging hammer by laser cladding and surfacing welding treatment

作　　者：王力杰[1] 时静 闫志飞[1] 刘素芬[1] 李永峰[1] 侯永亮[1] WANG Lijie, SHI Jing, YAN Zhifei, LIU Sufen, LI Yongfeng, HOU Yongliang(1 .Ningbo Branch of Chinese Aedemy of Ordnance Science, Baotou 014034, China; 2.Baotou Nanjiao Rural Credit Association Co. Ltd, Baotou 014010, Chin)

机构地区：[1]中国兵器科学研究院宁波分院,内蒙古包头014034 [2]包头市南郊农村信用联社股份有限公司,内蒙古包头014010

出　　处：《兵器材料科学与工程》2018年第2期77-79,共3页Ordnance Material Science and Engineering

摘　　要：采用表面堆焊和激光熔覆两种工艺对精锻机锤头进行表面处理,利用光学金相显微镜、硬度测试仪等手段,研究锤头的微观结构与界面特征,测定层深,对锤头做性能分析,研究对比两种工艺锤头的理化性能。结果表明:表面堆焊锤头对基体的热影响层厚达4.65 mm,界面处基体晶粒长大,硬度较低;而激光熔覆技术对基体影响较小,热影响层厚为1.71 mm,界面处晶粒变化不大,工作层硬度最高达到64.0HRC,在界面结合处硬度实现了平稳过渡。The surface of forging hammers was treated by laser cladding and surfacing welding treatment. The influence ofmicrostructures, interface characteristics, thickness on the properties of forging hammers were compared and studied bymetallographic microscope and hardness tester. The results show that the thickness of＂ heat-affected layer of the hammer treated bysurfacing welding is 4.65 mm, grains grow at the interface and the hardness is lower. While the heat-affected layer thickness ofhammer treated by laser cladding is only 1.71 mm, the maximum hardness of which reaches 6d..0HRC and the hardness of theinterface is steady, and the grains at the interface are little changed.

关 键 词：精锻机锤头 激光熔覆 表面堆焊 界面特征 

分 类 号：TG141[一般工业技术—材料科学与工程]