湖南大学学报（自然科学版）2017，Vol.44Issue(12)：34-39,6.DOI:10.16339/j.cnki.hdxbzkb.2017.12.006
硬质合金YG8与D6A异种金属CO2激光焊接接头组织和性能的研究
Study of the Microstructure and Properties of YG8 /D6A Dissimilar Metal CO2 Laser Welding Joints
摘要
Abstract
Cemented carbide wires YG8 and ultrahigh-strength steel strips D6A were welded on the band saw blade by using CO2 laser .The typical microstructure of welding joints ,the distribution of element ,and influence of different bonding technologies on welding joints microstructure and mechanical properties were studied by using metalloscope ,electron microscope(SEM) ,microhardness meter and electron (EPMA) .The results showed that iso-metric increased ,dendrite decreased in the weld center and isometric near the side of YG 8 fusion boundary area be-came more fine with the increase of welding speed .The hardness of the welding joints every bonding technology was higher than parent metal .Moreover ,the hardness of the bond area near the side of YG8 was higher than the welded zones .When the welding power was 3960 W and the welding speed was 9 m/min ,the property of the wed-ded joints was good ,and the value of bending strength reached 349 MPa ,which reached the requirements of double metal band saw blade welding .关键词
硬质合金/异种金属焊接/显微组织/力学性能Key words
cemented carbide/dissimilar metal welding/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
陈刚,黄宇,周明哲,贾寓真,郭喜如..硬质合金YG8与D6A异种金属CO2激光焊接接头组织和性能的研究[J].湖南大学学报（自然科学版）,2017,44(12):34-39,6.基金项目
湖南省自然科学基金资助项目(2016JJ2025) ,Natrural Science Foundation of Hunan Province (2016JJ2025) （2016JJ2025）
