کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5468380 | 1518931 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure transformation and crack sensitivity of WC-Co/steel joint welded by electron beam
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
The 30 mm thick WC-Co cemented carbide and AISI 1045 steel were electron beam welded (EBW) with and without Ni-based filler metal. Welding-brazing joints of WC-Co and steel were obtained as the molten pool wet and spread on the unmelted WC-Co base metal. The WC loose areas formed at the WC-Co interface have guaranteed the effective metallurgical bonding. According to simulation results, the thickness of filler metal should be less than 1 mm to avoid unbonding. The direct EBW WC-Co/steel joint was mainly composed of martensite, residual austensite and herringbone M6C carbides. The bulk brittle phases η-Fe3W3C increased the joint brittleness and crack sensitivity. With Ni-based filler metal, the microstructure of the joint was mainly composed of γ-Fe and herringbone carbides FeW3C. No η-Fe3W3C formed at WC-Co interface because of the metallurgical blocking effect. The plastic property of the joint was improved, and WC-Co/filler metal/steel EBW joints with no crack were obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 139, May 2017, Pages 26-32
Journal: Vacuum - Volume 139, May 2017, Pages 26-32
نویسندگان
Guoqing Chen, Binggang Zhang, Zhenzhong Wu, Xi Shu, Jicai Feng,