| Ta1/0Cr18Ni9薄板储能焊熔核高熵化机理 |
| |
| 引用本文： | 翟秋亚,刘帅宾,杨全虎,叶建林,徐锦锋.Ta1/0Cr18Ni9薄板储能焊熔核高熵化机理[J].焊接学报,2020,41(8):79-84. |
| |
| 作者姓名： | 翟秋亚 刘帅宾 杨全虎 叶建林 徐锦锋 |
| |
| 作者单位： | 1.西安理工大学，西安，710048 |
| |
| 基金项目： | 陕西省自然科学基金重点项目;西安市高校院所人才服务企业工程计划 |
| |
| 摘 要： | 针对钽与钢之间物化性质差异大，焊接时易产生脆性金属间化合物而导致熔焊接头性能低下及裂纹等问题，按照熔核金属高熵化技术思路，利用基于密度泛函理论的热力学第一性原理设计出新型中间层合金Ta20Fe20Ni20Cr20Co20，结合熔合比得到适用于钽/钢储能焊中间层合金成分为Ta7Ni32Cr19Co42. 采用真空电弧炉熔制纽扣合金锭，继而使用单辊急冷法制备出中间合金箔材，将其用于Ta1/0Cr18Ni9薄板的储能焊连接. 结果表明，在储能焊条件下，Ta1/Ta7Ni32Cr19Co42/0Cr18Ni9搭接接头形成形貌规则、完整，长径约0.8 mm的扁球形熔核，熔核整体向钢侧发生了偏移. 熔核组织由简单的FCC固溶体组成，无金属间化合物析出，具有典型的高熵合金特征，实现了熔核金属高熵化. 在焊接电压1 000 V，电容500 μF，电极压力30 N下，Ta1/Ta7Ni32Cr19Co42/0Cr18Ni9储能焊接头平均强度可达到395 MPa.
|
| 关 键 词： | Ta1 0Cr18Ni9 储能焊 熔核高熵化 |
| 收稿时间： | 2020-07-06 |
High entropy mechanism of nugget in Ta1/0Cr18Ni9 sheet energy storage welding |
| |
| Affiliation: | 1.Xi’an University of Technology, Xi’an, 710048, China2.Xi’an Younite Container Manufacturing Co., Ltd., Xi’an, 710201, China |
| |
| Abstract: | In this paper, in view of the difference of physical and chemical properties between tantalum and steel,which is easy to produce brittle intermetallic compounds during welding, resulting in poor performance and cracks of fusion welded joints. According to the idea of high entropy technology of nugget metal, a new type of interlayer alloy Ta20Fe20Ni20Cr20Co20 was designed based on the first principles of thermodynamics based on density functional theory. Combined with fusion ratio, the composition of intermediate layer alloy suitable for tantalum/steel energy storage welding is Ta7Ni32Cr19Co42. The button alloy ingot was melted by vacuum arc furnace, and then the middle alloy foil was prepared by single roll quenching method, which was used for energy storage welding connection of Ta1/0Cr18Ni9 sheet. The results show that under the condition of energy storage welding, Ta1/Ta7Ni32Cr19Co42/0Cr18Ni9 lap joint has formed a flat spherical nugget with regular and complete morphology and about 0.8 mm long diameter, and the nugget has shifted to the steel side as a whole.The nugget structure consists of simple FCC solid solution and no intermetallic compound precipitation. It has typical characteristics of high entropy alloy and realizes high entropy of nugget metal. The average strength of Ta/Ta7Ni32Cr19Co42/0Cr18Ni9 energy storage welding joint can reach 395 MPa under the welding voltage of 1 000 V, capacitance of 500 μF and electrode pressure of 30 N. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载全文 |
|
