多层金属复合板的热轧制备方法

doi:10.11868/j.issn.1001-4381.2015.000579

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摘要

提高成材率和复合界面质量是制备多层复合板的难题。本工作提出一种多层复合板的高成材率热轧制备方法，即采用氩弧焊固定各层原料板组成坯料，坯料放入金属套后抽真空，再加热到1000~1200℃进行多道次轧制，成功制备出2.5mm厚的67层复合板。通过金相显微镜及电子显微镜观察和分析了界面组织及元素扩散行为，采用拉伸、剪切实验测定复合板的力学性能，并分析其剪切断口。结果表明：采用两步组坯复合和工艺优化，多层复合板的轧制成材率达90%以上。多层复合板具有良好的结合界面，其抗剪强度达到241MPa。9Cr18和1Cr17镍中间层可以较为有效地阻碍界面附近的碳扩散并改善复合板的组织特征。

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	余伟
	王班
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	雷力齐

关键词 ：多层金属复合板, 热轧工艺, 组织, 力学性能, 扩散

Abstract：

For multi-layer plate, it is a difficult problem to increase product yield rate and improve bonding interface quality. A high yield hot-rolled method of multilayered plate was proposed. The raw strips and plate were fixed by argon arc welding. The combined billet was put into a metal box and vacuum pumped, and then heated and rolled by multi passes at the temperature of 1000-1200℃. The 67 layered plate with the thickness of 2.5mm was successfully produced. The interfacial microstructures and diffusion behavior were investigated and analyzed by optical microscopy and scan electronic microscopy. The tensile and shear strength were tested,and the shear fractures were analyzed. The results show that the multilayered plate yield rate is more than 90% by two steps billet combination method and rolling process optimization. The good bonding interface quality is obtained, the shear strength of multilayered plate reaches 241 MPa. Nickel interlayer between 9Cr18 and 1Cr17 can not only prevent the diffusion of carbon, but also improve the microstructure characteristics.

Key words： multilayered plate hot-rolled process microstructure mechanical property diffusion

收稿日期: 2015-05-11 出版日期: 2017-02-23

中图分类号:

TG335.8

通讯作者: 余伟 E-mail: yuwei@nercar.ustb.edu.cn

作者简介: 余伟(1968-),男,副研究员,博士,从事材料组织性能控制及金属复合材料制备研究,联系地址:北京科技大学冶金工程研究院(100083),yuwei@nercar.ustb.edu.cn

引用本文:

余伟, 王班, 贺婕, 徐士新, 雷力齐. 多层金属复合板的热轧制备方法[J]. 材料工程, 2017, 45(2): 32-38.
Wei YU, Ban WANG, Jie HE, Shi-xin XU, Li-qi LEI. Hot-rolled Process of Multilayered Composite Metal Plate. Journal of Materials Engineering, 2017, 45(2): 32-38.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000579 或 http://jme.biam.ac.cn/CN/Y2017/V45/I2/32

Table 1 实验材料的化学成分 (质量分数/%)

Fig.1 组坯抽真空示意图

Fig.2 轧制工艺示意图

Fig.3 单搭接剪切试样尺寸示意图

Fig.4 组坯方式对多层金属复合板成材率的影响
(a)一步组坯轧制的中间坯；(b)两步组坯轧后的中间坯

Fig.5 多层复合板的金相组织 (a)单侧及中心部位；(b)2Cr13/1Cr17交替层

Fig.6 试样边部金相照片

Fig.7 界面处SEM像(a)及EDS能谱分析(b)

Fig.8 Gleeble热模拟试样界面组织 (a)不加Ni层；(b)添加Ni层

Table 2 复合基材和复合板力学性能

Fig.9 界面处显微硬度分布 (a)硬度实验压痕；(b)硬度分布

Fig.10 剪切断口形貌 (a)混合断口；(b)解理断口；(c)韧窝断口

Table 3 块状物质元素构成及比例的能谱分析(原子分数/%)

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