日本金属学会誌

J. Japan Inst. Metals, Vol. 69, No. 8 (2005),
pp. 727-730

Pulsed Current Hot Pressing of Chromium-Plated SUS304L Stainless Steel and Titanium

Toru Nagaoka, Kiyoshi Mizuuchi, Masami Sugioka and Masao Fukusumi

Department of Processing Technology, Osaka Municipal Technical Research Institute, Osaka 536-8553

Abstract:

Joints composed of stainless steel and Ti were fabricated from Cr-plated SUS304L alloy rods and Ti rods using vanadium foil as an insert metal, in a process using pulsed current hot pressing (PCHP) equipment. The effects of the bonding temperature and the thickness of the Cr-plate layer on the mechanical properties of the joints were investigated. Tensile testing at 300 K and microstructural observations were carried out.
The joints fabricated at 1173 K from 20 μm thick Cr-plated SUS304L rods and Ti rods showed the highest tensile strength of 340 MPa. SEM-EDS analyses revealed that the Cr-plate layer was left after PCHP process and no intermetallic compounds formed at the bonding interfaces. The cracks originally existed in the Cr layer plated on SUS304L rods disappeared perfectly during PCHP process at 1273 K.
In contrast, the joints fabricated from 5 μm thick Cr-plated SUS304L rods and Ti rods showed the lowest tensile strength because of the formation of FeV intermetallic compound in the bonded interlayer.


(Received 2005/4/12)

Keywords:

diffusion bonding, SUS304L stainless steel, titanium, chromium plating, intermetallic compound, pulsed current hot pressing


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