Monel400-Q345R爆炸复合板组织与性能研究

doi:10.11896/cldb.25010132

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Abstract The Monel400-Q345R composite plate fabricated via explosive welding was selected as the research subject in this paper, with a systematic investigation conducted on the microstructure, phase composition, and micro-mechanical properties of its explosive welding bonding interface. Additionally, critical electrochemical properties, specifically corrosion potential, and corrosion current of the Monel400-Q345R composite plate were measured using an electrochemical workstation. The results demonstrated that the interface of the explosive composite plate featured a periodic wavy bonding morphology. Specifically, the interface structure on the base plate side could be categorized into three distinct regions — a fine-grained zone, a fiber zone, and a twisted zone, whereas that on the cladding plate side consists solely of a fine-grained zone. Furthermore, a vortex structure was observed at the interface, comprising surface fine grains, columnar grains, and core cellular grains. In addition, the element diffusion layer at the bonding interface had a thickness of 8 μm, with the formation of the FeNi phase. On the base plate side, mechanical properties differed across distinct regions:ferrite in the fine-grained zone boasts the highest nanohardness (2.29 GPa) and elastic modulus (275.8 GPa);conversely, pearlite in the fiber zone achieved the highest nanohardness and elastic modulus, registering 2.56 GPa and 271.2 GPa sequentially. On the cladding plate side, the fine-grained zone exhibited a nanohardness of 2.46 GPa and an elastic modulus of 239.4 GPa, both exceeding the corresponding values of the original grain structure. In the vortex structure, the mechanical properties exhibited a gradient distribution:the surface fine grains possess a higher nanohardness (2.04 GPa) than both columnar grains (1.59 GPa) and cellular grains (1.29 GPa). Correspondingly, the elastic modulus of these three grain categories followed the same trend as their nanohardness, with respective values of 189.6 GPa, 137.5 GPa, and 127.6 GPa. Electrochemical testing indicated the composite plate had a corrosion potential of -0.57 V and a corrosion current of 45.13×10^-6 A·cm^-2, with its corrosion resistance falling between that of the Q345R substrate and Monel400 cladding plate.

Key words： explosive welding bonding interface microstructure mechanical property corrosion resistance

Published: 25 July 2026 Online: 2026-08-12

CLC number:

TG456.6

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	Articles by authors
	LI Bing
	JIANG Shan
	WANG Gang
	WANG Fudong
	WANG Ling
	ZHANG Gang

Cite this article:

LI Bing,JIANG Shan,WANG Gang, et al. Microstructure and Properties of Monel400-Q345R Explosive Welding Composite Plate[J]. Materials Reports, 2026, 40(14): 25010132-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25010132 OR https://www.mater-rep.com/EN/Y2026/V40/I14/25010132

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