Effect of Element Addition Method on Formability and Microstructure of Laser Cladding Deposited Ti-25V-15Cr Alloy

HU Teng-teng, ZHANG Feng-ying, QIU Ying, WANG Kun, WANG Gang, YANG Er-kai

Surface Technology ›› 2019, Vol. 48 ›› Issue (5) : 116-122.

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Surface Technology ›› 2019, Vol. 48 ›› Issue (5) : 116-122. DOI: 10.16490/j.cnki.issn.1001-3660.2019.05.018
Special Topic—Laser Composite Manufacturing and Surface Modification

Effect of Element Addition Method on Formability and Microstructure of Laser Cladding Deposited Ti-25V-15Cr Alloy

  • HU Teng-teng, ZHANG Feng-ying, QIU Ying, WANG Kun, WANG Gang, YANG Er-kai
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Abstract

The work aims to investigate the effect of the addition method of elemental powders V and Cr on the microstructure and formability of laser cladding deposited Ti-25V-15Cr alloy with Ti-25V-15Cr alloy as research subject. The deposition experiments were performed from three kinds of powder feedstock, including bonded coated Ti(150 mm)+V(15 mm)+Cr(15 mm), directly mixed Ti(150 mm)+V(15 mm)+Cr(15 mm) and directly mixed Ti(150 mm)+V(100 mm)+Cr(150 mm), and the height, width and microstructure of the deposited samples were analyzed. Deposited efficiency of the samples from the bonded coated Ti (150 mm)+V(15 mm)+Cr(15 mm) and directly mixed Ti(150 mm)+V(100 mm)+Cr(150 mm) were much higher than that from the directly mixed Ti(150 mm)+V(15 mm)+Cr(15 mm). The microstructure of the deposited samples from Ti(150 mm)+V(15 mm)+Cr(15 mm) and from directly mixed Ti(150 mm)+V(100 mm)+Cr(150 mm) were mainly composed of fine equiaxed grains and near-equiaxed grains, while that from the directly mixed Ti(150 mm)+V(15 mm)+Cr(15 mm) consisted of epitaxially columnar grains. When the bonded coated Ti (150 μm) + V (15 μm) + Cr (15 μm) is used as the deposited material, the grain size can be refined to some extent while the deposition efficiency can be improved. This method has a significant influence on the formability, composition uniformity and microstructure of the laser cladding deposited samples.

Key words

laser cladding deposition; Ti-25V-15Cr; bond coating method; microstructure, formability; deposition efficiencyt

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HU Teng-teng, ZHANG Feng-ying, QIU Ying, WANG Kun, WANG Gang, YANG Er-kai. Effect of Element Addition Method on Formability and Microstructure of Laser Cladding Deposited Ti-25V-15Cr Alloy[J]. Surface Technology. 2019, 48(5): 116-122

Funding

Supported by the National Key Research and Development Program of China (2016YFB0700301), Fundamental Research Funds for the Central Universities (300102319208, 300102319301), National Training Program of Innovation and Entrepreneurship for Undergraduates (201810710119)
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