scholarly journals Effects of TiC and rare earth on the microstructure and performance of LASER cladding Mo2FeB2

2021 ◽  
pp. 113-118
Author(s):  
Z.X. Zhang ◽  
H.F. Tian ◽  
F.L. Tantai ◽  
H. Liu ◽  
W. Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Laser Cladding ◽  
And Performance ◽  
Microstructure And Performance

PREPARATION, MICROSTRUCTURE AND PERFORMANCE OF NANOSCALE CERAMICS REINFORCED HARD COMPOSITE COATING

2014 ◽  
Vol 21 (01) ◽  
pp. 1450004 ◽  
Author(s):  
PENG LI
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Sliding Wear ◽  
Rapid Heating ◽  
Dry Sliding Wear ◽  
Nanoscale Particles ◽  
Heating And Cooling ◽  
And Performance ◽  
First Time ◽  
Microstructure And Performance

This paper is based on the dry sliding wear of Stellite SF 12- B 4 C - TiN - Mo composite coating deposited on a pure Ti using a laser cladding technique, the parameters of which provide almost crack-free composites with low porosity. To the best of our knowledge, it is the first time that Stellite SF 12- B 4 C - TiN - Mo mixed powders are deposited as the hard composites by a laser cladding technique. Scanning electron microscope images indicate that the nanoscale particles are produced in such coating. The fact that due to the sufficiently rapid heating and cooling rates of the laser cladding technique, the ceramics, such as TiC or TiB 2 did not have enough time to grow up, resulting in the formation of the nanoscale particles. Compared with a pure Ti substrate, the increments of the micro-hardness and wear resistance are obtained for such composite coating.

scholarly journals Microstructure and performance of rare earth element-strengthened plasma-facing tungsten material

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Laima Luo ◽  
Jing Shi ◽  
Jinshan Lin ◽  
Xiang Zan ◽  
Xiaoyong Zhu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
And Performance ◽  
Tungsten Material ◽  
Microstructure And Performance

Study on Technology of Multi-Trace Overlapping and Rapid Prototype by Broad-Beam Laser Cladding

2013 ◽  
Vol 750-752 ◽  
pp. 2131-2134
Author(s):  
Yi Shao Zhang ◽  
Ge Yan Fu ◽  
Fei Cao ◽  
Ji Li
Keyword(s):  
Laser Cladding ◽  
Physical Process ◽  
Rapid Prototype ◽  
Broad Beam ◽  
Beam Laser ◽  
And Performance ◽  
Microstructure And Performance

Obvious physical process differences exist between overlapping area and non-overlapping area by broad-beam laser cladding,also the parallel and vertical interface of RP.By comparing the microstructure and performance, the result shows: the microstructure of overlapping area has broken crystal,the size of overlapping area crystal is bigger than the non-overlapping one.Repeated heating makes overlapping area secondary dissolving out and having higher rigidity;Between layer and layer of broad-beam laser cladding RP is metallurgical combination completely,the degree of uniformity of central microstructures performance is good,hardness of the bow shape area between overlapping layer and matrix is greatly increased.

scholarly journals The Effect of Laser Scanning Speed on Microstructure and Performance of Cr3C2-NiCr Cermet Fabricated by in-situ Laser Cladding

2021 ◽  
pp. X
Author(s):  
Deyuan LOU ◽  
Shaokun YANG ◽  
Sheng MEI ◽  
Qing LIU ◽  
Jian CHENG ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Laser Scanning ◽  
Scanning Speed ◽  
Powder Mixtures ◽  
Laser Scanning Speed ◽  
Nickel Based Alloy ◽  
And Performance ◽  
Microstructure And Performance ◽  
Carbide Content

To explore the effect of laser scanning speed on the microstructure and performance of Cr3C2-NiCr cermet layers fabricated by in-situ laser cladding, Cr3C2-NiCr cermet layers were laser cladded from Ni/Cr/Graphite (25:65:10 wt.%) elemental powder mixtures. The microstructures of the laser cladded cermet layers and the formation mechanism were investigated. In addition, the effect of laser scanning speed on the microstructure, friction and corrosion performance of the Cr3C2-NiCr cermet layers was studied. The results indicated that the in-situ laser cladded Cr3C2-NiCr cermet layers were composed of NiCr binder and Cr3C2. The laser scanning speed had a significant influence on the carbide content, composition and size. Furthermore, it affected the in-situ laser cladded cermet layer’s hardness and wear resistance. The corrosion resistance of the in-situ laser cladded cermet layer was superior to that of laser cladded nickel-based alloy and was improved with decreasing laser scanning speed.

THE EFFECT OF RARE EARTH ON THE STRUCTURE AND PERFORMANCE OF LASER CLAD COATINGS

2006 ◽  
Vol 13 (04) ◽  
pp. 509-517 ◽  
Author(s):  
RUILIANG BAO ◽  
HUIJUN YU ◽  
CHUANZHONG CHEN ◽  
QING DONG
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Rare Earth ◽  
Laser Cladding ◽  
Phase Structure ◽  
Wear Resistant Coating ◽  
Preliminary Discussion ◽  
Effect Mechanism ◽  
And Performance ◽  
Development Tendency

Laser cladding is one kind of advanced surface modification technology and has the abroad prospect in making the wear-resistant coating on metal substrates. However, the application of laser cladding technology does not achieve the people's expectation in the practical production because of many defects such as cracks, pores and so on. The addiction of rare earth can effectively reduce the number of cracks in the clad coating and enhance the coating wear-resistance. In the paper, the effects of rare earth on metallurgical quality, microstructure, phase structure and wear-resistance are analyzed in turns. The preliminary discussion is also carried out on the effect mechanism of rare earth. At last, the development tendency of rare earth in the laser cladding has been briefly elaborated.

Microstructure and Performance of Laser Cladding Fe-Based Alloy on Cr12MoV Steel

Applied laser ◽  
2013 ◽  
Vol 33 (1) ◽  
pp. 14-17
Author(s):  
楼程华 Lou Chenghua ◽  
路远航 Lu Yuanhang ◽  
骆芳 Luo Fang ◽  
董刚 Dong Gang ◽  
姚建华 Yao Jianhua
Keyword(s):  
Laser Cladding ◽  
And Performance ◽  
Microstructure And Performance

Comparative Study on Microstructure and Performance of WC/SS316L Composite Coatings Prepared by Supersonic Laser Deposition and Laser Cladding

2016 ◽  
Vol 43 (11) ◽  
pp. 1102002
Author(s):  
李鹏辉 Li Penghui ◽  
李 波 Li Bo ◽  
张群莉 Zhang Qunli ◽  
杨理京 Yang Lijing ◽  
李祉宏 Li Zhihong ◽  
...  
Keyword(s):  
Comparative Study ◽  
Laser Cladding ◽  
Composite Coatings ◽  
Laser Deposition ◽  
Supersonic Laser Deposition ◽  
And Performance ◽  
Microstructure And Performance

Study on the Effect of Rare Earth Elements on the Microstructure and Performance of Cladding Layer

2014 ◽  
Vol 608-609 ◽  
pp. 1035-1038 ◽  
Author(s):  
Yan Cui
Keyword(s):  
Rare Earth ◽  
Grain Boundary ◽  
Rare Earth Elements ◽  
Nucleation Rate ◽  
Electric Arc ◽  
Cladding Layer ◽  
Arc Power ◽  
And Performance ◽  
Cracking Tendency ◽  
Microstructure And Performance

Rare earth elements are able to improve the tenacity of materials and the nucleation rate of alloys in crystallization. Meanwhile, it can make the grain boundary purified and improve the strong tenacity of the interface. Therefore, the reduction of cladding layer’s tearing tendency and the increase of cladding layer’s strong tenacity were realized by adding rare earth elements in this paper. The result of the experiment showed that rare earth elements could be added into the cladding layer under the technological conditions of strictly controlling arc power density and shortening the retention of cladding materials in electric arc, and also could make grains refined and play a role in reducing the cracking tendency

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