Effect of a small addition of Ti on the Fe-based coating by laser cladding

Gao, Wenyan; Zhang, Zhiyan; Zhao, Shusen; Wang, Yibo; Chen, Han; Xin, Lin

doi:10.1016/j.surfcoat.2016.03.015

Cited by 53 publications

(22 citation statements)

References 34 publications

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“…Iron-nickel alloy is characterized by appreciable high-temperature creeping resistance and corrosion resistance. Both elements, iron and nickel, are titanium-b stabilizers which means that increase in their content impacts on decrease of allotropy transformation temperature (Ti-a = > Ti-b) so there is possibility of titanium-b occurrence at room temperature [1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…In most cases there is also inert gas injection in area of molten pool existence in order to prevent it contact with air which components could contaminate the welding run. Proper selection of laser surface treatment technological parameters, such as: velocity of laser beam and its power, as well as amount of additional material and protective gas, lead to formation of uniform, porous-free surface layers characterized by different properties in comparison to the base material [1,2,10,11,16,18,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Laser heat treatment of titanium GRADE 1 with iron‐nickel powder

Wiśniowski

Tański

Janicki

2019

Materialwissenschaft Werkst

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Titanium alloys thanks to their low density and high mechanical properties are a group of materials that are being used willingly nowadays. A promising method of titanium heat treatment is laser alloying. Process parameters like laser beam power, its traverse speed, amount of alloying elements and shield gas, have influence on the resulting material. Different chemical composition and morphology can be achieved resulting in a change of properties on the surface of the material. The paper presents the investigation of titanium GRADE 1 processed with iron‐nickel powder using laser alloying. The treatment was performed using a high power diode laser. Different laser beam power values were used. Treatment resulted in obtaining good‐adhere, porous‐free, uniform composite material with no cracks. Formation of new phases and solid solution was the reason why it was possible to achieve an increase in microhardness on the surface. Light microscopy, scanning electron microscopy with energy dispersive X‐ray spectroscopy examination, microhardness results and X‐ray diffraction are presented within the paper.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser heat treatment of titanium GRADE 1 with iron‐nickel powder

Wiśniowski

Tański

Janicki

2019

Materialwissenschaft Werkst

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“…The results have shown that the V additions contributed to a reduction in the grain size and an increase in the yield strength of the TWIP steels. Effects of different addition of Cr on TiC-VC reinforced Fe-based laser cladding coatings were also investigated by Zhang et al [26]. The study revealed that the TiC-VC reinforced Fe-based laser cladding coatings with different addition of Cr were composed of α-Fe, γ-Fe, TiC, VC and TiVC 2 , the cladding layer with 3.0% Cr showed the highest microhardness 1090HV 0.2 and the cladding layer with 12.0% Cr addition showed the best corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Effects of V and Cr on Laser Cladded Fe-Based Coatings

Wang

Zhang

et al. 2018

Coatings

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Fe-based coatings with high V and Cr content were obtained by laser cladding using Fe-based powder with different Cr 3 C 2 and FeV 50 content. The results showed that Fe-based coatings were uniform and dense. The constituent phases were mainly composed of α-Fe solid solution with the increase of Cr 3 C 2 and FeV 50 , γ-Fe and V 8 C 7 phases were achieved. The microstructure of the coatings exhibited a typical dendrite structure. The concentration of C, V and Cr were saturated in dendritic areas, and the other alloying elements were mainly dissolved in the interdendritic areas. The hardness and wear resistance of Fe-based coatings were enhanced with the Cr 3 C 2 and FeV 50 addition. The specimen with 15% Cr 3 C 2 and 16% FeV50 had the highest hardness of 66.1 ± 0.6 HRC, which was 1.05 times higher than the sample with 4.5% Cr 3 C 2 and 5% FeV 50 , and the wear resistance of the former was three times greater than the latter.

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“…Considerable research has been carried out to solve the cracking problem in laser cladding coatings [1,10,11,12,13,14]. It was reported that the cracking susceptibility can be decreased by reducing the thermal stresses in the coating via preheating and controlling cooling or by increasing the ductility of the coating through adding alloying elements to modify their phase constitution and microstructures.…”

Section: Introductionmentioning

confidence: 99%

“…Gao et al show that the addition of Ti into Fe-based alloy powder changes the morphology and microstructure of the coatings obviously. With the increase of Ti content, the dilution rate of the coatings goes up and the size of crystal phase in the deposits becomes larger, which makes the hardness of high-doped layers decrease sharply [13]. However, addition of Ta in a NiCrBSi alloy laser clad composite coating led to the in situ formation of fine TaC particles.…”

Section: Introductionmentioning

confidence: 99%

Crack Restraining Methods and their Effects on the Microstructures and Properties of Laser Cladded WC/Fe Coatings

2018

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Laser cladded WC/Fe coatings have the advantages of low cost and high abrasion wear resistance. However, cracks always appear in WC/Fe coatings, which limits their industrial application. In this paper, the co-effects of the re-melting process, heat treatments, and amount of Co element on the cracking susceptibility, microstructures, and mechanical properties of WC/Fe laser cladding coatings were studied. Experimental results show that re-melting process is helpful to improve the surface quality of the coating and to reduce the cracking susceptibility. The hardness of the coating decreases slightly but distributes more uniformly. Cracks in the coating can be inhibited effectively by preheating the substrate to 250 °C and maintaining the temperature during the laser cladding process, as well as applying an annealing treatment at 300 °C for 1 h. Heat treatment also results in a slight decrease in the hardness. Crack initiation cannot be restrained completely by applying the above two methods when laser cladding a big area of coating. On the basis of the above two methods, addition of Co element to the coating can further improve its toughness and decrease the crack susceptibility. Crack-free WC/Fe coating can be manufactured when 8% Co is added, and its wear resistance is much better than that of the hardened medium steel, especially when the wear time is long.

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Effect of a small addition of Ti on the Fe-based coating by laser cladding

Cited by 53 publications

References 34 publications

Laser heat treatment of titanium GRADE 1 with iron‐nickel powder

Laser heat treatment of titanium GRADE 1 with iron‐nickel powder

Effects of V and Cr on Laser Cladded Fe-Based Coatings

Crack Restraining Methods and their Effects on the Microstructures and Properties of Laser Cladded WC/Fe Coatings

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