High temperature wear resistance of laser cladding NiCrBSi and NiCrBSi/WC-Ni composite coatings

H13 steel is prone to insufficient high temperature wear resistance due to thermal wear under high temperature conditions. To improve high temperature wear resistance of H13 steel, the maraging steel coating with low-nickel was successfully prepared owing to excellent thermal stability. Sliding wear tests at 400, 500 and 600 °C were carried out for the laser cladding coating and H13 steel to comparatively investigate their high temperature wear performance and mechanism. The microstructure, phases, hardness and thermal stability of the maraging steel coating were also studied. The results showed that the maraging steel coating possessed excellent high temperature wear resistance and effectively improved the high temperature wear resistance of H13 steel by laser cladding. The superior thermal stability of maraging steel played an important role in improving its high temperature wear resistance.

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Research on High-Temperature Wear Resistance of Laser Cladding Co-Based WC Composite Coating on Hot-Forging Die

Applied laser ◽

10.3788/al20133304.0370 ◽

2013 ◽

Vol 33 (4) ◽

pp. 370-375

Author(s):

徐卫仙 Xu Weixian ◽

张群莉 Zhang Qunli ◽

姚建华 Yao Jianhua

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Composite Coating ◽

Laser Cladding ◽

Hot Forging ◽

High Temperature Wear ◽

Hot Forging Die ◽

Forging Die

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Research on High-Temperature Wear Resistance of Laser Cladding Co-Based WC Composite Coating on Hot-Forging Die

Applied laser ◽

10.3788/al20133304.370 ◽

2013 ◽

Vol 33 (4) ◽

pp. 370-375

Author(s):

徐卫仙 Xu Weixian ◽

张群莉 Zhang Qunli ◽

姚建华 Yao Jianhua

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Composite Coating ◽

Laser Cladding ◽

Hot Forging ◽

High Temperature Wear ◽

Hot Forging Die ◽

Forging Die

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Phase Transformation-Induced Improvement in Hardness and High-Temperature Wear Resistance of Plasma-Sprayed and Remelted NiCrBSi/WC Coatings

Metals ◽

10.3390/met10121688 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1688

Author(s):

Jin Sha ◽

Liang-Yu Chen ◽

Yi-Tong Liu ◽

Zeng-Jian Yao ◽

Sheng Lu ◽

...

Keyword(s):

Wear Resistance ◽

High Temperature ◽

Composite Coating ◽

Composite Coatings ◽

Hardness Test ◽

Wear Volume ◽

Dispersion Strengthening ◽

High Temperature Wear ◽

Nicrbsi Coating ◽

Plasma Sprayed

The remelting method is introduced to improve the properties of the as-sprayed NiCrBSi coatings. In this work, tungsten carbide (WC) was selected as reinforcement and the as-sprayed and remelted NiCrBSi/WC composite coatings were investigated by X-ray diffraction, scanning electron microscopy, hardness test and tribology test. After spraying, WC particles are evenly distributed in the coating. The remelting process induced the decarburizing reaction of WC, resulting in the formation of dispersed W2C. The dispersed W2C particles play an important role in the dispersion strengthening. Meanwhile, the pores and lamellar structures are eliminated in the remelted NiCrBSi/WC composite coating. Due to these two advantages, the hardness and the high-temperature wear resistance of the remelted NiCrBSi/WC composite coating are significantly improved compared with those with an as-sprayed NiCrBSi coating; the as-sprayed NiCrBSi coating, as-sprayed NiCrBSi/WC composite coating and remelted NiCrBSi/WC composite coating have average hardness of 673.82, 785.14, 1061.23 HV, and their friction coefficients are 0.3418, 0.3261, 0.2431, respectively. The wear volume of the remelted NiCrBSi/WC composite coating is only one-third of that of the as-sprayed NiCrBSi coating.

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