Corrosion Characteristics of Ni-Based Hardfacing Alloy Deposited on Stainless Steel Substrate by Laser Cladding

2017 ◽  
Vol 48 (6) ◽  
pp. 2915-2926 ◽  
Author(s):  
Reena Awasthi ◽  
Geogy Abraham ◽  
Santosh Kumar ◽  
Kaustava Bhattacharyya ◽  
Nachiket Keskar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Hardfacing Alloy

Wear Characteristics of Ni-Based Hardfacing Alloy Deposited on Stainless Steel Substrate by Laser Cladding

2015 ◽  
Vol 46 (3) ◽  
pp. 1237-1252 ◽  
Author(s):  
Reena Awasthi ◽  
P. K. Limaye ◽  
Santosh Kumar ◽  
Ram P. Kushwaha ◽  
C. S. Viswanadham ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Wear Characteristics ◽  
Hardfacing Alloy

Evaluation of Two Different Energy Inputs for Deposition of Stellite 6 by Laser Cladding on a Martensitic Stainless Steel Substrate

2015 ◽  
Vol 1119 ◽  
pp. 628-632
Author(s):  
Alain Kusmoko ◽  
Druce Dunne ◽  
Hui Jun Li
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Martensitic Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Testing Machine ◽  
Wear Testing ◽  
Chemical Compositions ◽  
Stellite 6 ◽  
Energy Inputs

Stellite 6 was deposited by laser cladding on a martensitic stainless steel substrate with energy inputs of 1 kW (MSS-1) and 1.8 kW (MSS-1.8). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was assessed using a pin-on-plate (reciprocating) wear testing machine. The results showed less cracking and pore development for Stellite 6 coatings applied to the MSS steel substrate with the lower heat input (MSS-1). Further, the Stellite coating for MSS-1 was significantly harder than that obtained for MSS-1.8. The wear test results indicated that the weight loss for MSS-1 was much lower than for MSS-1.8. It is concluded that the lower hardness of the coating for MSS-1.8, markedly reduced the wear resistance of the Stellite 6 coating.

scholarly journals Effects of WC Particle Types on the Microstructures and Properties of WC-Reinforced Ni60 Composite Coatings Produced by Laser Cladding

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 583 ◽  
Author(s):  
Pengxian Zhang ◽  
Yibin Pang ◽  
Mingwei Yu
Keyword(s):  
Stainless Steel ◽  
Uniform Distribution ◽  
Laser Cladding ◽  
Steel Surface ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Composite Coatings ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Different Types

WC-reinforced Ni60 composite coatings with different types of WC particles were prepared on 304 stainless steel surface by laser cladding. The influences of spherical WC, shaped WC, and flocculent WC on the microstructures and properties of composite coatings were investigated. The results showed that three types of WC particles distribute differently in the cladding coatings, with spherical WC particles stacking at the bottom, shaped WC aggregating at middle and lower parts, with flocculent WC particles dispersing homogeneously. The hardnesses, wear resistances, corrosion resistances, and thermal shock resistances of the coatings are significantly improved compared with the stainless steel substrate, regardless of the type of WC that is added, and especially with regard to the microhardness of the cladding coating; the addition of spherical or shaped WC particles can be up to 2000 HV0.05 in some areas. Flocculent WC, shaped WC, and spherical WC demonstrate large to small improvements in that order. From the results mentioned above, the addition of flocculent WC can produce a cladding coating with a uniform distribution of WC that is of higher quality compared with those from spherical WC and shaped WC.

scholarly journals Wear Behaviour of Stellite 6 Coatings Produced on an Austenitic Stainless Steel Substrate by Laser Cladding Using Two Different Heat Inputs

2014 ◽  
Vol 619 ◽  
pp. 13-17 ◽  
Author(s):  
Alain Kusmoko ◽  
Druce P. Dunne ◽  
Hui Jun Li
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Laser Cladding ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Testing Machine ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Chemical Compositions ◽  
Stellite 6

Stellite 6 was deposited by laser cladding on an austenitic stainless steel substrate (ASS) with energy inputs of 1 kW (ASS 1) and 1.8 kW (ASS 1.8). The chemical compositions and microstructures of these coatings were characterized by atomic absorption spectroscopy, optical microscopy and scanning electron microscopy. The microhardness of the coatings was measured and the wear mechanism of the coatings was assessed using a pin-on-plate (reciprocating) wear testing machine. The results showed less cracking and pore development for Stellite 6 coatings applied to the austenitic stainless steel substrate with the lower heat input (ASS 1). Further, the Stellite coating for ASS 1 was significantly harder than that obtained for ASS 1.8. The wear test results showed that the weight loss for ASS 1 was much lower than for ASS 1.8. It is concluded that the lower hardness of the coating for ASS 1.8, together with the softer underlying substrate structure, markedly reduced the wear resistance of the Stellite 6 coating.

scholarly journals The Effect of Powder Composition on the Microstructure and Corrosion Resistance of Laser Cladding 60NiTi Alloy Coatings on SS 316L

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1104
Author(s):  
Zexu Du ◽  
Zhengfei Hu ◽  
Yuqiang Feng ◽  
Fan Mo
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Laser Cladding ◽  
316L Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Eutectic Structure ◽  
Nacl Solution ◽  
Powder Composition ◽  
Ni Powder

Two kinds of 60NiTi powders were prepared by pure Ni mixed with Ti powders, and 55NiTi alloy powder with pure Ni powder and both the powders were fully mixed by alcohol ball milling. Two kinds of coatings (denoted as 60Ni-40Ti and 55NiTi-5Ni) were prepared on a 316L stainless steel substrate by laser cladding. The microstructure, microhardness and electrochemical behavior of the prepared coatings were investigated extensively. The results show that 55NiTi-5Ni has a typical dendritic eutectic structure, but 60Ni-40Ti tends to form a eutectic network structure. The main phases in both coatings are (Ni, Fe)Ti and (Ni, Fe)3Ti; however, the (Ni, Fe)Ti phase is dominant in 55NiTi-5Ni, but the (Ni, Fe)3Ti phase is more prevalent in 60Ni-40Ti. The microhardness was significantly improved with the 316L stainless steel substrate, and the microhardness of 55NiTi-5Ni is slightly higher than 60Ni-40Ti. The corrosion resistance of the two coatings in 3.5 wt% NaCl solution also leads to significant improvements compared with the substrate, and the corrosion resistance of 55NiTi-5Ni was also increased. These different behaviors and characteristics might be related to the different microstructures. Uniform and fine eutectic structure in 55NiTi-5Ni coating lead to better performance, which is also conducive to the formation of the dense oxide film to improve corrosion resistance.

Microstructure and Cavitation-Erosion Mechanism of Laser Cladding NiCrSiB Coating on CrNiMo Stainless Steel

2010 ◽  
Vol 154-155 ◽  
pp. 1788-1791 ◽  
Author(s):  
Xiao Bin Zhang ◽  
Xia Chang ◽  
Tao Wei ◽  
Chang Sheng Liu
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Cavitation Erosion ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Strengthening Effect ◽  
Cladding Layer ◽  
Dense Microstructure ◽  
Micro Cracks ◽  
Precipitated Phases

A Ni-based alloy NiCrSiB laser cladding layer was made on the surface of CrNiMo stainless steel specimens using NiCrSiB powder. Cavitation erosion behavior of the laser cladding layer and the CrNiMo stainless steel was investigated by ultrasonic vibration cavitation erosion equipment The results shown that laser cladding layer has dense microstructure and has metallurgical combination with CrNiMo stainless steel substrate. Because of impact effect of cavities collapse, micro-cracks caused material broke off from samples. NiCrSiB laser cladding layer have better micro-crack propagate resistance property than CrNiMo stainless steel.Laser cladding layer has better cavitation resistance properties because of strengthening effect by precipitated phases such as M23[CB]6、CrB、CrSi、Fe2B、B4C and work hardening effect during cavitation erosion process.

A Study of Laser Cladding on the NiCr/Cr3C2-WS2-CaF2 Coating

2013 ◽  
Vol 747-748 ◽  
pp. 146-151 ◽  
Author(s):  
Shu Fa Chen ◽  
Cheng Long Feng ◽  
Jin Yang ◽  
Jin Song Chen
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Composite Coating ◽  
Laser Cladding ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Stainless Steel Substrate ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Wear Process

NiCr/Cr3C2-WS2-CaF2 mixed powders were prepared on 1Cr18Ni9Ti stainless steel substrate to fabricate high-temperature self-lubrication wear resistant composite coating by laser cladding. The microstructure of the coating was examined by means of XRD, SEM and EDS. The high-temperature dry sliding friction and wear behavior of the composite coating were evaluated by using a ball-on-block wear tester at room temperature, 300 and 600 , respectively. The results showed that the composite coating had a unique microstructure consisting of γ-(Ni,Fe) solid solution matrix, Cr7C3/WC reinforcement and CrS/WS2 lubricant particles. The hardness of NiCr/Cr3C2-WS2-CaF2 coating by laser cladding was lower than NiCr/Cr3C2 coating, but higher than stainless steel substrate significantly. It was because of the addition of solid lubricant. In the wear process, elevated temperature was helpful to form a lubricating transfer film. As a result, the NiCr/Cr3C2-WS2-CaF2 coating exhibited a notable anti-friction and wear resistance at 300 and 600 .

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