Microstructure of Ni–NiCr laminated composite and Cr18–Ni8 steel joint by vacuum brazing

Wu, Na; Li, Yajiang; Wang, Juan

doi:10.1016/j.vacuum.2012.05.027

Cited by 17 publications

(5 citation statements)

References 9 publications

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“…Hence, while heating to 980°C and above, the RAFM steel completely transforms to single-phase austenite and converts to fresh martensite on cooling. No precipitation of intermetallic compounds is observed near the austenitic SS interface for either of the joints as reported by other researchers [18,19].…”

Section: Resultssupporting

confidence: 87%

Effect of brazing temperature on the microstructure of martensitic–austenitic steel joints

Chakraborty

Chaurasia

Murugesan

et al. 2017

Materials Science and Technology

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Dissimilar joining of reduced activation ferritic–martensitic steel to AISI 316LN austenitic stainless steel is carried out by brazing in inert atmosphere at three different temperatures, i.e. 980, 1020 and 1040°C using AWS BNi-2 powder. The braze joints are characterised by scanning electron microscopy, X-ray diffraction, micro-hardness measurement. With increasing brazing temperature from 980 to 1040°C, the approximate width of the braze layer decreases from 350 to 80 µm and hardness reduces from 600 to 410 VHN. However, not much difference is found in microstructure and hardness between braze joints produced at 1020 and 1040°C. With increasing brazing temperature, morphology and volume fraction of intermetallics formed in the braze layer change, thereby reducing the hardness variation between the braze layer and the base metal.

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Section: Resultssupporting

confidence: 87%

Effect of brazing temperature on the microstructure of martensitic–austenitic steel joints

Chakraborty

Chaurasia

Murugesan

et al. 2017

Materials Science and Technology

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“…The fine granules were rich in Cr and Fe elements and their microhardness reached HV900. The fine granules could be (Fe, Cr)B precipitates [17]. So, the third zone should belong to the diffusion affected zone.…”

Section: Resultsmentioning

confidence: 99%

Effects of CTCP Modification on Microstructure and Wear Behavior of CTCP-NiCrBSi/Heat Resistant Steel Composite Layer

Zhang

Hou

2018

Materials

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A CTCP-NiCrBSi/heat resistant steel composite layer was designed and fabricated by vacuum fusion sintering. The structure of the composite layer was similar to reinforced concrete. Numerous reinforced regions with a cylindrical shape were evenly distributed in the heat resistant steel. Modified cast tungsten carbide particles (CTCP) reinforced NiCrBSi matrix composite constituted the reinforced region (CTCP-NiCrBSi). The microstructure of the composite layers was investigated by scanning electron microscope (SEM), energy dispersive x-ray spectrometer (EDS), and image analysis. The wear behavior of the composite layer was estimated on the ring-on-disc rig at a temperature range of room temperature (RT) to 800 °C in air. The microstructure and wear behavior of the composite layer with modified CTCP were compared with those with primary CTCP. The results showed that the poor chemical resistance of W2C and the interdiffusion of elements were responsible for the dissolution of unmodified CTCP in the molten NiCrBSi alloy. A WC outer shell formed on the surface of the CTCP after surface carburizing modification. The WC outer shell could effectively resist the dissolution of CTCP in NiCrBSi during the sintering process. The content of WC/W2C in modified CTCP-NiCrBSi increased by about 12.0 vol. % when compared with that in the primary CTCP-NiCrBSi. The wear rate of the composite layer with modified CTCP was lower than that with primary CTCP between RT and 700 °C. The wear rates of the composite layer decreased with increasing temperature from RT to 700 °C and increased above 700 °C.

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“…There is interest in combining Ni-20Cr with stainless steel alloys because of the superior high temperature strength and corrosion-resistance in aqueous environments of Ni-20Cr [15,16] and its slightly lower density compared to stainless steel (7.75 g/cm 3 for Ni-20Cr and 8 g/cm 3 for SS304L). An FGM of these two materials would reduce the overall component weight compared to a monolithic SS304L component, while maintaining the critical corrosion resistant properties of a monolithic SS304L component [17]. Additionally, there is an interest in using Ni-20Cr as an intermediate layer between stainless steel and titanium alloys to enable joining of stainless steel and titanium alloys without the formation of intermetallic phases in the direct joining of these two terminal alloys [2,18].…”

Section: Niendorf Et Al Examined the Effect Of Changing Processing Pa...mentioning

confidence: 99%

Tensile behavior of stainless steel 304L to Ni-20Cr functionally graded material: Experimental characterization and computational simulations

et al. 2021

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Microstructure of Ni–NiCr laminated composite and Cr18–Ni8 steel joint by vacuum brazing

Cited by 17 publications

References 9 publications

Effect of brazing temperature on the microstructure of martensitic–austenitic steel joints

Effect of brazing temperature on the microstructure of martensitic–austenitic steel joints

Effects of CTCP Modification on Microstructure and Wear Behavior of CTCP-NiCrBSi/Heat Resistant Steel Composite Layer

Tensile behavior of stainless steel 304L to Ni-20Cr functionally graded material: Experimental characterization and computational simulations

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