An experimental investigation of the effects of diode laser surface hardening of AISI 410 stainless steel and comparison with furnace hardening heat treatment

Moradi, Mahmoud; Arabi, Hossein; Kaplan, Alexander

doi:10.1007/s40430-019-1925-2

Cited by 7 publications

(1 citation statement)

References 26 publications

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“…In addition to arc technologies for surface modification, beam technologies, in particular laser technologies, play an important role. Depending on the requirements, laser surface treatment can be carried out without additional material [9] or with additional material in the form of powder or wire fed into the laser beam area. The advantages of laser technology in the context of cladding include high heat energy density, high precision machining with the possibility of its automation and the possibility of obtaining a very narrow heat affected zone [10].…”

Section: Introductionmentioning

confidence: 99%

Remanufacturing and surface modification in micro-areas by laser beam and microTIG methods

Połaski

Jakubowski

2020

Weld. Tech. Rev.

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Over the past years, intensive development of welding technologies that enable precise impact on the workpiece has been observed. The laser technology is the most known and commonly used tool for precise machining, both in terms of obtaining the appropriate geometry and heat distribution. This technology is now easily available, but it still has many limitations in its "basic edition". An attractive alternative in machining micro-areas can be the arc method ‒ microTIG, which is a modification of the TIG method.The work compares the effects of cladding of selected pairs of substrate materials using the microTIG method and a laser beam. The results of microscopic tests and hardness measurements of deposits made with a laser beam and the microTIG method are presented. The advantage of cladding with the microTIG method was the possibility of obtaining deposits with a lower dilution of the substrate material in the clad weld compared to laser cladding. On the other hand, clad welds produced with the laser beam had a significantly smaller amount of welding defects.

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Section: Introductionmentioning

confidence: 99%

Remanufacturing and surface modification in micro-areas by laser beam and microTIG methods

Połaski

Jakubowski

2020

Weld. Tech. Rev.

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Effects of laser process parameters on the hardness profile of AISI 4340 cylindrical samples: statistical and experimental analyses

Bensalem

Barka

Karganroudi

et al. 2022

Int J Adv Manuf Technol

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In the present paper, continuous Nd:YAG laser hardening of cylindrical AISI 4340 steel specimens was studied using experimental and statistical analyses. Three Laser parameters namely laser power, laser feed speed, and sample rotation speed were selected to evaluate their in uence on the depth of the hardened zone, and the maximum surface hardness. Mathematical models were developed as a function of these three parameters and the analysis of variance (ANOVA) was used to conduct the statistical study. Microhardness measurements revealed three distinct regions in the heat-affected zone (HAZ) of all samples. The hardened zone (Z 1 ) near the surface with the highest value of hardness, the hardness loss zone (Z 2 ) where hardness started to decrease, and the overheated zone (Z 3 ) adjacent to the core with hardness values that were less than the base metal. Based on experimental measurements, a maximum surface hardness of 60.8 HRC was attained. Furthermore, the maximum depth of the hardened zone was observed as 500 µm. The microstructures of laserhardened samples were studied using optical and scanning electron (SEM) microscopies. The hardened region seemed to have hard martensitic microstructure. By comparing the predicted and measured data for maximum microhardness values it was revealed that the models represent the experimental values with correlations close to 100%.

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Experimental investigation of laser cladding of H13 hot work steel by Stellite 6 powder

Safari

Moradi²,

Joudaki³

et al. 2022

Sādhanā

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Cladding of metals can enhance the wear behavior of metals. Many dies work at elevated temperature such as hot forging dies and hot extrusion dies needs resistance to wear at higher temperatures. In this article, the cladding of H13 hot work steel (DIN 1.2324) will be investigated by laser cladding. The Stellite 6 powders coat the steel surface by using a continuous fiber laser. Two important objects in cladding are the effect of laser process parameters on the quality of the cladding layer and the lateral overlapping percent in adjacent passes. The laser power, scanning speed, and powder feed rate are the process variables in the study. The results show that the laser power is the most influencing parameter and by increasing laser power and decreasing the scanning speed, the hardness and penetration depth of cladded powder in the substrate will be increased. The dilution factor increases by increasing the laser power and reducing scanning speed at a moderate powder feed rate. The microstructure observation shows that strong metallurgical bonding between the clad and substrate and good mixing of powder in substrate metal can be obtained by proper setting of process parameters. The micro-hardness of the cladded specimen increased 300 HV (164 % increase compared to the substrate material. Best results were obtained at 10 % overlapping between adjacent irradiation passes.

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An experimental investigation of the effects of diode laser surface hardening of AISI 410 stainless steel and comparison with furnace hardening heat treatment

Cited by 7 publications

References 26 publications

Remanufacturing and surface modification in micro-areas by laser beam and microTIG methods

Remanufacturing and surface modification in micro-areas by laser beam and microTIG methods

Effects of laser process parameters on the hardness profile of AISI 4340 cylindrical samples: statistical and experimental analyses

Experimental investigation of laser cladding of H13 hot work steel by Stellite 6 powder

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