Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Idriss, A. N. Md; Mridha, S.; Baker, T. N.

doi:10.1179/1743284714y.0000000547

Cited by 7 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present paper describes the variation in surface topography, melt feature, dilution and defect of the coating layers processed using these methods. Part II 28 will describe the hardness and related microstructure developed by the two surface engineering techniques.…”

Section: Introductionmentioning

confidence: 99%

Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Idriss

Mridha

Baker

2014

Materials Science and Technology

View full text Add to dashboard Cite

A comparison of a coating of Fe–Cr–B alloy powder processed on a plain carbon steel by surface melting using either laser or gas tungsten arc welding (GTAW) torch was made. The alloy powder was injected in laser melted surface, while the preplaced powder was melted using the GTAW technique. The topography of the GTAW tracks showed a relatively smooth surface, but the laser track surface was very rough. Because of high energy input, the GTAW method produced very wide and deep tracks with a high dilution compared to those of the laser tracks. Pores and fine cracks were seen in laser tracks; the cracks were elongated across the track width, and some of them propagated down to the melt depth. The GTAW track produced at a low energy was free from any cracking, but a centreline crack was present when processed at a high energy input.

show abstract

Section: Introductionmentioning

confidence: 99%

Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Idriss

Mridha

Baker

2014

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…Ascending from the bottom of the molten pool, with the simultaneous increase of the R and the decrease of the G, the dendrites in the middle area were formed. As the distance increased from the middle to top of the molten pool, the G reached the lowest value and the R reached the highest, leading to the fine equiaxed crystal formation at the top area [23]. In the melted layer, the developed coarse columnar dendrite seriously affected the comprehensive mechanical properties of the melted layer.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical properties of Cr12MoV by ultrasonic vibration-assisted laser surface melting

Zhou

Huang

et al. 2017

Materials Science and Technology

View full text Add to dashboard Cite

The effects of laser surface melting assisted by ultrasonic vibration on the microstructure and mechanical properties of Cr12MoV were investigated. Results indicated that the original coarse columnar dendrite can be converted into a fine dendritic and equiaxed. The average microhardness increase from 389HV0.2 to 427HV0.2 resulted from the effect of grain refinement. The friction coefficient was lower than the melted layer without ultrasonic vibration and substrate. Under the same experimental conditions, the width and depth of wear scar were decreased by 19% and 25% than that of without ultrasonic vibration, respectively. The wear mechanism from severe adhesive wear into slight abrasive wear under the action of ultrasonic vibration. Experimental results revealed that melted layer fabricated by ultrasonic vibration exhibit finer and more uniform microstructure as well as superior tribological properties.

show abstract

“…Laser modification is also used for this purpose [ 16 , 17 , 18 ]. One of the currently popular techniques is laser heat treatment [ 6 , 8 , 9 ], where the base material is alloyed with metals or nonmetals, including carbon [ 19 ], boron [ 20 , 21 , 22 ], chromium [ 23 ], silicon [ 23 , 24 , 25 ], molybdenum [ 26 ], carbides [ 27 , 28 ], borides [ 27 ] or mixtures of various elements [ 25 , 26 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. As a result of the laser alloying process, the chemical composition and microstructure are changed, hence changing the properties of the processed material.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Bartkowska¹

2021

Materials

View full text Add to dashboard Cite

The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

show abstract

Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Cited by 7 publications

References 29 publications

Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Laser and GTAW torch processing of Fe–Cr–B coatings on steel

Microstructure and mechanical properties of Cr12MoV by ultrasonic vibration-assisted laser surface melting

Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Contact Info

Product

Resources

About