Effects of thermochemical treatments on properties of maraging steels

Cajner, Franjo; Landek, Darko; Šolić, Sanja; Cajner, Hrvoje

doi:10.1179/174329406x150486

Cited by 8 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…with conformal channels. The steel acquires high hardness at the level of up to 52 HRC and competitive strength as compared to the standard material used for building injection and casting moulds [7]. In the analysis of the selected roughness parameters, it has been found that the higher from the base plate, the higher are the values of the parameters under consideration, from 32% to 85% for Ra and from 59% to 85% for Rz in comparison of the plate bottom to its top.…”

Section: Methodology Of Investigationmentioning

confidence: 99%

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

2017

View full text Add to dashboard Cite

Abstract. The paper presents the possibilities of 3D printing of chosen hot working tool steel for manufacturing ready made parts. Results of examination of the surface topography of material manufactured by the technology Laser CUSING®B (Laser melting with metals) on the machine, Concept Laser M1 3D printing of metal parts has the potential to revolutionize the market of manufacturing and supplying parts. It makes it possible to dissipate manufacturing and to produce parts on request at lower cost and less energy consumption. The parameters of the surface topography of the hot working tool steel directly after printing can differ depending on the distance from the base plate. The differences of surface roughness values can amount from 32% to 85% for Ra and from 59% to 85% for Rz in comparison of the sample bottom to its top.

show abstract

Section: Methodology Of Investigationmentioning

confidence: 99%

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

2017

View full text Add to dashboard Cite

show abstract

“…Boron solubility in iron is very low and, according to Fe-B phase diagram [3], iron forms with boron two types of borides -FeB (16.25 wt.%) and Fe2B (8.48 wt.%), presence of which provides high hardness and wear resistance. Thermochemical boronising of metals has been extensively studied for various types of alloys, including maraging steels [4]. Laser boronising of steels and other alloys has not been studied so widely.…”

Section: Introductionmentioning

confidence: 99%

“…Maraging steels, having excellent weldability and high resistance to thermal fatigue due to the lack of carbon, has showed good suitability for SLM [1]. However, owing to the limited hardness and wear resistance, maraging steels has limited application at the harsh wear conditions [4]. In this study, the possibility to improve the surface characteristics of DIN 1.2709 steel SLM parts by application of laser alloying technology is evaluated.…”

mentioning

confidence: 99%

Surface laser processing of maraging steel parts manufactured by selective laser melting: effect on pass geometry and hardness

Bučelis

Škamat

Černašėjus

2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Due to the possibility to produce the parts with complex internal and external geometries, selective laser melting (SLM) process attracts growing interest in various fields of engineering segments such as aircraft, aerospace, biomedical, automotive, marine industries and tooling. Maraging steels, having excellent weldability and high resistance to thermal fatigue due to the lack of carbon, has showed good suitability for SLM [1]. However, owing to the limited hardness and wear resistance, maraging steels has limited application at the harsh wear conditions [4]. In this study, the possibility to improve the surface characteristics of DIN 1.2709 steel SLM parts by application of laser alloying technology is evaluated. The surface of SLM part was laser processed at various laser spot diameters and varying laser scanning speeds from 500 to 1500 mm⋅min-1, with and without preposition of alloying element. The power density was provided in the range from ~0.8⋅103 W⋅cm-2 to ~51⋅103 W⋅cm-2 and heat input – from 4 to 12 J⋅mm-1. The effect of laser processing parameters and presence of alloying element on the geometry of obtained processed passes and hardness of surface was evaluated. It was determined, that the application of CO2 continuous laser at the parameters of 1 kW laser power, 0.5 mm laser beam spot diameter and laser scanning speed in the range between 500 mm⋅min-1 and 1250 mm⋅min-1 allows obtaining laser pool of acceptable geometry and sizes directly on as-manufactured SLM part surface without any pre-processing. The increasing scanning speed to 1500 mm⋅min-1 or spot size to 2.0 and 3.0 mm results in too small pool depth and unstable pool geometry. The laser processing with preposition of alloying element layer provided surface alloying effect of the maraging steel SLM part. The hardness of processed surface areas ranged between ~600 HV0.2 at the lowest scanning speed and ~1770 HV0.2 at the highest speed, what is from 18% to ~3.5 times higher, as compared with maximum hardness of 1.2709 maraging steel after aging (~58 HRC or ~510 HV).

show abstract

“…It is well known that nitriding can substantially increase the life span of conventionally processed tool inserts from maraging steel 41 , 42 . The positive effect of nitriding has also been reported for AM stainless steel 316L 43 .…”

Section: Introductionmentioning

confidence: 99%

Use of plasma nitriding to improve the wear and corrosion resistance of 18Ni-300 maraging steel manufactured by selective laser melting

Godec

Podgornik

Kocijan

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Abstract18Ni-300 maraging steel manufactured by selective laser melting was plasma nitrided to improve its wear and corrosion resistance. The effects of a prior solution treatment, aging and the combination of both on the microstructure and the properties after nitriding were investigated. The results were compared with conventionally produced 18Ni-300 counterparts subjected to the same heat- and thermo-chemical treatments. The plasma nitriding was performed under the same conditions (temperature of 520 °C and time of 6 h) as the aging in order to investigate whether the nitriding and the aging could be carried out simultaneously in a single step. The aim of this work was to provide a better understanding of the morphology and chemical composition of the nitrided layer in the additive-manufactured maraging steel as a function of the prior heat treatments and to compare the wear and corrosion resistance with those of conventional maraging steel. The results show that nitriding without any prior aging leads to cracks in the compound layer, while nitriding of the prior-heat-treated additive-manufactured maraging steel leads to benefits from the thermochemical treatment in terms of wear and corrosion resistance. Some explanations for the origins of the cracks and pores in the nitride layers are provided.

show abstract

Effects of thermochemical treatments on properties of maraging steels

Cited by 8 publications

References 3 publications

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

Surface laser processing of maraging steel parts manufactured by selective laser melting: effect on pass geometry and hardness

Use of plasma nitriding to improve the wear and corrosion resistance of 18Ni-300 maraging steel manufactured by selective laser melting

Contact Info

Product

Resources

About