Effect of short-term tempering on microstructure and mechanical properties of high-strength FeCrMoVC

Hufenbach, J.; Giebeler, Lars; Hoffmann, Markus M.; Kohlar, S.; Kühn, U.; Gemming, Thomas; Oswald, Steffen; Eigenmann, Bernd; Eckert, J.

doi:10.1016/j.actamat.2012.04.041

Cited by 35 publications

(30 citation statements)

References 36 publications

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“…Additionally, carbides of the structure types Mo 2 C and VC are detected. Table 3 summarizes the results of the Rietveld analysis compared with the results of the as-cast state as presented in [14].…”

Section: Resultsmentioning

confidence: 99%

“…effect of the SLM process is clearly reflected in the microstructure. The cooling rate obtained during the SLM process is calculated to reach up to 10 5 K s −1 [23], while the cooling rate in the casting process is about 10-70 K s −1 [14]. The increased cooling rate leads to a significantly finer microstructure and homogeneously dispersed alloying elements in the SLM parts.…”

Section: Resultsmentioning

confidence: 99%

“…4c) shows a significantly coarser carbide network compared to the SLM samples. A dark network of carbides (Mo 2 C and VC type [14]) is recognized which is surrounded by a matrix consisting of retained austenite and martensite [14].…”

Section: Resultsmentioning

confidence: 99%

“…With the help of this method, a microstructure composed of martensite, retained austenite and a complex network of special carbides forms already in the ascast state [15]. The combination of phases and material morphology result in a high hardness of almost 743 ± 12 HV 0.1 as well as a high ultimate engineering compression strength of about 3500 MPa combined with a fracture strain of 17% [14]. Thus, the hardness and strength of the as-cast alloy are similar or significantly higher than the values of commercial heat-treated tool steel [12].…”

Section: Introductionmentioning

confidence: 98%

“…The investigated Fe85Cr4Mo8V2C1 tool steel is generally prepared by induction melting by applying enhanced solidification and cooling rates as well as pure preparation conditions [13,14]. With the help of this method, a microstructure composed of martensite, retained austenite and a complex network of special carbides forms already in the ascast state [15].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and properties of FeCrMoVC tool steel produced by selective laser melting

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Recent toolmaking faces a growing variety of challenges. Innovative solutions in material development and process technology are required. The application of high-strength and wear-resistant materials and composites in industrial production results in constantly increasing demands on the quality of tools and their performance. Furthermore, tools and moulds must withstand permanent use and superimposed loadings. A high strength, an adequate toughness as well as resistance against wear and corrosion of the applied materials are demanded in the processing of e.g., polymers and composites. Here, polymers with very hard fillers like corundum lead to aggressively abrasive wear conditions for the tools. [1,2] Additionally, the tools have to sustain a corrosive attack due to acids (e.g., hydrochloric and sulfuric acid) deriving from polymerisation and thermal degradation of the polymers. [2,3] Thus, corrosion-resistant cold-work steels (e.g., X90CrMoV18 containing 18% Cr) are primarily applied. Alloy designs in order to meet the rising requirements for tools in plastics processing were studied by e.g., Huth et al. [2,4] based on the attempts to produce corrosion-and wearresistant multiphase steels (e.g., X190CrVMo20-4 as well as X140CrNbMo12-10-2) by powder metallurgy (PM). PM steel tools can partly achieve longer service lives than conventionally produced tool steels, because of the enabled addition of a high number of alloying elements like C, Cr, Nb, V to build a lot of very hard (mono)carbides. However, their production is expensive and complex, and their repair and maintenance by e.g., deposition welding is extremely challenging due to the very high carbide content and enclosed production-related gases in the PM steels. [5] A near-net-shape tool production by casting provides an economical alternative to the mentioned timeconsuming and expensive PM manufacturing. Furthermore, by tailored alloy designs as well as targeted solidification and cooling processes, specific microstructures can be adjusted already in the as cast state without any additional forming and heat treatment procedure. Thus, mechanical post-processing can be minimized and subsequent heat treatment is reduced.A targeted alloy design and process optimization for the production of high-strength cast tools are presented in studies of Hufenbach et al. [6][7][8] The tailored casting technology implies high solidification rates ≥ 10 K s À1 by using a copper mould. [9] No additional heat treatment is required to produce castings with

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Fatigue crack propagation and in-situ observations in three tool steel alloys manufactured using a rapid solidification technique

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Effect of short-term tempering on microstructure and mechanical properties of high-strength FeCrMoVC

Cited by 35 publications

References 36 publications

Microstructure and properties of FeCrMoVC tool steel produced by selective laser melting

Microstructure and properties of FeCrMoVC tool steel produced by selective laser melting

Novel Corrosion‐Resistant Tool Steels with Superior Wear Properties

Fatigue crack propagation and in-situ observations in three tool steel alloys manufactured using a rapid solidification technique

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