Improved the microstructures and properties of M3:2 high-speed steel by spray forming and niobium alloying

Lü, Lin; Hou, Longgang; Zhang, J.X.; Wang, H.B.; Cui, Hua; Huang, Jinfeng; Zhang, Y.A.

doi:10.1016/j.matchar.2016.04.010

Cited by 54 publications

(17 citation statements)

References 32 publications

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“…However, review of published studies [8,9] also shows that spray formed materials frequently contain a high volume fraction of pores which limit their ductility. Approaches to solve the porosity problem include extrusion, hot/cold roll or iso-static pressing, heat treatment, and forging following spray forming [10][11][12][13]. In reference [14], AZ91 prepared by spray forming and extrusion exhibited outstanding combinations of mechanical properties with a tensile ultimate strength (UTS) of 435 MPa, and YS of 360 MPa, and elongation to failure (EF) of 9.2%, whereas the hot-rolled AZ91 alloy [15] exhibited a UTS of 345 MPa and a YS of 297 MPa.…”

Section: Introductionmentioning

confidence: 99%

Enhanced strength and ductility of AZ80 Mg alloys by spray forming and ECAP

Tang

Zhao

Исламгалиев

et al. 2016

Materials Science and Engineering: A

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The relatively low strength and poor ductility of conventional AZ80 Mg alloys have been attributed to the limited number of independent slip systems, in combination with the formation of fragile eutectic β-Mg17Al12 networks at grain boundaries. In an effort to overcome these limitations, spray forming followed by equal channel angular pressing (ECAP) was employed to obtain a unique bi-modal microstructure: coarse grains were separated and surrounded by deformation networks consisting of ultrafine-grained Mg with an average grain size of 0.6 μm and ellipsoidal shaped β-Mg17Al12 particles with sizes of 200-300 nm. Tensile tests revealed the advantage of this structure: a yield strength of 235 MPa combined with an elongation to failure of 14%; the values are significantly higher than those of their conventional counterparts (100 MPa-12%, and 140 MPa-5%). The underlying strengthening and deformation mechanisms of this particular microstructure are

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Section: Introductionmentioning

confidence: 99%

Enhanced strength and ductility of AZ80 Mg alloys by spray forming and ECAP

Tang

Zhao

Исламгалиев

et al. 2016

Materials Science and Engineering: A

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“…[3,7] Meanwhile, they are apt to form large-size and uneven carbide bands even after a substantial amount of hot plastic deformation, deteriorating the toughness and isotropic properties of steel. [2,[8][9][10][11] In addition, the difference in the cooling rate from the center to the edge of the cast ingot results in a serious non-uniform distribution of M 6 C eutectic carbides at the macroscopic scale. [1,12] Therefore, improving the as-cast structure is of significance for M42 HSS to obtain the superior overall performance.…”

Section: Introductionmentioning

confidence: 99%

Evolutions of Micro- and Macrostructure by Cerium Treatment in As-Cast AISI M42 High-Speed Steel

Jiao

Feng

et al. 2020

Metall Mater Trans B

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The as-cast M42 high-speed steels containing different contents of cerium (Ce) were manufactured to investigate the effects of Ce on the solidification structures at the micro-and macroscale. The results indicate that the addition of Ce could modify MgOAEAl 2 O 3 and MnS into the Ce-containing inclusions. The addition of Ce refined the dendrite structure and eutectic carbides, which can be ascribed to the heterogeneous nucleation of primary austenite on Ce 2 O 2 S or Ce 2 O 3 and the increase in both the compositional supercooling at the dendrite forefront and the restriction on the dendrites coarsening. Both the secondary dendrite arm spacing (SADS) and total eutectic carbides content decrease gradually with increasing Ce content. M 2 C and M 6 C carbides are the predominant precipitates. The increase of Ce content made the morphology of M 2 C carbides change from long lamellar or straight-rod morphology into shorter curved-rod or honeycomb morphology because of the overgrowth of eutectic austenite, but it had no significant effect on the morphology of M 6 C carbides. Ce 2 O 2 S and Ce 2 O 3 can serve as the very effective heterogeneous nucleation sites for M 6 C carbides because of the low lattice disregistry between them, hence Ce addition improved markedly the macroscopic distribution of M 6 C carbides in the cast ingot and promoted the formation of M 6 C carbides at the expense of M 2 C carbides.

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“…22 The spray-forming process was one of the effective methods to improve the catalyst particles and simplify their separation from the reaction system. 23…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Microspheres by Nano-TS-1 Crystals via a Spray-Forming Process: From Screening to Scale-up

Niu

Liu

Gao³

et al. 2019

ACS Omega

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The spray-forming process of the nano-titanium silicalite (TS-1) zeolite was investigated and optimized in the lab in order to obtain materials with microsphere morphology and superior catalytic activity in cyclohexanone ammoximation on the industrial scale. The effects of spray-forming parameters, such as the state of the TS-1 raw material, load ratio, solid content, binder content, and calcination temperature, on the physicochemical and catalytic properties of TS-1 microspheres were investigated in detail. It was interesting to find that the shape of the spray-forming sample formed by wet powders was more intact than the sample formed by dried powders. Furthermore, the spray-forming process was successfully scaled up to a large spray device (LGZ-1000) according to the similarity principle of load ratio, and the shape of the TS-1 microspheres was as perfect as the spray-forming samples in the lab. The similarity principle of the load ratio for the spray-forming of titanium silicate was established and verified for the first time. The spray-forming TS-1 microspheres produced in the industry were used in cyclohexanone ammoximation, and ketone conversion and oxime selectivity were as high as 99.9 and 99.4%, respectively.

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Improved the microstructures and properties of M3:2 high-speed steel by spray forming and niobium alloying

Cited by 54 publications

References 32 publications

Enhanced strength and ductility of AZ80 Mg alloys by spray forming and ECAP

Enhanced strength and ductility of AZ80 Mg alloys by spray forming and ECAP

Evolutions of Micro- and Macrostructure by Cerium Treatment in As-Cast AISI M42 High-Speed Steel

Fabrication of Microspheres by Nano-TS-1 Crystals via a Spray-Forming Process: From Screening to Scale-up

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