Dynamic properties of high-density low-alloy PM steels

Zhang, Lin; Liu, Zhiwei; Sun, Haishen; Qin, Mingli; Qu, Xuanhui; Lyu, Yuanzhi

doi:10.1080/00325899.2016.1274815

Cited by 7 publications

(3 citation statements)

References 27 publications

(38 reference statements)

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“…Nevertheless, the presence of pores in general iron-based powder metallurgy parts leads to lower densities compared to those achieved through traditional casting and forging methods. Consequently, the material exhibits significantly diminished dynamic mechanical properties, limiting its widespread utilization [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Effects of copper infiltrant amount and infiltration method on mechanical properties of sintered steel

Lin,

Wang,

Liang

et al. 2024

J. Phys.: Conf. Ser.

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In this paper, the effects of copper infiltrant amount and copper infiltration method on the mechanical properties of Fe-Cu-C-based sintered steel were investigated. The results indicate that the density, tensile strength, impact energy, and hardness of the sintered steel increase with higher copper infiltration. The optimal mechanical properties were achieved when the copper infiltrant amount reached 15%, resulting in a surface hardness of HRC31, an impact energy of 31.34 J, and an ultimate tensile strength of 759 MPa. Furthermore, different copper infiltration methods affected the material’s mechanical properties. When the copper infiltrant amount was 12.5%, the impact energy of the sintered steel sample was 15.41% higher using the bottom copper infiltration process (30.19 J) compared to the top copper infiltration process (26.16 J). These findings provide valuable insights for enhancing the mechanical properties of iron-based powder metallurgy sintered steel with copper infiltration.

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Section: Introductionmentioning

confidence: 99%

Effects of copper infiltrant amount and infiltration method on mechanical properties of sintered steel

Lin,

Wang,

Liang

et al. 2024

J. Phys.: Conf. Ser.

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“…The biggest challenge of PM steel is the 5–15 vol% porosity, which obviously deteriorates the mechanical and corrosion performances [ 1 , 2 , 3 ]. Several techniques, such as warm compaction, double-press double-sintering, powder forging, and spark plasma sintering can decrease the porosity, though these techniques greatly raise the production cost [ 4 , 5 , 6 , 7 , 8 ]. Liquid phase sintering (LPS) is an economical technique to facilitate the sintering densification of PM materials by adding specific alloying elements for liquid generation without obviously increasing the cost [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Tsao

Tsai³

et al. 2022

Materials

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Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical properties, and corrosion resistances of PM 304L austenitic, 410L ferritic, and 410 martensitic stainless steels were investigated. The results showed that adding 0.6 wt% B significantly improved the sintered densities of the three kinds of stainless steels due to the liquid phase sintering (LPS) phenomenon. The borides in 304L + 0.6B, 410L + 0.6B, and 410 + 0.6B were rich in B and Cr atoms but deficient in Fe, Ni, or C atoms, as analyzed by electron probe micro-analysis. Furthermore, the B additive contributed to the improved apparent hardness and corrosion resistance of PM stainless steels. In the 410L stainless steel, the 0.6 wt% B addition increased the corrosion voltage from −0.43 VSCE to −0.24 VSCE and reduced the corrosion current density from 2.27 × 10−6 A/cm2 to 1.93 × 10−7 A/cm2. The effects of several factors, namely: porosity; the generation of boride; the matrix/boride interfacial areas; Cr depletion; and the microstructure on the corrosion performances are discussed. The findings clearly indicate that porosity plays a predominant role in the corrosion resistances of PM austenitic, ferritic, and martensitic stainless steels.

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“…Further, PM processing is an economical route as it generates less raw material wastage over the metal cutting process and is also energy efficient [2,3]. However, PM steels, regardless of all its advantages, are limited by the presence of pores when it comes to high-performance applications especially in dynamic loading conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Experimental and finite element simulation study of capsule-free hot isostatic pressing of sintered gears

Sundaram

Khodaee

Andersson

et al. 2018

Int J Adv Manuf Technol

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A novel approach to reach full density in powder metallurgy (PM) components is demonstrated in this work. Water-atomised Moprealloyed steel powder is utilised for manufacturing cylindrical and gear samples through double pressing and double sintering (DPDS) process route. The effect of sample geometry and powder size fraction on densification is investigated and it is found that the DPDS route enables a density level of > 95% which is sufficient to eliminate the surface open pores. Reaching such high density is necessary, in order to perform capsule-free hot isostatic pressing (HIP). After HIP, full densification is achieved for the cylindrical samples and only near full density is realised for the gears resulting in neutral zone formation due to the density gradient. In order to predict the densification behaviour during the compaction, FEM simulations considering the gear geometry are performed for both the pressing stages and HIP. The simulation predicted a similar densification behaviour with the formation of the neutral zone. The proposed DPDS route with capsule-free HIP in combination with FEM simulation is demonstrated as a potential route for manufacturing full-density PM steel components, e.g. gears, suitable for high-performance applications.

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Dynamic properties of high-density low-alloy PM steels

Cited by 7 publications

References 27 publications

Effects of copper infiltrant amount and infiltration method on mechanical properties of sintered steel

Effects of copper infiltrant amount and infiltration method on mechanical properties of sintered steel

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Experimental and finite element simulation study of capsule-free hot isostatic pressing of sintered gears

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