Evaluation of Wear Characteristics of AISI H13 Tool Steel Repaired by Metal 3D Printing

Lee, Sung-Yun; Lee, Inkyu; Jeong, Myeong-Sik; Lee, Jae‐Wook; Lee, Seon-Bong; Lee, Sang-Kon

doi:10.14775/ksmpe.2017.16.4.009

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Kim et al [ 17 ] deposited the AISI M2 metal powder on the substrate surface using DED and improved the surface hardness by 30–50% when compared to that of the conventional tool steel. Lee et al [ 18 ] evaluated the wear characteristics of specimens fabricated by AM, welded specimens and raw materials using the H13 hot work tool steel. The specimens fabricated by AM exhibited the highest hardness, whereas the welded specimens presented the lowest hardness.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of Deposited Fe-8Cr-3V-2Mo-2W on SCM420 Substrate Using Directed Energy Deposition and Effect of Post-Heat Treatment

Jeong

Lee

et al. 2021

Materials

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In this study, the Fe-8Cr-3V-2Mo-2W tool steel powder was deposited on the SCM420 substrate through the directed energy deposition (DED) process. This study focuses on the mechanical properties of the deposited Fe-8Cr-3V-2Mo-2W and the effect of heat treatment on it. The changes in the microstructural characteristics of the deposited region due to heat treatment after deposition were observed. The influence of heat treatment on the mechanical properties was then analyzed accordingly and hence, the hardness, wear, impact and tensile tests were conducted on the deposited material. These properties were compared with those of the commercial tool steel powder M2-deposited material and the carburized specimen. In the deposited Fe-8Cr-3V-2Mo-2W layer, an increased martensite phase fraction was obtained through post-heat treatment and the amount of precipitated carbides was also increased. This increased the hardness from 48 to 62 HRc after heat treatment and the wear resistance was significantly improved as well. The amount of impact energy absorbed decreased from 11 J before heat treatment to 6 J after heat treatment, but the tensile strength significantly increased from 607 to 922 MPa. When compared with the M2-deposited surface, the Fe-8Cr-3V-2Mo-2W deposits had 3% lower surface hardness and 76% lower fracture toughness but exhibited 56% higher tensile strength. When compared with the carburized SCM420, the Fe-8Cr-3V-2Mo-2W deposits exhibited 3% higher surface hardness and wear resistance, 90% lower fracture toughness and 5% higher tensile strength. This study shows that surface hardening through DED can exhibit similar or superior mechanical properties when compared to carburizing.

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Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of Deposited Fe-8Cr-3V-2Mo-2W on SCM420 Substrate Using Directed Energy Deposition and Effect of Post-Heat Treatment

Jeong

Lee

et al. 2021

Materials

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“…However, in the case of high carbon materials (H13, D2), verification was not possible due to the limited characteristics of additive manufacturing. On the other hand, to overcome the limitation on the lamination of high-strength tool steel powder, many studies have been conducted on mold repair and mold strengthening through partial addition of heterogeneous materials using the directed energy deposition (DED) method [11][12][13][14]. In these studies, to obtain the mechanical properties required for a punch mold, a high toughness material with a relatively low strength was applied to the substrate material, and a high strength functional part was partially additive with a high strength powder.…”

Section: Introductionmentioning

confidence: 99%

A Study on Strengthening Mechanical Properties of a Punch Mold for Cutting by Using an HWS Powder Material and a DED Semi-AM Method of Metal 3D Printing

Choi

Kim

Yum

et al. 2020

JMMP

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The post-processing (punching or trimming) of high-strength parts reinforced by hot stamping requires punch molds with improved mechanical properties in hardness, resistance to wear, and toughness. In this study, a semi-additive manufacturing (semi-AM) method of heterogeneous materials was proposed to strengthen these properties using high wear resistance steel (HWS) powder and directed energy deposition (DED) technology. To verify these mechanical properties as a material for the punch mold for cutting, specimens were prepared and tested by a semi-AM method of heterogeneous material. The test results of the HWS additive material by the semi-AM method proposed in this study are as follows: the hardness was 60.59–62.0 HRc, which was like the Bulk D2 specimen. The wear resistance was about 4.2 times compared to that of the D2 specimen; the toughness was about 4.0 times that of the bulk D2 specimen; the compressive strength was about 1.45 times that of the bulk D2 specimen; the true density showed 100% with no porosity. Moreover, the absorption energy was 59.0 J in a multi-semi-AM specimen of heterogeneous materials having an intermediate buffer layer (P21 powder material). The semi-AM method of heterogeneous materials presented in this study could be applied as a method to strengthen the punch mold for cutting. In addition, the multi-semi-AM method of heterogeneous materials will be able to control the mechanical properties of the additive material.

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CAPP for 3D Printer with Metallic Wire Supplied from the Front

Kim¹,

Kim²

2018

KSMPE

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Evaluation of Wear Characteristics of AISI H13 Tool Steel Repaired by Metal 3D Printing

Cited by 4 publications

References 22 publications

Microstructures and Mechanical Properties of Deposited Fe-8Cr-3V-2Mo-2W on SCM420 Substrate Using Directed Energy Deposition and Effect of Post-Heat Treatment

Microstructures and Mechanical Properties of Deposited Fe-8Cr-3V-2Mo-2W on SCM420 Substrate Using Directed Energy Deposition and Effect of Post-Heat Treatment

A Study on Strengthening Mechanical Properties of a Punch Mold for Cutting by Using an HWS Powder Material and a DED Semi-AM Method of Metal 3D Printing

CAPP for 3D Printer with Metallic Wire Supplied from the Front

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