The design and additive manufacturing of an eco-friendly mold utilized for high productivity based on conformal cooling optimization

Heogh, Woongbeom; Yeon, Si Mo; Kang, Dongseok; Park, Seonghwan; Park, Seongjun; Ryu, Kwanho; Sun, J.H.; Ji, Leecheol; Son, Yong; Choi, Kyunsuk; Ha, Cheol Woo

doi:10.1016/j.matdes.2022.111088

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…In addition to prolonging their lifespans and minimizing the production costs, failed molds might be repaired to increase the efficiency of the mold materials' utilization. The typical mold repair techniques include laser cladding, brush plating, and thermal spray welding [8][9][10]. Each of these techniques creates a heat-affected zone (HAZ) in the repair region, which usually reflects an increase in the area of the HAZs, leading to a greater susceptibility to localized deformation.…”

Section: Introductionmentioning

confidence: 99%

Hot Work Mold Repaired via Hot Isostatic Pressing towards High Red Hardness

Ge,

Ma,

Chen

et al. 2023

Metals

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Repairing hot work molds can extend their lifespans and reduce the production costs. This study presents a proposed method for enhancing the red hardness and strength of repaired molds. The method involves utilizing PM23 high-speed steel powder to repair H13 steel molds with two distinct surface states through the process of hot isostatic pressing (HIP). The internal microstructure changes, bonding state, fracture morphology, and crack extension behaviors of the repaired molds are characterized using scanning electron microscopy and electron backscatter diffraction technology. Additionally, the mechanical properties, including red hardness and tensile strength, are quantitatively analyzed. The findings indicate that the repaired area in the sandblasted sample exhibits a rough and uneven structure, demonstrating exceptional toughness. The tensile strength of the repaired region is approximately 1195.42 MPa, while the hardness measures around 672.8 HV. These properties effectively enhance the performance of the molds. The experimental findings indicate that HIP can effectively restore molds, resulting in enhanced red hardness and improved toughness, particularly when combined with sandblasting as a pretreatment method.

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Section: Introductionmentioning

confidence: 99%

Hot Work Mold Repaired via Hot Isostatic Pressing towards High Red Hardness

Ge,

Ma,

Chen

et al. 2023

Metals

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“…However, this configuration does not provide optimal performance in cooling castings with organic and complex shapes [2,3]. The use of mold inserts is a method to solve issues related to inhomogeneous cooling in complex sections [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermal Contact Resistance between Mold Steel and Additively Manufactured Insert for Designing Conformal Channels: An Experimental Study

Souza

Capela

Lopes

et al. 2022

JMMP

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The focus of this research is on thermal contact resistance between a mold and its insert, specifically inserts made by additive manufacturing (AM). Using a thermal steady-state system and varying contact pressures (0, 50, 75, and 100 bars), we present experimental results of the thermal contact resistance at the contact interface between steel A (1.2344), obtained from an extruded rod, and steel B (1.2709), produced by laser powder bed fusion. Thermal tests were performed for unbonded and bonded configurations. Results showed that increasing the contact pressure allows the system equilibrium to be reached at lower temperatures. Furthermore, thermal tests showed that in the transition zone of the bonded configuration, a well-defined resistance is not formed between the two steel samples as it occurs in the unbonded configuration. For the unbonded configuration, the thermal contact resistance values decrease with increasing applied contact pressure, improving the system’s heat transfer.

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