Investigation of applying protective sheet metal die covers for hot forging dies on a cross-forging geometry

Yu, Yingyan; Zottis, Juliana; Wolfgarten, Martin

doi:10.1007/s00170-018-03250-4

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…The main focus of these techniques is to improve the tools life due to the modification of surface properties. Since their longer use necessitates the repairs or replacements; therefore, surface treatments such as coatings, nitriding, and welding overlays are usually applied to protect them which are expensive [7][8][9][10] . In addition, the tools replacement causes a long interruption time during production.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier in the literature, the boron alloys particularly 22MnB5 have shown promising mechanical resistances 11,12 . Yu et al 10 have tested 22MnB5 as mask manufactured by deep drawing and later subjected to 40 forging cycles. Hot stamping is an emerging technology to increase the 22MnB5 steel grade strength extensively used in automobile industry 13,14 .…”

Section: Introductionmentioning

confidence: 99%

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22MnB5 Performance as Surface Protection Mask Under Harsh Forging Conditions and its Wear Insight

Costa,

Brito,

Rosiak

et al. 2023

Mat. Res.

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Herein, the applicability and performance of 22MnB5 steel sheets as protective masks over hot forging dies has been analyzed. Two masks were obtained following two different approaches; by heat treatment of flat sheets in cooling conditions similar to the process of hot stamping and hot stamping on the axial geometry of a cylindrical part. In both processes the sheets were austenitized at 1100° C for 7 min and to obtain bainite microstructure, they were maintained at temperatures higher than 700°C. The flat and axial masks have been subjected to 100 forging cycles for each geometry and positioned on the lower surface of hot forging dies. Surface integrity has been analyzed from microhardness profiles, roughness tests, thickness measurements, optical and electron microscopy. Wear mechanisms have been observed in both masks which was more expressive in the axial mask. Abrasive wear and plastic deformation have been actively observed in both masks; however, they have shown firmness for application as masks.

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Section: Introductionmentioning

confidence: 99%