Dissolution and soldering behavior of nitrided hot working steel with multilayer LAFAD PVD coatings

Joshi, Vivek; Kulkarni, K; Shivpuri, Rajiv; Bhattacharya, R. S.; Dikshit, S. J.; Bhat, Deepak

doi:10.1016/s0257-8972(01)01426-8

Cited by 29 publications

(19 citation statements)

References 3 publications

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“…The molten alloy reacts to the iron rich surface, thereby causing intermetallic formation and dissolution of the steel surface into the melt. 8) Furthermore, oxidation is one of the most economical and effective methods to improve erosion and corrosion resistance of steels. 4,11,12) The objective of this study is to explore the possibility of surface engineering of the AISI H13 steel surface to reduce erosion and corrosion of the die surfaces.…”

Section: -7)mentioning

confidence: 99%

Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Chang

Tang

Huang³

2010

ISIJ Int.

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In this work, H13 tool steel was prepared with different oxidation treatments to investigate the effects of oxidation temperature and soaking time. In order to improve erosion and corrosion resistance, this study tested with oxidation temperatures of 560°C, 580°C, and 600°C, and oxidation soaking times of 1 h, 2 h, and 3 h, respectively. Experimental results showed that the oxidation treatment at 600°C and for 3 h is the optimum process. The average thickness of the oxide layer was 9.2 mm. It showed that the oxide layer (Fe 3 O 4 ) can protect and improve the aluminum erosion of H13 steel. The specimens that underwent the oxidative procedure were proven to effectively reduce the ratio of Al-Fe-Si compounds during erosion tests of A380 alloy solution. In addition, the results showed that the oxide layer can enhance polarization resistance, and quickly generate a passivation layer to increase the ability of corrosion resistance.KEY WORDS: H13 tool steel; erosion; corrosion; oxidation; A380 alloy. 569© 2010 ISIJ in order to enhance the erosion rate and weight loss. After removing the aluminum, specimens were cleaned with NaOH to remove any oxide or other residue. The weight loss percentage of erosion test is calculated as follows:Weight loss (%)ϭ(IWϪAW)/IWϫ100 IW is the initial weight, and AW is the weight after erosion test.Corrosion potential analysis adopted three electrodes method. Reference electrode was saturated with silver-silver chloride electrode, auxiliary electrode was a Platinum electrode, and working electrode was connected to the testing specimens. The contact area of specimen was 2.01 cm 2 . Meanwhile, the corrosive solvent used 3.5 wt% NaCl, and was kept at room temperature. The main parameters of corrosion testing included: scanning speed of 0.5 mV s Ϫ1, initial potential of Ϫ1.5 V, and the final potential of 0.5 V. The polarization curve was obtained by Corr-View software for analysis, and compared with different oxidation parameters of the corrosion potential (E corr ) and corrosion current (I corr ). Finally, the polarization resistances (R p ) of different oxidation treatments for AISI H13 tool steel were compared. To evaluate the improvement in erosion and corrosion resistance of AISI H13 tool steel via different oxidation processes, erosion and corrosion tests, XRD and EDS, and microstructure inspections were performed. Figure 3 shows the XRD patterns of H13 tool steel after 560°C 1 h, 2 h, and 3 h of oxidation treatment. As seen, the strongest peak is the original a-Fe structure, in addition, there are two other different crystal structures, Obviously, at the same temperature and different soaking times of oxidation treatment, XRD analysis indicated that two different kinds of oxide layers were provided after oxidation treatments, which are the crystal structures of Fe 3 O 4 and Fe 2 O 3 . The intensity of the original a-Fe gradually decreased as the soaking time of oxidation increased, indicating that increasing the soaking time of oxidation would reduce the proportion of the a-Fe structur...

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Section: -7)mentioning

confidence: 99%

Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Chang

Tang

Huang³

2010

ISIJ Int.

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“…Although, these effects are reduced by application of die lubricant the tool surfaces wear due to erosion, soldering and thermal fatigue, which commonly act simultaneously [1,2]. Due to wear, tool operation becomes difficult, production efficiency is reduced, castings lose tolerances and quality of their surface finish is reduced [3].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, diffusion layers, thin ceramic coatings and their RESEARCH combinations are applied for increasing the wear resistance of HPDC tools [1,2]. Coatings produced by physical vapor deposition (PVD) have a range of required mechanical properties and high chemical inertness in molten metals [1,2,5].…”

Section: Introductionmentioning

confidence: 99%

Ejection Performance of Coated Core Pins Intended for Application on High Pressure Die Casting Tools for Aluminium Alloys Processing

Terek¹,

Kovačević²,

Miletić³

et al. 2017

Tribol. Ind.

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“…Moreover, it adds additional erosion and corrosion resistance through surface treatments. [1][2][3] To extend the die-casting die life, nitriding treatment is often applied to the die surface. Nitriding is a thermo-chemical treatment with nitrogen diffusion, which leads to the surface hardness of the treated dies, due to compressive internal stress within the nitrogen-enriched layer.…”

Section: Introductionmentioning

confidence: 99%

Effects of Post-oxidizing Treatment on Melting Loss and Corrosion Resistance of Gas Nitrided AISI H13 Tool Steel

Chang

Tang

Huang³

et al. 2012

ISIJ Int.

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This study conducted gas nitriding on AISI H13 steels, followed by oxidization treatments at various temperatures (560°C, 580°C, 600°C) and soaking times (1 h, 2 h, 3 h), to investigate the melting loss and corrosion resistance of A380 aluminum alloy. The experimental results indicated that the samples of oxynitriding (post-oxidizing treatment after nitrided) at 580°C for 3 h, 600°C for 2 h and 600°C for 3 h have better ability to resist melting loss due to their thicker oxidized layers. The weight loss rate also showed that they are near zero after a 4 h erosion test. The increasing weight loss rate is relative to the appearance of the FexAlySiz compound. In addition, the difference in corrosion current is closely related to the corrosion rate. A smaller corrosion current will lead to a smaller corrosion rate. As a result, increasing the temperature and soaking time of oxidization is advantageous to the corrosion resistance, and a small variation in corrosion current will result in a significant change to the polarization resistance of corrosion. Consequently, the oxide layer can enhance the polarization resistance, and quickly generate a passivation layer that increases the corrosion resistance ability.

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Dissolution and soldering behavior of nitrided hot working steel with multilayer LAFAD PVD coatings

Cited by 29 publications

References 3 publications

Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Ejection Performance of Coated Core Pins Intended for Application on High Pressure Die Casting Tools for Aluminium Alloys Processing

Effects of Post-oxidizing Treatment on Melting Loss and Corrosion Resistance of Gas Nitrided AISI H13 Tool Steel

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