Improved ejection test for evaluation of soldering tendency of cast alloy to die core materials

Terek, Pal; Kovačević, Lazar; Miletić, Aleksandar; Kukuruzović, Dragan; Baloš, Sebastian; Škorić, Branko

doi:10.1016/j.jmatprotec.2018.10.038

Cited by 6 publications

(15 citation statements)

References 19 publications

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“…The employed ejection test is explained in detail in our previous works [3,21]. In this test a cylindrical pin-shaped sample is cast-in in an Al-Si-Cu alloy casting.…”

Section: Soldering Evaluation-ejection Testmentioning

confidence: 99%

“…In this study, pin-casting assemblies were produced in two configurations (methods). In the first configuration the casting was performed by gravity pouring molten EN AC-46200 aluminum alloy, at temperature of 730 • C, into a specially designed steel die [3,21], preheated to temperature of 320 • C. After the die was filled, the casting is allowed to solidify. In the rest of the article this configuration will be referred as conventional solidification method.…”

Section: Soldering Evaluation-ejection Testmentioning

confidence: 99%

“…Evaluation of performance of coating materials through practical experiments is time consuming, expensive, less controllable, and is highly limited in terms of studying of isolated, specific wear mechanisms (soldering, erosion, thermal fatigue) [21]. On the other hand, laboratory experiments are simple, quick, they provide isolation of a single wear mechanism, have high repeatability, and allow quantification of wear.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, laboratory experiments are simple, quick, they provide isolation of a single wear mechanism, have high repeatability, and allow quantification of wear. One group of the laboratory tests used for evaluation of the soldering tendency, are separation tests [21]. These tests involve metal casting process for production of sample-casting assembly and a mechanical process of separation of a sample from a casting.…”

Section: Introductionmentioning

confidence: 99%

“…A separation test used for evaluation of cylindrical pin samples is known as an ejection test. The improved ejection test, developed in our previous work [21], is simple to perform, however, it simulates only one casting cycle. In this test, the time cast alloy spends in contact with a pin sample is very short and therefore mainly mechanical soldering effects are simulated [21].…”

Section: Introductionmentioning

confidence: 99%

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Metallurgical Soldering of Duplex CrN Coating in Contact with Aluminum Alloy

et al. 2020

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Coatings deposited by physical vapor deposition (PVD) significantly reduce the wear of high pressure die casting tools; however, cast alloy soldering still has a strong negative effect on production efficiency. Although a lot of research has been already done in this field, the fundamental understanding of aluminum alloy soldering toward PVD coatings is still scarce. Therefore, in this work the performance of CrN duplex coatings with different roughness is evaluated by a modified ejection test performed with delayed (DS) and conventional casting solidification (CS). After the ejection tests, sample surfaces and layers were subjected to comprehensive characterizations of their morphological and chemical characteristics. Considerably lower values of the ejection force were recorded in DS experiments than in CS experiments. Surface roughness played an important role in the CS experiments, while samples with different surface topographies in the DS experiments performed in a similar fashion. The decrease in the ejection force, observed in DS tests, is attributed to the formation of a thick Cr–O layer on CrN coating which reduced soldering and sliding friction against thick Al–O casting scale. The Cr–O layer formed in DS experiments suffered from diffusion wear by cast alloy. The observed oxidation phenomena of nitride coatings may be utilized in a design of non-sticking coatings.

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“…The employed ejection test is explained in detail in our previous works [3,21]. In this test a cylindrical pin-shaped sample is cast-in in an Al-Si-Cu alloy casting.…”

Section: Soldering Evaluation-ejection Testmentioning

confidence: 99%

Section: Soldering Evaluation-ejection Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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