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Tribological characteristics of stamping dies with coatings

Authors: Emil Evin; Milan Ábel; Ján Viňáš; Jana Tkáčová; Bogdan Antoszewski;

Tribological characteristics of stamping dies with coatings

Abstract

A variety of cast iron and steel grades are used for manufacturing dies in stamping industry. The costs of these materials may vary considerably. However, with appropriate surface treatments, coatings and lubricants, a cost-effective die material may outperform the expensive ones. Therefore, in selecting die materials, a systematic evaluation of tool materials, coatings and heat treatments are required, considering the cost and tool life as parameters. In the contribution the plasma sprayed ceramic coatings Cr203 and Al2O3 were investigated in sliding contact with steel in both, the block-on-ring arrangement (tester T 05) and deep drawing process. The friction coefficient and wear of these coatings were measured at dry friction conditions and with lubricant at utilization of tester T 05. For different types of die rings (with and without ceramic coatings) the punching forces were measured during deep-drawing process. The results show that the main advantage of application of A1203 and Cr203 coatings on dies contact surfaces in comparison with dies made of tool steel may be the increase of life-time and wear resistance, the increase of the cup surface quality, savings of deficient elements by replacement of expensive tool steels by common constructional steels.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
gold