Effect of adhesion and tribological properties of modified composite nanostructured multi-layer nitride coatings on WC-Co tools life http://researchonline.ljmu.ac.uk/id/eprint/9965/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Citation (please note it is advisable to refer to the publisher's version if you intend to cite from this work) Vereschaka, A, Aksenenko, A, Sitnikov, N, Migranov, M, Shevchenko, S, Sotova, C, Batako, ADL and Andreev, N (2018) Effect of adhesion and tribological properties of modified composite nano-structured multi-layer nitride coatings on WC-Co tools life. Tribology International, 128. pp. 313-Abstract:The paper presents the results of the comparative tests of carbide samples with multilayered nano-structured coatings based on titanium nitrides (Ti-TiN-(Ti,Cr,Al,Si)N) and zirconium nitrides (Zr-ZrN-(Nb,Zr,Cr,Al)N and Zr-ZrN-(Zr,Al,Si)N). The phase composition and microstructure of these coatings were studied. The scratch test method was applied to study the adhesion bond strength to the substrate and the coating fracture patterns. The tribological parameters of the coated samples were studied at temperatures of 450°C-900 °C. The cutting properties of the tools with the coatings under study were investigated in turning AISI 321 steel. Various coating parameter effects on the cutting tool life were studied.
Results of a study of the effect of quenching in UZSP-1 quenching medium on the properties of ball-bearing steels ShKhl5, ShKhI5SG, ShKh20SG and data on practical use of solutions of UZSP-I for quenching parts of bearings produced from various steels and subjected to healing for quenching by various methods are presented. Steel from commercial heats has been studied.Earlier studies and production experience have shown
This paper offers a modified theoretical approach towards corporate social responsibility (CSR), adjusted to the specifics of South-South cooperation (SSC). Developing economies are becoming important actors and the number of their companies willing to implement projects in other developing nations is rising. This entrance of developing countries into international projects poses a question whether their companies adhere to basic CSR obligations and their CSR approaches are strategically oriented or if they present an umbrella, covering up their activities. Though the issue of CSR in SSC projects attracts attention, the number of studies on this topic is limited. This paper presents an attempt to work out a theoretical basis to a CSR approach in SSC projects by adjusting a widely accepted CSR model of Carroll (1979, 1991) to the specific conditions of developing economies. For the purpose of this paper, the authors analyzed CSR activities of Chinese companies in Angola. The results lead to the conclusion that governments of countries, participating in SSC projects need a more active approach towards making basic CSR responsibilities (economic, ethical, legal) legally binding. This will allow such international projects to be more beneficial not only for directly interested parties (companies, governments), but also for the local community.
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