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The factor of structure and mechanical properties in the production of critical fixing hardware 38XA

Authors :
Pachurin, G. V.
Shevchenko, S. M.
Mukhina, M. V.
Kutepova, L. I.
Zhanna Smirnova
Source :
Scopus-Elsevier, Tribology in Industry, Vol 38, Iss 3, Pp 385-391 (2016)

Abstract

Fixing hardware made of carbon, high-carbon, and alloyed wires is one of the widespread critical parts in mechanical engineering. The characteristics of fixtures and fasteners and their performance figures are assessed at all stages of steel-making operation, from the choice of burden stock for metal smelting to the method of preparing calibrated rolled metal parts and upsetting end products. Material used for producing long high-duty bolts must be both sufficiently strong and ductile, have homogeneous mechanical properties and chemistry, and no inner or surface defects. When manufacturing fasteners, hot-rolled metal is often plastically deformed by drafting before cold upsetting, and all unacceptable defects are removed by the expensive procedure of lathe-turning. Moreover, this technology of metal processing entails losses of up to 5.5 % in chips. This paper suggests a resource-efficient and environmentally friendlier fabrication method for calibrated rolled metal items made of steel 38XA, 9.65 mm diameter, for cold die-forging of high-duty bolts used in automotive engines, which helps spare expensive lathe-machining processes. Moreover, rolled steel produced using this technology is characterized by high resistance to plastic deformation when cold, which leads to increase n wear-resistance of tools in cold die-forging of bolts.

Details

Database :
OpenAIRE
Journal :
Scopus-Elsevier, Tribology in Industry, Vol 38, Iss 3, Pp 385-391 (2016)
Accession number :
edsair.dedup.wf.001..245c41b4bb950d7702f9ff940ac8c23b