The Factor of Structure and Mechanical Properties in the Production of Critical Fixing Hardware 38XA

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 meta...

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Bibliographic Details
Published in:Tribology in industry 2016-09, Vol.38 (3), p.385-391
Main Authors: Pachurin, G V, Shevchenko, S M, Mukhina, M V, Kutepova, L I, Smirnova, J V
Format: Article
Language:English
Subjects:
Annealing
Calibration
Carbon
Cold
Cooling
Etching
Fasteners
Hot rolling
Hydrochloric acid
Manufacturing
Mechanical engineering
Mechanical properties
Metallurgy
Rolled steel
Stamping
Steel products
Structure
Tribology
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Summary: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.
ISSN:0354-8996
2217-7965