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Heat Treatment to Slow Strain Aging in Threaded Steel Bolts

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Abstract

As a rule, cold-deformed bolts do not contain alloying elements, which slow strain aging. Therefore, natural and artificial strain aging may decrease their resistance to ductile and brittle fracture. The mechanical properties of M12 × 1.75 × 70 mm 1.1152 steel bolts (strength class 5.8) are investigated after strain aging. A method is proposed for slowing the strain aging of cold-deformed steel fasteners: specifically, favorable dislocational structure is produced from the initial structure by heat treatment.

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REFERENCES

  1. GOST (State Standard) ISO 898-1–2014: Mechanical Properties of Fasteners Made of Carbon Steel and Alloy Steel, Part 1: Bolts, Screws, and Studs of Specified Property Classes with Coarse and Fine Pitch Thread, Moscow: Standartinform, 2015.

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Authors and Affiliations

  1. National Metallurgical Academy of Ukraine, 49600, Dnipro, Ukraine

    Yu. P. Gul’, G. I. Perchun, P. V. Kondratenko, V. S. Chmeleva & A. V. Ivchenko

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  1. Yu. P. Gul’
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  2. G. I. Perchun
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  3. P. V. Kondratenko
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  4. V. S. Chmeleva
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  5. A. V. Ivchenko
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Corresponding author

Correspondence to G. I. Perchun.

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Translated by Bernard Gilbert

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Gul’, Y.P., Perchun, G.I., Kondratenko, P.V. et al. Heat Treatment to Slow Strain Aging in Threaded Steel Bolts. Steel Transl. 49, 137–140 (2019). https://doi.org/10.3103/S0967091219020098

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  • DOI: https://doi.org/10.3103/S0967091219020098

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