Hardening the surface of austenitic steels by strain hardening
Steels and Alloys for Cryogenic Technology
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Conclusions
- 1.
The carrying capacity in terms of permissible stress (σ0, 2) of steels Kh18N10T and Kh21N5AG7 under conditions of uniaxial static tension increases 50% down to −253° as the result of surface hardening.
- 2.
For hardened steels Kh18N10T and Kh21N5AG7 σ b n /σn > 1 and σ b n /σ0.2 > 1 with Kt=3.0 in the range of 20 to −253° C.
- 3.
With static loading and bulk stress conditions (notch root radius 0.25 mm) steel Kh18N10T can be used down to −253° C and steel Kh21N5AG7 down to −196° C in the hardened condition.
- 4.
Under dynamic bending conditions steels Kh18N10T and Kh21N5AG7 can be used in the hardened condition down to −253° C in the presence of a stress concentrator (Kt=3.4).
Keywords
Stress Condition Static Loading Strain Hardening Austenitic Steel Stress Concentrator
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Literature cited
- 1.D. V. Lebedev and B. M. Ovsyannikov, Metal, i Term. Obrabotka Metal., No. 9 (1971).Google Scholar
- 2.D. V. Lebedev, Metal. i Term. Obrabotka Metal., No. 3 (1971).Google Scholar
- 3.H. Neuber. Stress Concentrations [Russian translation], ONTI (1947).Google Scholar
Copyright information
© Consultants Bureau 1972