Title:
HEAT-RESISTANT HIGH-TEMPERATURE STEEL
Document Type and Number:
WIPO Patent Application WO/2001/004372
Kind Code:
A1
Abstract:
The present invention relates to an austenitic heat-resistant high-temperature steel for the production of articles used in combustion products from highly-aggressive organic fuels (e.g. high-sulphur black oils, carbons, shale, crude-oil cracking products and others) at temperatures of up to 650°C, mainly pipes for the heating surfaces of steam superheaters. The use of the chromium-manganese steel increases the steel service characteristics (high-temperature strength increased more than twice at working temperatures and mainly upon repeated starting and stopping and length plasticity of 35 to 40 %), the exploitation reliability and the functional resources at least two or three times. To this end the austenitic heat-resistant high-temperature steel includes carbon, chromium, manganese, silicon, nickel, copper, zirconium, cerium, titanium, niobium and iron as well as aluminium and boron. The components are selected according to the following proportions: from 0.05 to 0.15 wt. % of carbon; from 1.0 to 2.0 wt. % of silicon; from 8.0 to 16.0 wt. % of manganese; from 8.0 to 15.0 wt. % of chromium; from 0.5 to 3.8 wt. % of nickel; from 0.5 to 6.0 wt. % of copper; from 0.01 to 0.09 wt. % of zirconium; from 0.01 to 0.15 wt. % of cerium; from 0.04 to 0.1 wt. % of titanium; from 0.2 to 3.0 wt. % of niobium; from 0.01 to 0.25 wt. % of aluminium; from 0.001 to 0.08 wt. % of boron; the balance consisting of iron and unavoidable impurities.
Inventors:
KUZNETSOV EVGENY VASILIEVICH (RU)
CHECHEL LJUDMILA ANATOLIEVNA
MITROFANOV ALEXANDR ANATOLIEVI
ZUBCHENKO ALEXANDR STEPANOVICH
PAULI VIKTOR KARLOVICH
CHECHEL LJUDMILA ANATOLIEVNA
MITROFANOV ALEXANDR ANATOLIEVI
ZUBCHENKO ALEXANDR STEPANOVICH
PAULI VIKTOR KARLOVICH
Application Number:
PCT/RU1999/000225
Publication Date:
January 18, 2001
Filing Date:
July 12, 1999
Export Citation:
Assignee:
KUZNETSOV EVGENY VASILIEVICH (RU)
International Classes:
C22C38/00; C22C38/34; C22C38/42; C22C38/48; C22C38/50; C22C38/58; (IPC1-7): C22C38/58
Foreign References:
| JPH0770700A | 1995-03-14 | |||
| SU1700094A1 | 1991-12-23 | |||
| SU874761A1 | 1981-10-23 | |||
| RU2116374C1 | 1998-07-27 | |||
| GB2075550A | 1981-11-18 | |||
| US4946644A | 1990-08-07 |
Attorney, Agent or Firm:
Matevosov, Levon Matevosovich (ot. 40 ul. Sharikopodshipnikovskaya 4 Moscow, 8, RU)
Download PDF: