首页>
外国专利>
METHOD FOR PRODUCTION OF SEAMLESS COLD-DEFORMED HIGH-STRENGTH PIPES FROM ALLOY UNS N06625
METHOD FOR PRODUCTION OF SEAMLESS COLD-DEFORMED HIGH-STRENGTH PIPES FROM ALLOY UNS N06625
展开▼
机译:用uns N06625合金生产无缝冷变形高强度管的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
FIELD: metal forming.;SUBSTANCE: invention can be used in production of pipes from chromium-nickel alloy used mainly in field underwater pipelines. Proposed method comprises plastic deformation and heat treatment of tubes of intermediate dimensions, plastic deformation to finished size with final heat treatment, as well as straightening, while material for pipes is UNS N06625 alloy with content of basic chemical elements, wt%: nickel ≥ 58; chromium 20.0–23.0; molybdenum 8.0–10.0; iron ≤ 5.0; niobium + tantalum 3.15–4.15; cobalt ≤ 1.0; manganese ≤ 0.50; silicon ≤ 0.50; aluminum ≤ 0.40; titanium ≤ 0.40; carbon ≤ 0.10, final heat treatment of pipes is carried out at temperature of 960–980 °C for 10–15 minutes, after which it is cooled in air.;EFFECT: invention makes it possible to manufacture pipes having mechanical properties corresponding to following values: ultimate strength σv – not less than 827 MPa; yield point σ0_2 – not less than 414 MPa; 50 mm specific elongation δ50 – not less than 30 %; hardness – no more than 25 HRC.;1 cl, 1 tbl, 2 ex, 1 dwg
展开▼