FIELD: manufacture of elongated, mainly cylindrical products of construction high-strength steel used for making heavy-load parts operating in condition of twisting and bending due to action of dynamic load.
SUBSTANCE: method comprises steps of melting steel containing, mass %: C, 0.15 - 045; Si, 0.2 - 1.0; Mn, 0.2 - 2.0; Cr, 0.1 - 2.0; Ni, 0.1 - 5.0; Mo, + 3 W, 0.01 - 0.9; Fe and impurities, the balance when next relation is satisfied: Ni + 1.2 Cr + 1.5 Mn≤ 9 - 0.6 C. Steel is cast to ingots or to continuously cast billets. The last are subjected to plastic working. Then billets are cooled till temperature 350 -450°C at cooling rate V satisfying to next relation: V ≥ 0.37 + 1.45/Ni. Products are characterized by improved plastic properties, especially impact viscosity at high strength.
EFFECT: stable mechanical properties of products at operation due to optimally selected components of steel, uniform structure of steel, improved plastic properties of products.
24 cl, 3 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| STEEL, PRODUCT MADE OUT OF THE STEEL AND THE METHOD OF ITS MANUFACTURE | 2005 |
|
RU2270269C1 |
| STEEL, ARTICLE FROM STEEL AND METHOD OF ITS PRODUCTION | 2005 |
|
RU2693990C1 |
| CORROSION-RESISTANT STEEL AND THE PRODUCT MADE OUT OF IT | 2005 |
|
RU2270268C1 |
| HIGH-STRENGTH DYNAMIC IMPACT RESISTANT STEEL AND METHOD FOR PRODUCTION OF THIS STEEL SHEETS | 2011 |
|
RU2456368C1 |
| HIGH-STRENGTH STAINLESS STEEL | 2003 |
|
RU2243286C1 |
| HIGH-STRENGTH, HIGH-HARDNESS STEEL AND PRODUCTION OF SHEETS THEREFROM | 2016 |
|
RU2654093C2 |
| HIGH-STRENGTH MEDIUM-CARBON FULLY-ALLOYED STEEL | 2012 |
|
RU2510424C1 |
| HIGH-STRENGTH NONMAGNETIC STEEL | 2010 |
|
RU2447186C2 |
| STAINLESS HIGH-STRENGTH STEEL | 2006 |
|
RU2346074C2 |
| HIGH-STRENGTH LOW-ALLOY CONSTRUCTIONAL STEEL | 2016 |
|
RU2617070C1 |
