FIELD: metallurgy, in particular, production of high-strength parts of specifically compound shape.
SUBSTANCE: method involves melting steel containing, wt%: carbon 0.17-0.32; manganese 0.90-1.40; silicon 0.01-0.17; sulfur 0.005-0.020; chromium 0.01-0.30; vanadium 0.005-0.07; molybdenum 0.005-0.10; nickel 0.005-0.10; niobium 0.005-0.02; titanium 0.01-0.04; boron 0.0005-0.0050; aluminum 0.02-0.06; nitrogen 0.005-0.015; iron the balance, with 12/C-Mn/0.055≤20; 500x(Ti/24-N/7)+0.2≥0; 40≥C/0.01+B/0.001≥33; providing processing beyond furnace; pouring in casting molds while protecting flow; providing hot rolling of ingot to produce blank; rolling blank; providing controlled cooling and winding of rolled product into rolls; finishing hot rolling at temperature of 1,000-1,0500C; providing controlled accelerated cooling to 880-9000C with following cooling in air to temperature of up to 3000C. Method allows additional spheroidizing annealing process to be avoided.
EFFECT: provision for producing of rolled bars of structure enabling advantageous conditions for cold bulk pressing of compound shape fastening parts and improved characteristics of hardenability of steel.
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| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING OF SPHEROIDIZED ROLLED BARS FROM BORON STEEL FOR COLD BULK PRESSING OF HIGH-STRENGTH FASTENING PARTS | 2003 |
|
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| ROUND-PROFILED ROLLED IRON FROM MEDIUM-CARBON HIGH-PLASTICITY STEEL FOR COLD DIE FORGING OF HIGH-STRENGTH ESPECIALLY HIGH-PROFILED FASTENING MEMBERS | 2003 |
|
RU2249629C1 |
| METHOD OF PRODUCTION OF CONTINUOUSLY CAST BLANK OF BARS FROM BORON-CONTAINING STEEL FOR COLD DIE FORGING OF HIGH-STRENGTH FASTENERS | 2003 |
|
RU2237728C1 |
| ROUND MERCHANT SHAPES MADE FROM ALLOYED STEEL FOR COLD DIE FORGING OF INTRICATE-SHAPE PROFILES FOR HIGH-STRENGTH FASTENING PARTS | 2003 |
|
RU2262539C1 |
| ROUND-PROFILED ROLLED IRON FROM LOW-CARBON STEEL FOR COLD DIE FORGING OF HIGH-STRENGTH ESPECIALLY HIGH-PROFILED FASTENING MEMBERS | 2003 |
|
RU2249628C1 |
