Steel 14KH17N2 (ЭИ268)
Steel 16Х12В2ФТаР (EC181)
Steel 17Х18Н9 (2Х18Н9)
Steel 15Х16Н2АМ (EP479)
Steel 14Х20Н25В5МБ (LZhT)
Steel 14Х17Н2 (ЭИ268)
Steel 13Х16Н3М2АФ (VNS57)
Steel 12Х18Н9 (Х18Н9)
Steel 12Х12М1БФР (EP450)
Steel 11Х17Н
Steel 10Х25Н6АТМФ
Steel 10Х20Н33Б
10X18H9 steel
10X18N10T steel (EP502)
Steel 10Х12Н3М2БФ
Steel 10Х12Н20Т2 (EP452)
09Cr18Ni9 steel
Steel 09X17N (ChS130)
Steel 08Х20Н12АБФ
Steel 08X19H12TF
Steel 08Х16Н11М3
45X25H35BS steel
Steel CS 116-ID (EP753U-ID)
Steel 9Х13Н6ЛК4 (ЭИ928)
Steel 80X20NS (EP992)
Steel 50X25H35S2B
Steel 50Х25Н35В5К15С
Steel 50Х20Н35С2Б
Steel 50Kh15MFasch
Steel 4Х13Н6ЛВФ (EP354)
Steel 45Х28Н49В5С
Steel 08Cr13 (EI496)
Steel 45X25H20C2
Steel 45X25H20S
Steel 35Х24Н24Б
Steel 32Х13Н6К3М2БДЛТ (VNS-32; SES1)
Steel 30X23H7S
Steel 23Х15Н5АМ3 (18Х15Н6АМ3; VNS-9)
Steel 20Х13Н2ДМЮФ (DI96)
Steel 20X13 (02X13)
Steel 20Х12НМВБФАР (ЧС139)
Steel 02N15K10M5F5
Steel 03N18K8M3TU (ЗИ25)
Steel 03N18K1M3TU (ZI80)
Steel 03N17K10V10MT (EP836)
Steel 03N15K10M5F5 (EK169)
Steel 03N14Cr5M3Tu (OMC-2)
Steel 03N14H5M3T (EP777)
Steel 03N10Cr12D2T
Steel 02X8H22S6 (EP794)
Steel 02N18M3K3T (EK165; ČS101)
Steel 03N18K9M5TU (ChS4)
Steel 01N18K9M5T (EP637U)
Steel 015Cr18Nr15P30 (EP168B)
Steel 015Х18Н15Р26 (EP168А)
Steel 015Cr18Nr15P22 (EP167B)
Steel 015Cr18Nr15P17 (EP167A)
Steel 015Х18Н15Р13 (EP166Б)
Steel 015Cr18Nr15P09 (EP166A)
Steel 015N18M4TU (EP989; ČS5U)
Steel 015N18K13M5TU (EP948; ČS35)
Steel 05X12H2M
Steel 07Х25Н16АГ6Ф (EP750)
Steel 07Х15Н30В5М2 (ChS81)
Steel 07Х12НМФБ (ChS80)
Steel 07Х12НМБФ (EP609)
Steel 06Х16Н15М3БР (EP172)
Steel 06Х16Н15М2Г2ТФР (ЧС68)
Steel 06Х15Н6МВФБ (VNS16)
Steel 06X13H7D2 (EP898)
Steel 05Х12Н5К14М5ТВ (EP695)
Steel 08Х14Н2К3МФБ (EK93; VNS-51)
Steel 04Х16Н11М3Т (DI95)
Steel 03Х17Н14М3 (ЗИ66)
Steel 03Х13Н5М5К9 (VNL-6)
Steel 03Х12Н8МТю (ЗИ37)
Steel 03Х12Н8К5М2ТЮ (ЗИ90)
Steel 03Х11Н10М2Т1 (EP679)
Steel 03Х11Н10М2Т (EP678; VNS-17)
Steel 03N18M4TU (ChS25)
Steel 03N18M3TU (ChS5)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 14Х17Н2 |
| Designation GOST Latin | 14X17H2 |
| Transliteration | 14H17N2 |
| The chemical elements | 14Cr17Н2 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭИ268 |
| Designation GOST Latin | EI268 |
| Transliteration | EhI268 |
| The chemical elements | - |
Description
14KH17N2 steel is used: for the manufacture of blades, disks, shafts, bushings, flanges, fasteners and other components; parts of compressor machines running on nitrous gas; parts operating in aggressive environments and temperatures in chemical and other industries; shaped castings and castings in investment casting for aircraft industry group I — loaded items with the specific requirements for density and mechanical properties: high load brackets, sealed the housing, the frames of gyroscopes, stabilizers, etc. and group II — non-loaded and lightly loaded parts: rings flanges, fittings, leaking instrument cabinets, etc.
Note
Steel corrosion resistant, heat resistant martensite-ferritic class.
The recommended maximum operating temperature for a long time +400 °C.
The temperature of beginning of intensive scaling in air +800 °C.
The best corrosion resistance steel has, after quenching with high vacation.
Standards
| Name | Code | Standards |
|---|---|---|
| Sheets and stripes | В23 | GOST 103-2006 |
| Sectional and shaped rolling | В22 | GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Metal forming. Forgings | В03 | GOST 25054-81, OST 5Р.9125-84, TU 14-1-1530-75, ST ЦКБА 010-2004 |
| Sheets and stripes | В33 | GOST 4405-75, GOST 5582-75, GOST 7350-77, TU 14-1-2186-77, TU 14-132-179-89 |
| Classification, nomenclature and general norms | В30 | GOST 5632-72 |
| Sectional and shaped rolling | В32 | GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, TU 14-1-2257-77, TU 14-1-2972-80, TU 14-1-3564-83, TU 14-1-377-72, TU 14-1-3957-85, TU 14-1-5038-91, TU 14-11-245-88 |
| Castings, steel | В82 | OST 1 80059-83 |
| Classification, nomenclature and general norms | В20 | OST 1 90005-91 |
| Castings with special properties (cast iron and steel) | В83 | OST 1 90090-79 |
| Bulls. Blanks. Slabs | В21 | OST 1 90176-75 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90, OST 95-10-72, OST 1 90161-74 |
| Welding and cutting of metals. Soldering, riveting | В05 | OST 95 10441-2002 |
| Thermal and thermochemical treatment of metals | В04 | STP 26.260.484-2004, ST ЦКБА 016-2005 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | Al | V | Ti | Mo | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OST 1 90090-79 | 0.05-0.1 | ≤0.025 | ≤0.025 | 0.3-0.8 | 15-18 | 0.8-1.5 | 2.8-3.8 | The rest | ≤0.3 | ≤0.05 | ≤0.1 | ≤0.05 | ≤0.05 | ≤0.2 | ≤0.2 |
| GOST 5632-72 | 0.11-0.17 | ≤0.025 | ≤0.03 | ≤0.8 | 16-18 | ≤0.8 | 1.5-2.5 | The rest | ≤0.3 | - | - | ≤0.2 | ≤0.2 | ≤0.3 | ≤0.2 |
Fe is the basis.
According to GOST 5632-72 the chemical composition is given for steel 14Х17Н2.
According to OST 1 90090-79 the chemical composition is given for steel 14Х17Н2Л (ЭИ268Л). In steel, the nitrogen content is up to 0.070%.
According to TU 14-1-2186-77 for steel smelted with electroslag remelting the content of S ≤ 0.015%.
According to GOST 5632-72 the chemical composition is given for steel 14Х17Н2.
According to OST 1 90090-79 the chemical composition is given for steel 14Х17Н2Л (ЭИ268Л). In steel, the nitrogen content is up to 0.070%.
According to TU 14-1-2186-77 for steel smelted with electroslag remelting the content of S ≤ 0.015%.
Mechanical characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | d | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|---|---|---|
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) | |||||||||
| - | 300 | 930-950 | 1260-1280 | ≥16 | - | 59-61 | - | 400-444 | - |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | |||||||||
| - | - | - | 830-1030 | - | - | - | - | 229-321 | 21-30 |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥215 | ≥58 | - | ≥90 | - | - | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) | |||||||||
| - | 400 | 980-1050 | 1290-1330 | 16-17 | - | 60-62 | - | 388-444 | - |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | |||||||||
| - | - | - | 930-1130 | - | - | - | - | 255-363 | 27-32 |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥145 | ≥70 | - | ≥92 | - | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil with 950-1040 °C + Vacation, cooling in oil or air (sample) | |||||||||
| ≤100 | 600-650 | - | - | - | - | - | - | 229-285 | 20-29 |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) | |||||||||
| - | 500 | 970-1000 | 1110-1200 | 14-15 | - | ≥60 | - | 363-388 | - |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥98 | ≥75 | - | ≥88 | - | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil with 950-1040 °C + Vacation, cooling in oil or air (sample) | |||||||||
| ≤100 | 275-350 | - | - | - | - | - | - | - | 35-43 |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥59 | ≥80 | - | ≥90 | - | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil with 950-1040 °C + Vacation, cooling in oil or air (sample) | |||||||||
| ≤60 | 275-350 | - | ≥1079 | ≥10 | - | - | ≥392 | 321-415 | - |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥29 | ≥80 | - | ≥90 | - | - | - |
| Billet (forgings) OST 95-10-72. Quenching in oil with 950-1040 °C + Vacation, cooling in oil or air (sample) | |||||||||
| ≤100 | 600-680 | ≥540 | ≥686 | ≥15 | - | ≥40 | ≥588 | 207-285 | - |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | ≥20 | ≥80 | - | ≥88 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| ≤60 | 275-370 | ≥834 | ≥1080 | ≥10 | - | ≥25 | ≥490 | 331-388 | 37-42.5 |
| Strain state. The rate of deformation of 2.5 mm/min. | |||||||||
| - | - | - | 20 | 68 | - | 80 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| ≤60 | 560-600 | ≥735 | ≥931 | ≥10 | - | ≥30 | ≥490 | 277-331 | 30-37 |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 680-690 | 870-890 | ≥16 | - | 52-55 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| ≤60 | 680-700 | ≥568 | ≥784 | ≥14 | - | ≥50 | ≥588 | 229-285 | 22.5-31 |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 630-650 | 780 | 12-15 | - | 47-53 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| 60-100 | 680-700 | ≥540 | ≥687 | ≥12 | - | ≥43 | ≥490 | 229-285 | 22.5-31 |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 610-630 | 730-760 | 11-13 | - | 50-53 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| 100-300 | 680-700 | ≥540 | ≥687 | ≥12 | - | ≥40 | ≥392 | 229-285 | 22.5-31 |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 600-630 | 730-750 | 11-12 | - | ≥45 | - | - | - |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Annealing at 680-700 °C (20 h exposure), air cooling with the furnace | |||||||||
| ≤60 | - | ≥490 | ≥735 | ≥14 | - | ≥50 | ≥588 | 240-260 | 25-28 |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 500-540 | 560-610 | ≥15 | - | 54-56 | - | - | - |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in oil with the 950-975 °C + Vacation at 275-350 °C, air cooling | |||||||||
| - | - | 1080-1370 | ≥10 | - | - | - | - | - | |
| Forgings of disks with a diameter of 700 mm and a height of 30-80 mm. Annealing with two hypothermia 200-230 °C and 140-180 °C. Quenching in oil 960-980 °C + Vacation at 640-670 °C (samples tangential). At 20 °C HB=285 | |||||||||
| - | - | 280-310 | 330-340 | 28-30 | - | 83-84 | - | - | - |
| The casting and the ceramic mold. Quenching in oil or a solution of liquid glass with 1040-1060 °C + Vacation at 540-560 °C (3 hours), air cooling | |||||||||
| - | - | ≥736 | ≥932 | - | ≥8 | ≥20 | ≥245 | 229-321 | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) + Vacation at 600 °C (exposure 3-6 h). At 20 °C NV=269-302 | |||||||||
| - | - | 680-710 | 860-880 | 19-22 | - | 60-63 | - | - | - |
| The casting and the ceramic mold. Quenching in oil or a solution of liquid glass with 1040-1060 °C + Vacation at 670-690 °C (3 hours), air cooling | |||||||||
| - | - | ≥638 | ≥834 | - | ≥8 | ≥20 | ≥245 | 229-321 | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) + Vacation at 600 °C (exposure 3-6 h). At 20 °C NV=269-302 | |||||||||
| - | - | 620-640 | ≥720 | ≥16 | - | 65-67 | - | - | - |
| Forgings for parts resistant to the ICC. Quenching in oil or air with 970-1020 °C + Vacation at 620-670 °C, air cooling | |||||||||
| ≤60 | - | ≥540 | ≥687 | ≥12 | - | ≥60 | ≥590 | 228-277 | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) + Vacation at 600 °C (exposure 3-6 h). At 20 °C NV=269-302 | |||||||||
| - | - | 580-590 | 670-680 | 14-15 | - | 63-64 | - | - | - |
| Forgings for parts resistant to the ICC. Quenching in oil or air with 970-1020 °C + Vacation at 620-670 °C, air cooling | |||||||||
| 100-300 | - | ≥540 | ≥687 | ≥12 | - | ≥40 | ≥393 | 228-277 | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) + Vacation at 600 °C (exposure 3-6 h). At 20 °C NV=269-302 | |||||||||
| - | - | 510 | 550-570 | 17-18 | - | 68-70 | - | - | - |
| Forgings for parts resistant to the ICC. Quenching in oil or air with 970-1020 °C + Vacation at 620-670 °C, air cooling | |||||||||
| 60-100 | - | ≥540 | ≥687 | ≥12 | - | ≥50 | ≥492 | 228-277 | - |
| Rod. Annealing at 760-780 °C (exposure 2 hours), cooled with furnace + Quenching in oil with the 950-975 °C (aging 1 HR) + Vacation at 600 °C (exposure 3-6 h). At 20 °C NV=269-302 | |||||||||
| - | - | ≥430 | ≥460 | ≥20 | - | ≥81 | - | - | - |
| Forgings. Quenching in oil or air with 970-1000 °C + Vacation at 600-650 °C, air cooling | |||||||||
| ≤60 | - | ≥638 | ≥736 | ≥12 | - | ≥45 | ≥600 | 241-321 | - |
| 100-300 | - | ≥638 | ≥736 | ≥10 | - | ≥35 | - | 241-321 | - |
| 60-100 | - | ≥638 | ≥736 | ≥11 | - | ≥40 | ≥500 | 241-321 | - |
| Forgings. Quenching in oil or air with 970-1000 °C + Vacation at 300-350 °C, air cooling | |||||||||
| ≤300 | - | - | - | - | - | - | - | 321-388 | - |
| Forgings. Quenching in oil from 980-1020 °C + Vacation at 680-700 °C, air cooling | |||||||||
| 60-100 | - | ≥637 | ≥784 | ≥12 | - | ≥30 | ≥490 | - | - |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in oil 1000-1030 °C + Vacation at 620-660 °C, air cooling | |||||||||
| - | ≥635 | ≥835 | ≥16 | - | ≥55 | ≥784 | - | - | |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in oil with 975-1040 °C + Vacation at 275-350 °C, air cooling | |||||||||
| - | ≥835 | ≥1080 | ≥10 | - | ≥30 | ≥490 | - | - | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil with 975-1040 °C + Vacation, air cooling | |||||||||
| 275-350 | ≥850 | ≥1100 | ≥10 | - | ≥30 | ≥490 | - | - | |
| 680-700 | ≥600 | ≥750 | ≥18 | - | ≥45 | ≥686 | - | - | |
| Forming at OST 1 90176-75. Quenching in oil with 1010-1030 °C + Vacation at 670-690 °C, air cooling | |||||||||
| - | ≥638 | ≥834 | ≥16 | - | ≥55 | ≥784 | 255-302 | - | |
| Forming at OST 1 90176-75. Quenching in oil with 975-1040 °C + Vacation at 275-350 °C, air cooling | |||||||||
| - | ≥834 | ≥1079 | ≥10 | - | ≥30 | ≥490 | 321-388 | - | |
Description mechanical marks
| Name | Description |
|---|---|
| Section | Section |
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| d | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Physical characteristics
| Temperature | Е, ГПа | r, кг/м3 | l, Вт/(м · °С) | R, НОм · м | a, 10-6 1/°С | С, Дж/(кг · °С) |
|---|---|---|---|---|---|---|
| 0 | 193 | 7750 | 21 | 720 | - | - |
| 20 | 197 | 7750 | 209 | 720 | - | - |
| 300 | 164 | - | 24 | 890 | 118 | 462 |
| 500 | 148 | - | 25 | 1040 | 111 | - |
| 600 | 133 | - | 26 | 1110 | 113 | - |
| 100 | - | - | 22 | 780 | 98 | - |
| 200 | - | - | 23 | 840 | 106 | - |
| 400 | - | - | 24 | 990 | 11 | - |
| 700 | - | - | 27 | 1130 | 11 | - |
| 800 | - | - | 28 | 1160 | 107 | - |
| 900 | - | - | 30 | 1170 | 114 | - |
| 1000 | - | - | - | 1180 | 114 | - |
| 1200 | - | - | - | - | 115 | - |
A description of the physical symbols
| Name | Description |
|---|---|
| Е | The normal elasticity modulus |
| G | Modulus of elasticity shear torsion |
| r | Density |
| l | Coefficient of thermal conductivity |
| R | UD. the resistivity |
| С | Specific heat |
Technological properties
| Name | The value |
|---|---|
| Weldability | Difficult weldability. Method of welding RDS, ARDS. Weld in the heat affected zone have a lowered resistance to the ICC and General corrosion; therefore, after welding is necessary to leave at 680-700 °C for 30-60 min. |
| Propensity to temper brittleness | Inclined. |
| Forging temperature | Start - 1250 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air. |
| Workability by cutting | In the hardened and tempered condition when HB 330 Kn TV.SPL.=0,4 Kn b.St.=0,3. To improve the machinability and the hardness HB ≤ 229, the workpiece is subjected to annealing at 620-670 °C for 4-8 h with air cooling. |
| Features of heat treatment | Martensite steel-ferritic class is used in the hardened and tempered condition. To achieve maximum strength steel products 14KH17N2 are subjected to hardening with 975 - 1040 °C, holding at the thickness up to 10 mm - 15 min, more than 10 mm - 15 min + 1 min per 1 mm max thickness cooling oil. Vacation at 275 - 350 °C for 2 h + 1 min 1 mm max thickness cooling - air. The heating of the parts (workpieces) in the temperature range from 500 °C to 800 °C must be carried out at a speed of not more than 200 °C per hour. In the temperature range 750 - 800 °C it is necessary to give exposure to the full heating of the charge. Further heating to the quenching temperature produced by the furnace. For parts with thickness (diameter) up to 120 mm the rate of heating is not limited and aging at a temperature of from 750 °C to 800 °C is not possible. To ensure a medium level of strength after quenching, the product is subjected to vacation at 560-650 °C for 1 hour + 1 min per 1 mm maximum material thickness, cooling air. Heat treatment this is the product of the tendency to intergranular corrosion. To achieve high corrosion resistance of steel products 14KH17N2 after quenching is subjected to vacation at 680-700 °C for 30 min + 1 min per 1 mm, the maximum thickness of the material. The heating temperature for quenching for products made from steel sheet 14KH17N2, down to 950-975 °C. Welded steel products 14KH17N2 have reduced corrosion resistance in the heat affected zone. Therefore, they need to be leave at 680-720 °C. the exposure Time -30 min + 1 min per 1 mm, the maximum thickness of the product. To reduce the residual magnetic induction in the magnetic circuit of the electromagnets of the details (blank) should be subjected to prolonged annealing. Parts included in friction and sealing shutter valves, can be subjected to surface hardening with heating by high frequency currents (HFC) with the aim of improving hardness while maintaining high mechanical properties in the core part. Surface hardening with heating HDTV applies to parts of thickness (diameter) of not less than 15 mm and is made only after a preliminary heat treatment improves the hardness to HRC 22-31. Podolka parts HDTV are only allowed in the absence of the requirements of the steel resistance to intergranular corrosion. Prolonged annealing of workpieces is applied to reduce the residual magnetic induction in the magnetic circuit of the electromagnets and provides magnetic properties to steel grade 14KH17N2 the smallest coercive force HC equal to 0.1 ka/m at a residual induction RF Of 0.5 T, the saturation induction Bs of 1.5 T at the maximum coercive force Nm 20 ka/m. Welded assemblies and steel products 14KH17N2 for improving the corrosion resistance is subjected to annealing regime: heat to 680-700 °C, exposure - 2-3 h, air cooling in the absence of the requirements of the resistance to the ICC; heat to 680-700 °C, exposure - 3-5 h air cooling when the demand resistance to the ICC. |
