Steel 07KH16N6 (ЭП288; SN-2A; Х16Н6)
Steel 10Х18Н5Г9АС4 (EP492; VNS-3)
Steel 10Х32Н4Д (EP529)
Steel 10Х17Н5М2 (EP405)
Steel 10Х17Н13М3Т (ЭИ432)
Steel 10Х17Н13М2Т (ЭИ448)
Steel 10Х14Г14Н3 (DI-6)
Steel 10Х14АГ15 (DI-13)
Steel 09Cr17N7Yu1 (0Cr17N7Yu1)
Steel 09Х17Н7Ю (ЭИ973)
Steel 09Х16Н4Б (EP56; 1Х16Н4Б)
Steel 09Х15Н8Ю1 (09Х15Н8Ю; ЭИ904)
Steel 08ХГСДП
Steel 08Х22Н6Т (EP53)
Steel 08Х21Г11А6 (VNS-53)
Steel 08Х20Н4АГ10 (НН-3)
Steel 08X18Th (DI-77)
Steel 08Х18Н7Г10АМ3 (08Х18Н7Г10АМ3С2)
Steel 08Cr18Ni5G12AB (HH-3B)
Steel 08X18H5G11BAF (HH-3BF)
Steel 08X18H4G11AF (HH-3F)
Steel 08Cr18Ni12T (0Cr18Ni12T)
Steel 08X18H12B (EI402)
Steel 08Х18Г8Н2Т (KO-3)
Steel 08Cr17Ni6T (DI-21)
Steel 20Х13Н4Г9 (ЭИ100)
Cr17N14M3T steel
Cr17N14M2T steel
Steel 95X18 (EI229)
Steel 95X13M3K3B2F (EP766)
Steel 65X13
Steel 40X13 (4X13)
Steel 30X13 (3X13)
Steel 26Х14Н2 (EP208)
Steel 25X17H2B
Steel 25X17H2 (EP407)
Steel 25Х13Н2 (ЭИ474)
Steel 20X17H2 (2X17H2)
Steel 08Х17Н15М3Т (ЭИ580)
18X13H3 steel
Steel 15Х18Н12С4ТЮ (ЭИ654; 2Х18Н12С4ТЮ)
Steel 15Х17АГ14 (ЭП213)
Steel 13Х18Н10Г3С2М2 (ЗИ98)
Steel 12Х21Н5Т (ЭИ811; 1Х21Н5Т)
Steel 12Х18Н13АМ3 (EP878)
Steel 12X18H10E (EP47)
Steel 12Х17Н8Г2С2МФ (ЗИ126)
Steel 12X17G9AN4 (EI878)
Steel 12Х13Г12АС2Н2 (DI50)
Steel 11Х13Н3
Steel 03Х16Н15М3 (ЭИ844)
04X15ST steel
Steel 04X17H10M2
Steel 03Х23Н6 (ЗИ68)
Steel 03Х22Н6М2 (ЗИ67)
Steel 03Х21Н25М5ДБ
Steel 03Х21Н21М4ГБ (ЗИ35)
Steel 03Х20Н45М5Б (ChS32; 03ХН45МБ)
Steel 03Х18Н12Т (000Х18Н12Т)
Steel 03Х18Н12 (000Х18Н12)
Steel 03X18N11 (000X18N11)
Steel 03Х17Н14М2
Steel 03X17AN9 (EK177)
04X17T steel
Steel 03Х15Н35Г7М6Б (EP855)
Steel 03X13AG19 (ChS36)
Steel 03Х12Н10МТР (EP810; VNS-25)
Steel 03Х12К10М6Н4Т (EP927)
Steel 03Х11Н10М2Т2 (EP853)
Steel 02Х25Н22АМ2 (ChS108)
Steel 02Х21Н25М5ДБ (EC5)
Steel 02Х21Н21М4Г2Б (ЗИ69)
02Cr18Ni11 steel
Steel 02X17H14M3
Steel 015Х16Н15М3
Steel 06Х14Н6Д2МБТ (EP817)
Steel 08Х17Н13М2Т (0Х17Н13М2Т; ЭИ448)
Steel 08Х10Н20Т2 (0Х10Н20Т2)
Steel 08Х10Н16Т2 (0Х10Н16Т2)
Steel 07X21G7AN5 (EP222)
Steel 07X18N10P (EP287)
Steel 07Х16Н6 (EP288; СН-2А; Х16Н6)
Steel 07Х16Н4Б
Steel 07Х15Н7М2 (EP35; СН-4; Х15Н8М2Ю)
Steel 07Х16Н6
Steel 06X18H11 (EI684)
06X15H4DM steel
Steel 08Х17Н5М3 (ЭИ925)
06X13H4DM steel
Steel 06Х12Н3Д
Steel 06Х12Н3Д (08Х12Н3Д)
05KhGB steel
Steel 05Х20Н15АГ6 (ChS109)
Steel 05Х12Н9М2С3 (EP821)
Steel 05Х12Н2К3М2АФ (VNS-40)
Steel 04Х32Н8 (EP535)
Steel 04Х25Н5М2 (DI62)
Steel 04X19MAFT
Steel 04X18H10 (EI842)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 07Х16Н6 |
| Designation GOST Latin | 07X16H6 |
| Transliteration | 07H16N6 |
| The chemical elements | 07Cr16Н6 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭП288 |
| Designation GOST Latin | EP288 |
| Transliteration | EhP288 |
| The chemical elements | - |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | СН-2А |
| Designation GOST Latin | CH-2A |
| Transliteration | SN-2A |
| The chemical elements | СН-2 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | Х16Н6 |
| Designation GOST Latin | X16H6 |
| Transliteration | H16N6 |
| The chemical elements | Cr16Н6 |
Description
07KH16N6 steel is used: for the manufacture of products, working in atmospheric conditions, acetic acid and other saline environments; elastic elements; welding wire used for welding parts and welding of steel structures in energy engineering; welding electrodes; power locks, designed for locking of hatches of aircraft and helicopters; bolts, flanges, screws, nuts and body parts for aircraft; high-strength parts operating for a long period of time at temperatures up to +500−550 °C.
Note
Stainless steel austenitic-martensitic class, has no Delta ferrite.
Standards
| Name | Code | Standards |
|---|---|---|
| Metal forming. Forgings | В03 | GOST 25054-81, TU 14-1-1530-75, TU 14-1-2902-80, TU 14-1-2918-80 |
| Sheets and stripes | В33 | GOST 5582-75, GOST 7350-77, TU 14-1-1558-76, TU 14-1-2375-77, TU 14-1-2476-78, TU 14-1-763-73 |
| Classification, nomenclature and general norms | В30 | GOST 5632-72 |
| Sectional and shaped rolling | В32 | GOST 5949-75, TU 14-1-1660-76, TU 14-1-205-72, TU 14-136-331-89, TU 14-1-759-73, TU 14-11-245-88, TU 14-1-759-92 |
| Classification, nomenclature and general norms | В20 | OST 1 90005-91 |
| Bulls. Blanks. Slabs | В21 | OST 1 90176-75 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90, TU 14-1-1213-75, TU 14-1-1214-75 |
| Thermal and thermochemical treatment of metals | В04 | STP 26.260.484-2004 |
| Welding and cutting of metals. Soldering, riveting | В05 | TU 14-1-997-74, TU 14-1-997-2012 |
| Pipes steel and connecting parts to them | В62 | TU 14-3-1334-85 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | V | Ti | Mo | Nb | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-2902-80 | 0.05-0.09 | ≤0.02 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.7 | 5-8 | The rest | ≤0.2 | ≤0.2 | ≤0.05 | ≤0.3 | ≤0.15 | ≤0.2 |
| TU 14-1-997-74 | 0.05-0.09 | ≤0.02 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.8 | 5-8 | The rest | ≤0.2 | - | - | - | - | - |
| TU 14-1-1660-76 | 0.05-0.09 | ≤0.015 | ≤0.03 | ≤0.8 | 15.5-17.5 | ≤0.7 | 5-8 | The rest | ≤0.2 | ≤0.2 | ≤0.05 | ≤0.2 | ≤0.15 | ≤0.2 |
| TU 14-1-1558-76 | 0.05-0.09 | ≤0.02 | ≤0.035 | - | 15.5-17.5 | ≤0.8 | 5-8 | The rest | - | - | - | - | - | - |
| TU 14-1-2375-77 | 0.05-0.09 | ≤0.02 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.7 | 5-8 | The rest | ≤0.3 | - | - | - | - | - |
| GOST 5632-72 | 0.05-0.09 | ≤0.02 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.8 | 5-8 | The rest | ≤0.3 | ≤0.2 | ≤0.05 | ≤0.3 | - | ≤0.2 |
| TU 14-1-759-92 | 0.05-0.09 | ≤0.015 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.7 | 5-8 | The rest | ≤0.3 | - | - | - | - | - |
| TU 14-1-2918-80 | 0.05-0.09 | ≤0.02 | ≤0.035 | ≤0.8 | 15.5-17.5 | ≤0.7 | 5-8 | The rest | ≤0.3 | ≤0.2 | ≤0.05 | ≤0.3 | - | ≤0.2 |
Fe is the basis.
According to TU 14-1-1660-76 the chemical composition is given for steel grade 07H16N6-III. In steel for limited use, the content of residual elements should not exceed: tungsten, vanadium, molybdenum, copper - 0.20% each, niobium - 0.15%, titanium - 0.050%. The content of residual elements is allowed not to be determined.
According to TU 14-1-2902-80 and TU 14-1-2918-80 the chemical composition is given for 07Х16Н6 and 07Х16Н6-Ш.
According to TU 14-1-2918-80, the sulfur content in steel EP288-III, smelted by electroslag remelting, should not exceed 0.015%. At the request of the consumer the steel grade EP288 and EP288-SH are supplied with a phosphorus content of not more than 0.025%.
According to TU 14-1-1558-76 the chemical composition is given for steel grade 07H16N6. If the other requirements of the specifications are satisfied, ready deviations from the chemical composition standards and residual elements within the limits of GOST 5632 are allowed in the finished thin-sheet steel.
According to TU 14-1-2375-77, the chemical composition is given for steel grades 07Х16Н6 and 07Х16Н6-Ш. If the requirements of TU are met, the following chemical composition tolerances are allowed: for chromium minus 0.50%; for silicon and manganese, plus 0.020% of each.
According to TU 14-1-1213-75, the mass fraction of residual elements should not exceed: copper, vanadium, tungsten - 0.20% each for limited use in steel 07Х16Н6 (ЭП288) and 07Х16Н6-Ш (ЭП288-Ш), molybdenum - 0 , 30%, niobium 0.15%, titanium 0.050%. The determination of the mass fraction of the residual elements is not allowed. The steel is marked in this case: 07Х16Н6У (ЭП288У) and 07Х16Н6У-Ш (ЭП288У-Ш).
According to TU 14-1-2476-78, the chemical composition is given for steel grades 07Х16Н6, 07Х16Н6-ВД and 07Х16Н6-Ш. In the finished product, deviations in chemical composition are allowed in accordance with GOST 5632. For limited use in steel 07Х16Н6 and 07Х16Н6-Ш the content of residual elements in steel should not exceed: copper, vanadium, tungsten 0.20% each, molybdenum 0.30 %, niobium - 0.15%, titanium - 0.050%. The content of the residual elements can not be determined. In this case the steel is marked with 07Х16Н6У (ЭП288У), 07Х16Н6У-Ш (ЭП288У-Ш).
According to TU 14-1-759-92 the chemical composition is given for steel grade 07H16N6-SH. Allowed, subject to all the requirements of the technical specification, the chromium deflection is -0.50%. For limited use in steel 07H16N6-SH, the content of residual elements in steel should not exceed: copper, vanadium, tungsten 0.20% each, molybdenum 0.30%, niobium 0.15%, titanium 0.050%. The content of the residual elements can not be determined. In this case the steel is marked with 07Х16Н6У-Ш (ЭП288У-Ш).
According to TU 14-1-1660-76 the chemical composition is given for steel grade 07H16N6-III. In steel for limited use, the content of residual elements should not exceed: tungsten, vanadium, molybdenum, copper - 0.20% each, niobium - 0.15%, titanium - 0.050%. The content of residual elements is allowed not to be determined.
According to TU 14-1-2902-80 and TU 14-1-2918-80 the chemical composition is given for 07Х16Н6 and 07Х16Н6-Ш.
According to TU 14-1-2918-80, the sulfur content in steel EP288-III, smelted by electroslag remelting, should not exceed 0.015%. At the request of the consumer the steel grade EP288 and EP288-SH are supplied with a phosphorus content of not more than 0.025%.
According to TU 14-1-1558-76 the chemical composition is given for steel grade 07H16N6. If the other requirements of the specifications are satisfied, ready deviations from the chemical composition standards and residual elements within the limits of GOST 5632 are allowed in the finished thin-sheet steel.
According to TU 14-1-2375-77, the chemical composition is given for steel grades 07Х16Н6 and 07Х16Н6-Ш. If the requirements of TU are met, the following chemical composition tolerances are allowed: for chromium minus 0.50%; for silicon and manganese, plus 0.020% of each.
According to TU 14-1-1213-75, the mass fraction of residual elements should not exceed: copper, vanadium, tungsten - 0.20% each for limited use in steel 07Х16Н6 (ЭП288) and 07Х16Н6-Ш (ЭП288-Ш), molybdenum - 0 , 30%, niobium 0.15%, titanium 0.050%. The determination of the mass fraction of the residual elements is not allowed. The steel is marked in this case: 07Х16Н6У (ЭП288У) and 07Х16Н6У-Ш (ЭП288У-Ш).
According to TU 14-1-2476-78, the chemical composition is given for steel grades 07Х16Н6, 07Х16Н6-ВД and 07Х16Н6-Ш. In the finished product, deviations in chemical composition are allowed in accordance with GOST 5632. For limited use in steel 07Х16Н6 and 07Х16Н6-Ш the content of residual elements in steel should not exceed: copper, vanadium, tungsten 0.20% each, molybdenum 0.30 %, niobium - 0.15%, titanium - 0.050%. The content of the residual elements can not be determined. In this case the steel is marked with 07Х16Н6У (ЭП288У), 07Х16Н6У-Ш (ЭП288У-Ш).
According to TU 14-1-759-92 the chemical composition is given for steel grade 07H16N6-SH. Allowed, subject to all the requirements of the technical specification, the chromium deflection is -0.50%. For limited use in steel 07H16N6-SH, the content of residual elements in steel should not exceed: copper, vanadium, tungsten 0.20% each, molybdenum 0.30%, niobium 0.15%, titanium 0.050%. The content of the residual elements can not be determined. In this case the steel is marked with 07Х16Н6У-Ш (ЭП288У-Ш).
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC |
|---|---|---|---|---|---|---|---|
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 | |||||||
| - | - | 1080-1370 | - | - | - | 311-388 | 34-41 |
| 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 water or air with 1030-1070 °C | |||||||
| - | - | ≤1180 | ≥20 | - | - | - | - |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing in air 960-990 °C cold treatment at minus 70 °C for 2 h+ Vacation at 350-400 °C (aging for 1 h), air cooling | |||||||
| ≥835 | ≥1080 | ≥12 | - | - | - | - | |
| Hot rolled sheet (2.0 to 3.9 mm) and cold rolled (0.8-3.0 mm) steel TU 14-1-1558-76 in the delivery condition. Quenching in water or air with 1040-1060 °C | |||||||
| - | ≥1275 | ≥20 | - | - | - | - | |
| Hot rolled sheet (2.0 to 3.9 mm) and cold rolled (0.8-3.0 mm) steel TU 14-1-1558-76. Hardening in air, 970-990 °C + cold Treatment at minus 70±5 °C (aging for 2 h±10 min) or at minus 50±5 °C (exposure for 4 h±10 min) + Vacation at 350-400 °C (aging 1 HR+10 min) | |||||||
| ≥833 | ≥1079 | ≥12 | - | - | - | - | |
| Hot rolled sheet (3,0-6,0 mm) and cold rolled (1.0 to 4.0 mm) to rent in the state at rates THAT 14-1-2375-77. Hardening in air, 1030-1070 °C | |||||||
| ≤390 | ≤1180 | ≥20 | - | - | - | - | |
| Hot rolled sheet (3,0-6,0 mm) and cold rolled (1.0 to 4.0 mm) steel on the other 14-1-2375-77. Normalization with 965-985 °C, air cooling + cold Treatment at -70 °C (2 hours) + Vacation at 350-425 °C (exposure for 1 hour) | |||||||
| ≥835 | ≥1080 | ≥12 | - | - | - | - | |
| Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Normalization at 1030-1050 °C, air cooling | |||||||
| - | ≤390 | ≤1180 | ≥15 | - | - | - | - |
| Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Normalization at 965-985 °C + cold Treatment at minus 70 °C for 2 h + Vacation at 415-435 °C (aging for 1 h), air cooling | |||||||
| ≥835 | ≥1080 | ≥10 | - | - | - | - | |
| Cold-rolled sheet (0.7 to 5.0 mm) and hot-rolled steel (3,0-6,0 mm) made of steel 07KH16N6 in the state of delivery on the other 14-1-2476-78. Quenching in water or air with 1040-1060 °C | |||||||
| - | - | ≤1177 | ≥20 | - | - | - | - |
| Cold-rolled sheet (0.7 to 5.0 mm) and hot-rolled steel (3,0-6,0 mm) made of steel 07KH16N6 on the other 14-1-2476-78. Annealing in air from 990 °C + cold Treatment at -70 °C for 2 hours + vacation at 250 °C (exposure 2 hours), air cooling | |||||||
| ≥834 | 1079 | ≥12 | - | - | - | - | |
| Cold-rolled sheet (0.7 to 5.0 mm) and hot-rolled steel (3,0-6,0 mm) made of steel 07KH16N6 on the other 14-1-2476-78. Annealing in air from 990 °C + cold treatment at -70 °C for 2 hours + Vacation at 350-400 °C (exposure for 1 hour), cooling air | |||||||
| ≥834 | ≥108 | ≥12 | - | - | - | - | |
| Forgings. Quenching in water with 975-1000 °C, followed by cold treatment at minus 70 °C, exposure for 2 hours + aged at 350-425 °C (aging for 1 h), air cooling | |||||||
| ≤1000 | ≥980 | ≥1176 | ≥12 | ≥50 | ≥680 | - | - |
| ≥885 | ≥1080 | ≥15 | ≥50 | ≥680 | - | - | |
| Bars grooved and SOS special surface finish on the other 14-1-759-92. The longitudinal samples. Normalization with 1090-1110 °C + cold Treatment at minus 70 °C±10 ° C (exposure for 2 hours ± 5 minutes) + Vacation at 375-400 °C (exposure for 1 hour ± 5 minutes), air cooling | |||||||
| ≥980 | ≥1180 | ≥12 | ≥50 | ≥686 | - | - | |
| Bars on the other 14-1-1660-76. Quenching in water with 975-1000 °C + cold Treatment at minus 70±5 °C (2 hours) + Vacation at 350-390 °C (extract 1-3 hours) | |||||||
| ≥981 | ≥1177 | ≥12 | ≥55 | ≥883 | - | - | |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in water, in air or in oil with 975-1000 °C + cold Treatment at minus 70 °C (extract 2 h) or at minus 50 °C (exposure 4 h) + Aging at 350-400 °C (aging for 1 h), air cooling | |||||||
| ≥880 | ≥1080 | ≥12 | ≥50 | ≥686 | - | - | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 980-1020 °C, cold treatment at -10 °C (exposure 2 hours) + Vacation at 180-200 °C, air cooling | |||||||
| ≥700 | ≥950 | ≥20 | ≥60 | ≥1176 | - | - | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 980-1020 °C, cold treatment at -70 °C (exposure 2 hours) + Aging at 350-380 °C, air cooling | |||||||
| ≥1000 | ≥1200 | ≥12 | ≥50 | ≥686 | - | - | |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 980-1020 °C, cold treatment at -70 °C (exposure 2 hours) + Aging at 400-450 °C, air cooling | |||||||
| ≥1050 | ≥1250 | ≥10 | ≥45 | ≥490 | - | - | |
| Forming at OST 1 90176-75. Quenching in air, water 980-1000 °C + cold Treatment at minus 70°C (2 h) or -50 °C (4 hours) + Vacation at 350-380 °C (aging 1 HR) | |||||||
| ≥981 | ≥1177 | ≥12 | ≥50 | ≥686 | - | - | |
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 |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name | The value |
|---|---|
| Macrostructure and contamination | Macrostructure of steel shall be no traces of shrinkage, delamination, foreign inclusions. The macrostructure of bars on the other 14-1-759-92 must be without voids, cracks, cracks, delamination, inclusions visible to the naked eye. The defects allowed in scores on scales GOST 10243 Central porosity, spot inhomogeneity and phase separation in the square should not exceed 1 point for each parameter. |
| Features of heat treatment | After quenching, the steel has a structure of unstable austenite with a small amount of martensite. In this state, the steel doesn't strengthen aging. Hardening as a result of ageing after pre-deformation or cold treatment products that causes the formation of martensite. Parts, components and apparatus made of nettervibration sheets, strips, extruded profiles, as well as from bars, rods and forgings, are subjected to full cycle of hardening heat treatment: a) annealing (for obtaining a structure of austenite); b) cold treatment at minus 70 °C (aging for at least 2 h, while cooling in the refrigerating chamber, the exposure time is doubled); C) aging (to achieve a specified level of properties). Products, to achieve maximum corrosion resistance, is subjected to heat treatment by mode: heating to 1000±20 °C, exposure with wall thickness up to 15 mm - 30 min; more than 15 mm - 30 min + 1-2 min per 1 mm of maximum wall thickness; cooling in water or air; cold treatment; aging at 350-380 °C, dwell time 1 hour + 1 min per 1 mm cross section; the cooling air. To obtain maximum strength characteristics of aging must be carried out at 400-480 °C, dwell time 1 hour + 1 min per 1 mm cross section, but the steel acquires the tendency to intergranular corrosion. In the hardening of products with wall thickness up to 8 mm, the cooling is carried out on the tranquil air, the products wall thickness more than 8 mm, and also products from bar and forgings are cooled in water. Slow cooling of products (with oven or in bulk) are not allowed. The gap between the operations of quenching and cold treatment should not exceed 12h. Before cold processing products shall not be subjected to heating or exposure to temperatures from 0 to minus 40 °C. cooling Time of the product from room temperature to minus 70 °C should be minimal. When obtaining low values of relative narrowing and toughness in comparison with specified in the normative documents, what is usually observed in large forgings, it is recommended obezvrezivate annealing regime: heating to 500±10 °C , exposure 30 h for sections up to 50 mm and 50 h for sections more than 50 mm. the Highest rate of bezodiazepine observed in the martensitic structure, so before bezodiazepines structure of the steel is transferred to a martensitic state by heat treatment at minus 70 °C. To obtain the desired properties after obezbolivaushee heat treatment necessary heat treatment for hardening of the regime *. When hardening heat treatment products there is an increase in their size compared to tempered as 0.3-0.5 %. To obtain a yield strength of 70-80 kg/mm2 (700-800 MPa): products used for the treatment of: a) annealing according to *; b) cold treatment at a temperature of from 0 °C to minus 10 °C for 2H; C) leave at 200 °C for 2H. For best machinability steel products 07KH16N6 subjected to double heat treatment: annealing at 760-780°, exposure is 1.5-2 hours, air cooling, leave at 650-680 °C for 1.5-2 h, air cooling. |
