ASTM B670 standarti nima?
ASTM B670 / ASME SB 670Yog'ingarchilik-qattiqlashuv uchun standart spetsifikatsiyaNikel qotishmasi (UNS N07718) Plitalar, varaqlar va tasmaYuqori haroratli xizmat uchun. Ushbu spetsifikatsiya yuqori haroratli xizmat ko'rsatish uchun yuvilgan yog'ingarchilik bilan qattiqlashtiruvchi nikel qotishmasini (UNS N07718) plastinka, qatlam va tavlangan holatda (temper) qamrab oladi.
ASTM B670 Inconel 718 Kimyoviy tarkibi va xususiyatlari:
ASTM B670 faqat bitta materialni o'z ichiga oladi:Inconel 718 (UNS N07718/2.4668). Nikel qotishmasi 718yog'ingarchilik bilan mustahkamlangan superqotishma hisoblanadi. Uning o'zi juda yaxshi yuqori haroratga chidamliligi va korroziyaga chidamliligiga ega. Eritma bilan ishlov berish va qarish bilan davolash orqali u juda yuqori harorat kuchini olishi mumkin. Shuning uchun u ko'pincha ekstremal muhitda qo'llaniladi.
- Nikel (Ni): Taxminan 50-55%
- Chromium (Cr): Taxminan 17-21%
- Temir (Fe): Taxminan 18,5% (minimal)
- Niobiy (Nb): Taxminan 4.75-5,5%
- Molibden (Mo): Taxminan 2.8-3,3%
- Titan (Ti): Taxminan 0.65-1,15%
- Alyuminiy (Al): Taxminan 0.2-0,8%
- Uglerod (C): Maksimal 0,08%
- Marganets (Mn): Maksimal 0,35%
- Kremniy (Si): Maksimal 0,35%
- Oltingugurt (S): Maksimal 0,015%
- Fosfor (P): Maksimal 0,015%
ASME SB 670 Inconel 718 Plitalar, choyshablar va chiziqlar valentlik xususiyatlari:
| Nominal qalinligi, dyuym (mm) |
Mustahkamlik chegarasi min, ksi (MPa) |
Hosildorlik (0,2% ofset) min. ksi (MPa) |
2 dyuym yoki 50 gacha cho'zilish mm (yoki 4D), min, % |
|
|---|---|---|---|---|
| Inconel 718 (UNS N07718) | ||||
| 1 tagacha.0 (25,4), shu jumladan | 180 (1241) | 150 (1034) | 12 | |
| 1.0 dan 2,25 gacha (25,4 dan 57,2 gacha), shu jumladan |
180 (1241) | 150 (1034) | 10 | |
ASTM B670 varaq, plastinka, lasan va tasma uchun amal qiladi
Umuman olganda, qalinligi 0.25 dan 6,4 mm gacha va sovuq haddeleme orqali ishlab chiqarilgan material qotishma 718 varaq sifatida belgilanadi. Va qalinligi 4,8 dan 57,2 mm gacha va issiq haddeleme orqali ishlab chiqarilgan material qotishma 718 plastinka sifatida belgilanadi. Bobin rulonli varaq yoki plastinkadir. Qotishma 718 tasmasining kengligi qotishma 718 lasannikidan ancha torroq. Uni lasanni kesish orqali olish mumkin yoki uni to'g'ridan-to'g'ri sovuq haddeleme orqali olish mumkin. Strip yuqori kuchga ega bo'lishga intiladi.
ASTM B670 O'lchovlar va toleranslar (ASTM B906)
| Har ikki chetidan 3/8 dyuym (9,5 mm) yoki undan ko'proq o'lchanadi, har qanday joyda o'lchanadigan kengligi 1 dyuym (25,4 mm) dan past bo'lgan chiziqdan tashqari. | ||||
|---|---|---|---|---|
| Belgilangan qalinligi, dyuym (mm), shu jumladan | Varaq | |||
| Issiq haddelenmiş | Sovuq haddelenmiş | |||
| 48 (1220) va undan past | 48 dan 60 gacha (1220 dan 1520 gacha), shu jumladan | 48 (1220) va undan past | 48 dan 60 gacha (1220 dan 1520 gacha), shu jumladan | |
| {0}}.018 dan 0,025 gacha (0,5 dan 0,6 gacha) | 0.003 (0.08) | 0.004 (0.10) | 0.002 (0.05) | 0.003 (0.08) |
| {0}} dan ortiq.025 dan 0,034 gacha (0,6 dan 0,9 gacha) | 0.004 (0.10) | 0.005 (0.13) | 0.003 (0.08) | 0.004 (0.10) |
| {0}} dan ortiq.034 dan 0,043 gacha (0,9 dan 1,1 gacha) | 0.005 (0.13) | 0.006 (0.15) | 0.004 (0.10) | 0.005 (0.13) |
| {0}} dan ortiq, 043 dan 0,056 gacha (1,1 dan 1,4 gacha) | 0.005 (0.13) | 0.006 (0.15) | 0.004 (0.10) | 0.005 (0.13) |
| {0}} dan ortiq, 056 dan 0,070 gacha (1,4 dan 1,8 gacha) | 0.006 (0.15) | 0.007 (0.18) | 0.005 (0.13) | 0.006 (0.15) |
| {0}} dan ortiq, 070 dan 0,078 gacha (1,8 dan 1,9 gacha) | 0.007 (0.18) | 0.008 (0.20) | 0.006 (0.15) | 0.007 (0.18) |
| {0}},078 dan 0,093 gacha (1,9 dan 2,4 gacha) | 0.008 (0.20) | 0.009 (0.23) | 0.007 (0.18) | 0.008 (0.20) |
| {0}},093 dan 0,109 gacha (2,4 dan 2,8 gacha) | 0.009 (0.23) | 0.010 (0.25) | 0.007 (0.18) | 0.009 (0.23) |
| {0}} dan ortiq, 109 dan 0,125 gacha (2,8 dan 3,2 gacha) | 0.010 (0.25) | 0.012 (0.31) | 0.008 (0.20) | 0.010 (0.25) |
| {0}} dan ortiq, 125 dan 0,140 gacha (3,2 dan 3,6 gacha) | 0.012 (0.31) | 0.014 (0.36) | 0.008 (0.20) | 0.010 (0.25) |
| {0}} dan ortiq, 140 dan 0,171 gacha (3,6 dan 4,3 gacha) | 0.014 (0.36) | 0.016 (0.41) | 0.009 (0.23) | 0.012 (0.31) |
| {0}} dan ortiq, 171 dan 0,187 gacha (4,3 dan 4,8 gacha) | 0.015 (0.38) | 0.017 (0.43) | 0.010 (0.25) | 0.013 (0.33) |
| {0}} dan ortiq, 187 dan 0,218 gacha (4,8 dan 5,5 gacha) | 0.017 (0.43) | 0.019 (0.48) | 0.011 (0.28) | 0.015 (0.38) |
| {0}} dan ortiq, 218 dan 0,234 gacha (5,5 dan 5,9 gacha) | 0.018 (0.46) | 0.020 (0.51) | 0.012 (0.31) | 0.016 (0.41) |
| {0}} dan ortiq, 234 dan 0,250 gacha (5,9 dan 6,4 gacha) | 0.020 (0.51) | 0.022 (0.56) | 0.013 (0.33) | 0.018 (0.46) |
| Har ikki chetidan 3/8 dyuym (9,5 mm) yoki undan ko'proq o'lchanadi, har qanday joyda o'lchanadigan kengligi 1 dyuym (25,4 mm) dan past bo'lgan chiziqdan tashqari. Standart varaq toleranslari qalinligi 0,125 dyuym (3,2 mm) dan ortiq va kengligi 12 dyuym (305 mm) dan ortiq bo‘lgan barcha qalinligi uchun amal qiladi. |
||||
| Sovuq haddelenmiş | ||||
| 0.050 (1.27) gacha, shu jumladan | 0.0015 (0.038) | |||
| {0}}.050 dan 0,093 gacha (1,27 dan 2,39 gacha) | 0.0025 (0.063) | |||
| {0}},093 dan 0,125 gacha (2,39 dan 3,18 gacha) | 0.004 (0.11) | |||
| Tashqi diametri, dyuym (mm) | Kesish uzunligi, dyuym (mm) | |
|---|---|---|
| Ustida | ostida | |
| 2 yoshgacha (50,8) | 1/8 (3.2) | 0 |
| 2 (50,8) va undan yuqori | 3/16 (4.8) | 0 |
| Belgilangan qalinligi, dyuym (mm) | Belgilangan kenglik, dyuym (mm) | Belgilangan kenglikdagi ruxsat etilgan o'zgarishlar, dyuym (m) | |
|---|---|---|---|
| Bundan tashqari | Minus | ||
| Varaq | |||
| 0.250 (6,35) gacha | Hammasi | 0.125 (3.18) | 0 |
| Ip | |||
| 0 ostida.075 (1,9) | 12 tagacha (305), shu jumladan | 0.007 (0.18) | 0.007 (0.18) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0 | |
| {0}},075 dan 0,100 gacha (1,9 dan 2,5 gacha), shu jumladan | 12 tagacha (305), shu jumladan | 0.009 (0.23) | 0.009 (0.23) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0 | |
| {0}}, 100 dan 0,125 gacha (2,5 dan 3,2 gacha), shu jumladan | 12 tagacha (305), shu jumladan | 0.012 (0.30) | 0.012 (0.30) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0 | |
| {0}}, 125 dan 0,160 gacha (3,2 dan 4,1 gacha), shu jumladan | 12 tagacha (305), shu jumladan | 0.016 (0.41) | 0.016 (0.41) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0 | |
| {0}}, 160 dan 0,187 gacha (4,1 dan 4,7 gacha), shu jumladan | 12 tagacha (305), shu jumladan | 0.020 (0.51) | 0.020 (0.51) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0 | |
| {0}}, 187 dan 0,250 gacha (4,7 dan 6,4 gacha), shu jumladan | 12 tagacha (305), shu jumladan | 0.062 (1.6) | 0.062 (1.6) |
| 12 dan 48 gacha (305 dan 1219 gacha), shu jumladan | 0.062 (1.6) | 0.062 (1.6) | |
Ishlab chiqarish jarayonlari issiqlik bilan ishlov berish:
ASME SB 670 UNS N07718qarish bilan davolash orqali kuchini sezilarli darajada oshirish mumkin. Yetkazib beruvchi qarish jarayonidan so'ng material yuqoridagi jadvalda ko'rsatilgan mexanik xususiyatlarga ega bo'lishini ta'minlashi kerak. UchunInconel Alloy 718 plitasi, yog'ingarchilikni issiqlik bilan ishlov berish (qari ishlov berish) 1325 ± 25 daraja F (718 ± 14 daraja) ga qadar qizdirishdan iborat bo'lishi kerak, haroratda 8 soat ushlab turish, pechni 1150 ± 25 daraja F (621 ± 14 daraja) ga qadar sovutish, jami bo'lguncha ushlab turish kerak. qarishni davolash vaqti 18 soatga yetdi, keyin esa havo sovutiladi.
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ASTM B670 UNS N07718 plitalari ilovalari:
- Elektronika: elektr kontaktlarini, ulagichlarni va bosilgan elektron platalarni qoplash uchun.
- Kimyoviy ishlov berish: korroziy muhitga ta'sir qiladigan tanklar, idishlar va quvurlarni qoplash uchun.
- Aerokosmik: yuqori quvvat, korroziyaga chidamlilik va o'tkazuvchanlikni talab qiluvchi komponentlar uchun.
- Avtomobil: dekorativ bezak, yonilg'i xujayrasi komponentlari va egzoz tizimlari uchun.
