ning quyma tuzilishiostenitik zanglamaydigan po'latquyma - ostenit + karbid yoki ostenit + ferrit. Issiqlik bilan ishlov berish ostenitik zanglamaydigan po'latdan yasalgan quymalarning korroziyaga chidamliligini oshirishi mumkin.
Ostenitik zanglamaydigan po'latning ekvivalent darajasi | ||||||||
| AISI | W-stoff | DIN | BS | SS | AFNOR | UNE / IHA | JIS | UNI |
| 304 | 1.4301 | X5 CrNi 18 9 | 304 S 15 | 2332 | Z 6 CN 18.09 | F.3551 | SUS 304 | X5CrNi18 10 |
| 305 | 1.4303 | X5 CrNi 18 12 | 305 S 19 | - | Z 8 CN 18.12 | - | SUS 305 | X8CrNi19 10 |
| 303 | 1.4305 | X12 CrNiS 18 8 | 303 S 21 | 2346 | Z 10 CNF 18.09 | F.3508 | SUS 303 | X10CrNiS 18 09 |
| 304 l | 1.4306 | X2 CrNiS 18 9 | 304 S 12 | 2352 | Z 2 CN 18.10 | F.3503 | SUS 304L | X2CrNi18 11 |
| 301 | 1.4310 | X12 CrNi 17 7 | - | 2331 | Z 12 CN 17.07 | F.3517 | SUS 301 | X12CrNi17 07 |
| 304 | 1.4350 | X5 CrNi 18 9 | 304 S 31 | 2332 | Z 6 CN 18.09 | F.3551 | SUS 304 | X5CrNi18 10 |
| 304 | 1.4350 | X5 CrNi 18 9 | 304 S 31 | 2333 | Z 6 CN 18.09 | F.3551 | SUS 304 | X5CrNi18 10 |
| 304LN | 1.4311 | X2 CrNiN 18 10 | 304 S 62 | 2371 | Z 2 CN 18.10 | - | SUS 304 LN | - |
| 316 | 1.4401 | X5 CrNiMo 18 10 | 316 S 16 | 2347 | Z 6 CND 17.11 | F.3543 | SUS 316 | X5CrNiMo17 12 |
| 316 l | 1.4404 | - | 316 S 12/13/14/22/24 | 2348 | Z 2 CND 17.13 | SUS316L | X2CrNiMo17 12 | |
| 316 LN | 1.4429 | X2 CrNiMoN 18 13 | - | 2375 | Z 2 CND 17.13 | - | SUS 316 LN | - |
| 316 l | 1.4435 | X2 CrNiMo 18 12 | 316 S 12/13/14/22/24 | 2353 | Z 2 CND 17.13 | - | SUS316L | X2CrNiMo17 12 |
| 316 | 1.4436 | - | 316 S 33 | 2343 | Z 6 CND18-12-03 | - | - | X8CrNiMo 17 13 |
| 317 l | 1.4438 | X2 CrNiMo 18 16 | 317 S 12 | 2367 | Z 2 CND 19.15 | - | SUS 317 L | X2CrNiMo18 16 |
| 329 | 1.4460 | X3 CrNiMoN 27 5 2 | - | 2324 | Z5 CND 27.05.Az | F.3309 | SUS 329 J1 | - |
| 321 | 1.4541 | X10 CrNiTi 18 9 | 321 S 12 | 2337 | Z 6 CND 18.10 | F.3553 | SUS 321 | X6CrNiTi18 11 |
| 347 | 1.4550 | X10 CrNiNb 18 9 | 347 S 17 | 2338 | Z 6 CNNb 18.10 | F.3552 | SUS 347 | X6CrNiNb18 11 |
| 316Ti | 1.4571 | X10 CrNiMoTi 18 10 | 320 S 17 | 2350 | Z 6 CNDT 17.12 | F.3535 | - | X6CrNiMoTi 17 12 |
| 309 | 1.4828 | X15 CrNiSi 20 12 | 309 S 24 | - | Z 15 CNS 20.12 | - | SUH 309 | X16 CrNi 24 14 |
| 330 | 1.4864 | X12 NiCrSi 36 16 | - | - | Z 12 NCS 35.16 | - | SUH 330 | - |
1. Eritmani issiqlik bilan ishlov berish
Eritmani issiqlik bilan ishlov berishning umumiy tavsifi: quymani 950 ° C - 1175 ° S gacha qizdirish va bir fazali strukturani olish uchun zanglamaydigan po'latdan karbidlarni to'liq eritish uchun issiqlik saqlanishidan keyin uni suvga, yog'ga yoki havoga joylashtirish. Eritma haroratini tanlash quyma po'latdagi uglerod tarkibiga bog'liq. Uglerod miqdori qanchalik yuqori bo'lsa, qattiq eritma harorati shunchalik yuqori bo'ladi.
Isitish jarayonida po'lat quyma yuzasi va yadro o'rtasidagi harorat farqini kamaytirish uchun ostenitik zanglamaydigan po'latdan eritma bilan ishlov berishning isitish usuli past haroratda oldindan qizdirilishi va keyin tezda eritma haroratiga qizdirilishi kerak. To'qimalarining devor qalinligi oshishi bilan ushlab turish vaqti mos ravishda ortishi kerak.
Eritma bilan ishlov berish uchun sovutish muhiti suv, moy yoki havo bo'lishi mumkin, ulardan suv eng ko'p ishlatiladi. Havo sovutish faqat yupqa devorli po'lat quyish uchun javob beradi.
Quyma ostenitik zanglamaydigan po'latdan qattiq eritma bilan ishlov berishning texnik xususiyatlari | |||
| Xitoyda daraja | Chet elda ekvivalent baho | Eritma harorati / ℃ | Qattiqlik / HBW |
| ZG03Cr18Ni10 | / | 1050 - 1100 | / |
| ZG0Cr18Ni9 | / | 1080 - 1130 | / |
| ZG1Cr18Ni9 | G-X15CrNi18 8 (Nemis darajasi) | 1050 - 1100 | 140 - 190 |
| ZGCr18Ni9Ti | 950 - 1050 | 125 - 180 | |
| ZGCr18Ni9Mo2Ti | X18H9M2 (ruscha darajasi) | 1000 - 1050 | 140 - 190 |
| ZG1Cr18Ni12Mo2Ti | X18H12M2 (ruscha darajasi) | 1100 - 1150 | / |
| ZGCr18Ni11B | X18H11B (ruscha darajasi) | 1100 - 1150 | / |
| ZG03Cr18Ni10 | CF-3 (AQSh darajasi) | 1040 - 1120 | / |
| ZG08Cr19Ni11Mo3 | CF-3M (AQSh darajasi) | 1040 - 1120 | 150 - 170 |
| ZG08Cr19Ni9 | CF-8 (AQSh darajasi) | 1040 - 1120 | 140 - 156 |
| ZG08Cr19Ni10Nb | CF-8C (AQSh darajasi) | 1065 - 1120 (870 - 900 da barqarorlashtirish) | 149 |
| ZG07Cr19Ni10Mo3 | CF-8M (AQSh darajasi) | 1065 - 1120 | 156 - 210 |
| ZG16Cr19Ni10 | CF-16F (AQSh darajasi) | 1095 - 1150 | 150 |
| ZG2Cr19Ni9 | CF-20 (AQSh darajasi) | 1095 - 1150 | 163 |
| ZGCr19Ni11Mo4 | CG-8M (AQSh darajasi) | 1040 - 1120 | 176 |
| ZGCr24Ni13 | 1095 - 1150 | 190 | |
| ZG1Cr24Ni20Mo2Cu3 | 1100 - 1150 | / | |
| ZG2Cr15Ni20 | CK-20 (AQSh darajasi) | 1095 - 1175 | 144 |
| ZGCr20Ni29Mo3Cu3 | CH-7M (AQSh darajasi) | 1120 | 130 |
| ZG1Cr17Mn13N | 1100 | 223 - 235 | |
| ZG1Cr17Mn13Mo2CuN | 1100 | / | |
| ZG0Cr17Mn13Mo2CuN | 1100 | 223 - 248 | |
2. Barqarorlashtirish
Ostenitik zanglamaydigan po'lat eritma bilan ishlov berishdan keyin mukammal korroziyaga chidamliligiga ega. Shu bilan birga, quyma 500 ° C-850 ° C gacha qizdirilganda yoki quyma bu harorat oralig'ida ishlaganda, xrom karbid ostenit donalari chegarasi bo'ylab qayta cho'kadi va don chegarasining korroziyasini yoki payvand chokining yorilishiga olib keladi. Bu hodisa sensibilizatsiya deb ataladi. Bunday ostenitik zanglamaydigan po'latdan yasalgan quymalarning intergranular korroziyaga chidamliligini yaxshilash uchun odatda titanium va niobiy kabi qotishma elementlarni qo'shish kerak. Eritma bilan ishlov berilgandan so'ng, 850 ° C - 930 ° C gacha qizdiring va keyin tez soviydi. Shu tarzda, titan va niobiy karbidlari birinchi navbatda ostenitdan cho'ktiriladi, shu bilan xrom karbidining cho'kishi oldini oladi va zanglamaydigan po'latdan korroziyaga chidamliligini yaxshilaydi.
Yuborilgan vaqt: 2021-yil 18-avgust