API 5CT yog 'qobig'i uchun qattiqlik juda muhim ko'rsatkichdir. Faqat malakali qattiqlikka ega bo'lgan yog 'qoplamalari foydalanish paytida ta'sirni ta'minlashi mumkin. Aksincha, agar qattiqlik sifatsiz bo'lsa, foydalanish paytida muammolar paydo bo'lishi mumkin. Baxtsiz hodisalar xavf tug'dirishi mumkin. Agar siz API 5CT yog 'qobig'ining qattiqligini bilmoqchi bo'lsangiz, yog 'qobig'ini tajribalar orqali sinab ko'rishingiz mumkin.
1. Tortishish sinovi
Kesish sinovi API 5CT neft qobig'ining namunasini tayyorlash, namunani valentlik sinov mashinasida sindirish uchun tortib olish va keyin bir yoki bir nechta mexanik xususiyatlarni o'lchashdir. Odatda faqat yorilish va maydonning qisqarishidan keyin kuchlanish, oqish kuchi va cho'zilish o'lchanadi. Kesish sinovi API 5CT neft qobig'ining asosiy mexanik xususiyatlarini sinash usuli hisoblanadi.
2. Qattiqlik sinovi
Qattiqlik sinovi qattiq indenterni belgilangan sharoitlarda API 5CT yog 'qobig'i namunasi yuzasiga sekin bosish uchun qattiqlik tekshirgichdan foydalanish va keyin materialni aniqlash uchun chuqurlik chuqurligini yoki o'lchamini sinab ko'rishdir.
Qopqoq quvurlarining kimyoviy tarkibi
| Standart | Baho | Kimyoviy tarkibi (％) | |||||||||
| API SPEC 5CT | J55 | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V |
| K55 | 0.34-0.39 | 0.20-0.35 | 1.25-1.50 | 0.020 dan kichik yoki unga teng | 0 dan kichik yoki unga teng.015 | 0 dan kichik yoki unga teng.15 | 0 dan kichik yoki unga teng.20 | 0 dan kichik yoki unga teng.20 | / | / | |
| N80 | 0.34-0.38 | 0.20-0.35 | 1.45-1.70 | 0.020 dan kichik yoki unga teng | 0 dan kichik yoki unga teng.015 | 0 dan kichik yoki unga teng.15 | / | / | / | 0.11-0.16 | |
| L80 | 0.15-0.22 | 1 dan kichik yoki unga teng.00 | 0.25-1.00 | 0.020 dan kichik yoki unga teng | 0.010 dan kichik yoki unga teng | 12.0-14.0 | 0 dan kichik yoki unga teng.20 | 0 dan kichik yoki unga teng.20 | / | / | |
| P110 | 0.26-0.395 | 0.17-0.37 | 0.40-0.70 | 0.020 dan kichik yoki unga teng | 0.010 dan kichik yoki unga teng | 0.80-1.10 | 0 dan kichik yoki unga teng.20 | 0 dan kichik yoki unga teng.20 | 0.15-0.25 | 0 dan kichik yoki unga teng.08 | |
Qopqoq quvurining mexanik xususiyatlari
| Baho | Turi |
To'liq cho'zilish yuk ostida (%) |
Hosildorlik kuchi (min)Mpa |
Hosildorlik kuchi (maksimal)Mpa |
Mustahkamlik chegarasi min Mpa |
Qattiqlik Maks (HRC) |
Qattiqlik Maks (HBW) |
| J55 | - | 0.5 | 379 | 552 | 517 | - | - |
| K55 | - | 0.5 | 379 | 552 | 655 | - | - |
| N80 | 1 | 0.5 | 552 | 758 | 689 | - | - |
| N80 | Q | 0.5 | 552 | 758 | 689 | - | - |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 |
| C90 | - | 0.5 | 621 | 724 | 689 | 25.4 | 255 |
| C95 | - | 0.5 | 655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | Hammasi | 0.65 | 862 | 1034 | 931 | - | - |
