مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

بررسی تأثیر عملیات حرارتی آنیل بین پاسی و روانکار بر رفتار کشش سرد سوپر آلیاژ اینکونل X750 در فرایند مفتول‌کشی سرد

نوع مقاله : مقاله پژوهشی

نویسندگان
علیرضا میرک 1
امیرسالار دهقانی 2
1 مجتمع دانشگاهی مهندسی مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر، تهران، ایران
2 گروه مهندسی مواد، واحد علوم تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
10.22034/ijme.2025.509853.2058
چکیده
در تحقیق حاضر، تأثیر دما و زمان آنیل در محدوده‌ی دمایی 950 تا 1100 درجه سانتی‌گراد و مدت زمان‌های 1 تا 4 ساعت، بر ریزساختار و خواص مکانیکی مفتول تولید شده از جنس سوپر آلیاژ اینکونل X750 به روش کشش سرد توسط مطالعات ریزساختاری، بررسی های خواص مکانیکی و زبری سنجی بررسی ‌شده است. شمش اولیه توسط روش ذوب با قوس الکتریکی در خلأ ریخته‌گری شد، سپس قطر شمش از 25 میلی‌متر به 2 میلی‌متر توسط نورد شیاری داغ کاهش یافت. برای افزایش شکل پذیری، مفتول‌ها آنیل شدند. آنیل باعث کاهش استحکام کششی از 1600 به 800 مگاپاسکال و افزایش ازدیاد طول از 6 درصد به 70 درصد شد. با افزایش زمان آنیل اندازه دانه و ازدیاد طول افزایش و استحکام کاهش یافت. در فرایند مفتول کشی، مفتول اولیه در 6 مرحله آنیل و 11 پاس کشش سرد به قطر 1 میلی‌متر رسید. بهترین شرایط زمانی برای آنیل از بین زمان‌های 1 تا 4 ساعت، زمان 4 ساعت به دست آمد. بررسی‌های ریزساختاری، نشان داد که فرایند آنیل بین پاسی، باعث تبلور مجدد و بازیابی ساختار می‌شود و توان کار سختی افزایش‌یافته و پاس‌های بعدی مفتول‌کشی قابل انجام است. همچنین استفاده از روانکار حاوی MoS2، به علت کاهش اصطکاک باعث افزایش توانایی تغییر شکل سرد مفتول شد و تعداد مراحل آنیل را از 6 مرحله آنیل به 3 مرحله کاهش و استحکام کششی را از 900 به 1300 مگاپاسکال افزایش داد و زبری سطح از 3/8 به 6/2 میکرومتر کاهش یافت.
کلیدواژه‌ها
سوپر آلیاژ اینکونل X750؛ نورد شیاری داغ؛ مفتول‌کشی سرد؛ MoS2

عنوان مقاله English

Investigation of the effect of inter-pass annealing heat treatment and lubricant on the cold drawing behavior of Inconel X750 superalloy during cold wire drawing process

نویسندگان English

Alireza Mirak 1
Amirsalar Dehghani 2
1 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
2 Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده English

In the present study, the effects of annealing temperature and time—within the temperature range of 950 to 1100 °C and durations from 1 to 4 hours—on the microstructure and mechanical properties of wire made from Inconel X-750 superalloy, produced by cold drawing, were investigated through microstructural analysis, mechanical testing, and surface roughness measurements. The initial ingot was cast using vacuum arc remelting, and its diameter was reduced from 25 mm to 2 mm through hot groove rolling. To enhance ductility, the wires underwent annealing. Annealing reduced the tensile strength from 1600 to 800 MPa and increased elongation from 6% to 70%. As annealing time increased, grain size and elongation increased, while tensile strength decreased. During the wire drawing process, the initial wire underwent six stages of annealing and eleven passes of cold drawing to reach a final diameter of 1 mm. Among the tested durations, the optimal annealing time was 4 hours. Microstructural examinations revealed that interpass annealing led to recrystallization and structural recovery, enhancing workability and allowing further drawing passes. Additionally, the use of a lubricant containing molybdenum disulfide reduced friction, thereby improving the cold formability of the wire, reducing the number of required annealing steps from six to three, increasing tensile strength from 900 MPa to 1300 MPa, and decreasing surface roughness from 3.8 to 2.6 µm.

کلیدواژه‌ها English

Inconel X750 Superalloy
Hot Caliber Rolling
Cold Wire Drawing
MoS2
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