اثر فشار فشردن بر چگالش ذرات در تف‌جوشی فراجامد پودر پیش‌آلیاژی Cu-28Zn

نوع مقاله : یادداشت پژوهشی

نویسندگان

• سمیه قاسمی ¹
• مازیار آزادبه ²
• احد محمدزاده ²

¹ دانشگاه صنعتی سهند

² صنعتی سهند

10.22067/ma.v30i2.59477

چکیده

فشردن پودر برای حصول چگالی خام بیشینه از روش های افزایش چگالش و بهبود خواص در متالورژی پودر می باشد. اما در مواردی فشار فشردن تاثیر معکوسی بر چگالش می گذارد. هدف از این پژوهش بررسی تاثیر فشار فشردن بر چگالش و رفتار تف جوشی آلیاژ برنجی Cu-28Zn می باشد. بدین منظور نمونه هایی در فشار 100- 600 مگاپاسکال ساخته و در دمای 870 و 890 درجه سانتیگراد و زمان 30 دقیقه تف جوشی شدند. بررسی نتایج حاصل از چگالش در فشارهای مختلف در دمای 870 درجه سانتیگراد نشان دهنده ی چگالش بیشتر در نمونه هایی با فشار 300 مگاپاسکال می باشد که با افزایش دما به فشارهای پایین تر منتقل می شود.

کلیدواژه‌ها

• برنج تف جوشی شده
• فشار فشردن
• خردایش
• آرایش مجدد
• چگالش

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عنوان مقاله [English]

Compacting Pressure Effect on Densification in Supersolidus Liquid Phase Sintering of Prealloyed Brass Powder

نویسندگان [English]

• Somayeh Ghasemi ¹
• Maziyar Azadbeh ²
• Ahad Mohammadzadeh ²

¹ Sahand University of technology

² Sahand University of technology

چکیده [English]

Obtaining higher densities are a major target for getting maximum densification in powder metallurgy products. In some cases increasing of the compacting pressure has an inverse effect on the densification. The present study was aimed to evaluate the effect of compacting pressure on the densification and sintering behavior of Cu-28Zn prealloyed powder. For this purpose samples were compacted at pressures of 100, 200, 300, 400, 500 and 600 MPa and then were sintered at 870 and 890 °C for 30 minutes. The obtained results showed that the maximum densification occurred at 300 MPa and 870 °C.

کلیدواژه‌ها [English]

• Sintered brass
• compacting pressure
• Fragmentation
• rearrangement
• densification

مراجع

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