The evaluation of different environments in ultra-high frequency induction sintered powder metal compacts

Çavdar, Pınar Sari; Çavdar, Uğur

doi:10.3989/revmetalm.036

Cited by 12 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…After the literature review was examined, it was found that iron based compacts could be sintered with induction in 5 minutes [2 and 8] successfully. When the hardness values obtained in the previous studies are compared, it is seen that the hardness value for the iron-based TM samples is about 50 HRB [3 and 14] under an open atmosphere and 55 HRB [5] in an argon atmosphere. It has been determined by this study that the vacuum environment increases the hardness value.…”

Section: Findings and Discussionmentioning

confidence: 99%

Determination of the Sintering Dwell Time of Gearing Iron Based Composition by Using 900 KHZ Induction System

Çavdar¹

2018

NWSA

View full text Add to dashboard Cite

In this study, iron based powder metal (PM) compacts are sintered by two different sintering methods. One of the sintering methods is conventional sintering, 2kW atmosphere controlled oven is used in the sintering application. TM compacts are sintered at 1120°C for 30 minutes. In the study other used sintering method is induction which is a novel and fast. PM compacts are sintered at a temperature of 1120°C for 1 to 10 minutes using a 900 kHz ultra-high frequency induction system (UHFIS) with a power of 2.8kW. Hardness, density and microstructure images of PM compacts are examined and compared each other.When the obtained results are evaluated, 30 minutes conventional sintered PM compacts test results' are reached in 5 minutes using by UHFIS. Thus, iron-based PM compacts are sintered in 6 times less dwell time while using the induction system. Keywords: Iron, PM, Induction, UHFIS, Sintering INTRODUCTIONProduction of the materials by the powder metallurgy (PM) method consists of homogenous mixing of various metallic or ceramic powders at micro-scale, shaping by pressing and lastly sintering by heating. PM Production is known as a fast and practical method. Although powder metallurgy method is generally used in the production of metallic materials, it is possible to produce many non-metal parts by using PM method nowadays. It is a very useful and less problematic method because the PM parts are in desired sizes after sintering process. The iron PM parts takes the first place, within the metallic PM parts. They can be produce fast and inexpensive. Iron-based PM parts are mostly produced in industrial applications by using conventional sintering methods. In the conventional sintering process very long batch type furnaces are used. For the sintering of these furnaces, heating to the needed temperatures and fixing them at the sintering temperatures provides significant energy consumption and energy cost. Different sintering processes are being used in order to provide the same sintering process. Among these are SPS (Spark Plasma Sintering), microwave sintering, hot pressing and induction sintering. Induction sintering has a very different place among other comparative sintering processes. During induction sintering process, induction current is passed through to the magnetic materials. At this point, PM compacts temperature is reaches to sintering temperature in 10-15 seconds. Iron and iron-based PM compacts can be successfully sintered with medium [1, 2 and 3] or ultra-high frequency induction systems [4 and 5]. Induction system is generally using in forging [6], heat treatment [7], welding [8, 9, 10 and 11] and casting [12 and 13] operations.

show abstract

Section: Findings and Discussionmentioning

confidence: 99%

Determination of the Sintering Dwell Time of Gearing Iron Based Composition by Using 900 KHZ Induction System

Çavdar¹

2018

NWSA

View full text Add to dashboard Cite

show abstract

“…Literatür taraması incelendiğinde indüksiyon ile sinterleme [2,8] uygulanmış demir esaslı TM numunelerinde 1120 ° C sıcaklıkta indüksiyon ile başarı ile sinterlendiği görülmüştür. Önceki çalışmalarda elde edilmiş sertlik değerleri karşılaştırıldığında demir esaslı TM numuneler için sertlik değerinin açık atmosfer altında yaklaşık 50 HRB [3,14] ve argon ortamında 55 HRB [5] olduğu görülmektedir. Vakum ortamının sertlik değerini arttırdığı yapılan çalışma ile tespit edilmiştir.…”

Section: Bulgular Ve Tartişmaunclassified

“…Demir ve demir esaslı TM Numuneler orta [1][2][3] veya ultra-yüksek frekanslı indüksiyon sistemleri [4][5] ile başarı ile sinterlenebilmektedir. İndüksiyon sistemi sinterleme haricinde kullanım alanları incelendiğinde dövme [6], ısıl işlem [7], kaynak [8][9][10][11] ve döküm [12][13] alanlarında kullanılmaktadır.…”

Section: Introductionunclassified

Demi̇r Esasli Toz Metal Malzemeleri̇n Ultra-Yüksek Frekansli İndüksi̇yon Si̇stemi̇ İle Si̇nterleme Sicakliği Opti̇mi̇zasyonu

Çavdar¹,

Çavdar²

2019

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Self Cite

View full text Add to dashboard Cite

Yapılan çalışmada, demir esaslı toz metal (TM) malzemeler iki farklı metot kullanılarak sinterlenmiştir. TM numunelerin bir kısmı 2kW güce sahip atmosfer kontrollü fırında, 1120 °C sıcaklıkta ve 30 dakika sürede geleneksel yöntemle sinterlenmiştir. Çalışmada kullanılan diğer TM numunelerde 2.8kW güce sahip 900kHz'lik ultra yüksek frekanslı indüksiyon sistemi (UYFİS) kullanılarak, 1000 °C-1200 °C sıcaklıkları arasında 6 farklı sıcaklıkta 5 dakika sürelerde sinterlenmiştir. TM numunelerin sertlik, yoğunluk ve mikro yapı görüntüleri incelenmiş ve kendi aralarında karşılaştırılmıştır. Elde edilen sonuçlar değerlendirildiğinde konvansiyonel sinterleme metot ile 30 dakikada elde edilen değerlere UYFIS kullanılarak 1120 °C sıcaklıkta ulaşılmıştır. Böylece demir esaslı TM numuneler indüksiyon sistemi kullanılarak sinterlendiğinde 6 kat daha kısa sürede elde edildiği görülmüştür.

show abstract

“…PM based compacts are sintered by medium frequency induction system [7][8][9] or ultra high frequency induction system [10,11]. Induction system could be using different processes like; forging [12], heat treatment [13], welding [14][15][16] or casting.…”

Section: Introductionmentioning

confidence: 99%

Cost analysis of T6 induction heat treatment for the aluminum-copper powder metal compacts

Taştan

Gökozan

Çavdar³

et al. 2020

SCI SINTER

View full text Add to dashboard Cite

This work compares an energy cost and an energy consumption results of the 4 wt.% cupper mixed aluminum based powder metal (PM) compacts processing under induction or furnace heating. Total power and energy consumptions and total energy costs per kilogram and compact have been analyzed. T6 precipitation heat treatment applications have been applied with two different methods, one with 2.8 kW, 900 kHz ultra-high frequency induction heating system (UHFIHS), other with 2 kW chamber furnace. In the first method, Al-Cu PM compacts have been heated by induction at 580 °C in one minute and then cooled down by water. Afterwards, the samples have been heated 170, 180, 190 and 200 °C respectively for artificial ageing and cooled naturally. In the second treatment, unlike the first study, Al-Cu PM compacts are heated by chamber furnace at 540 °C in 5 hours and cooled by water. Then PM compacts are artificially aged at 190 °C in 10 hours with same furnace. During both processes, energy and power consumptions for each defined process have been measured. Optimum heat treatment of the induction is determined. The cheaper energy cost is obtained by the induction heat treatment.

show abstract

The evaluation of different environments in ultra-high frequency induction sintered powder metal compacts

Cited by 12 publications

References 17 publications

Determination of the Sintering Dwell Time of Gearing Iron Based Composition by Using 900 KHZ Induction System

Determination of the Sintering Dwell Time of Gearing Iron Based Composition by Using 900 KHZ Induction System

Demi̇r Esasli Toz Metal Malzemeleri̇n Ultra-Yüksek Frekansli İndüksi̇yon Si̇stemi̇ İle Si̇nterleme Sicakliği Opti̇mi̇zasyonu

Cost analysis of T6 induction heat treatment for the aluminum-copper powder metal compacts

Contact Info

Product

Resources

About