VAR(Vacuum Arc Remelting)

Dong-A Special Metals' role in advanced titanium recycling technology

Hello, this is Dong-A Special Metals.

Today, we introduce Vacuum Arc Remelting (VAR)—one of the most efficient and widely used melting methods for processing titanium sponge and cobble. This technique is ideal for producing high-purity titanium ingots used in aerospace, medical, and energy applications.


What is Vacuum Arc Remelting (VAR)?

Vacuum Arc Remelting (VAR) is a secondary melting process that refines metals by melting a consumable electrode under a vacuum using an electric arc. The process eliminates impurities and improves the metal’s microstructure, producing premium-grade titanium ingots with consistent quality.


Comparison: VAR vs. Other Titanium Melting Methods

Common melting methods for titanium ingots include:

  • VAR (Vacuum Arc Remelting)

  • ISM (Induction Skull Melting)

  • EBM (Electron Beam Melting)

  • PAM (Plasma Arc Melting)

Among these, VAR stands out as the most accessible and suitable method for using titanium sponge and cobble.


How VAR Works with Titanium Sponge and Cobbles

  • Raw Material Preparation

Titanium sponge and cobbles are mixed and compressed into electrode shapes using high-pressure compressors. The raw materials are chosen for their purity, often sourced from recycled industrial scrap.

  • Melting in a Vacuum Furnace

The titanium electrodes are placed in a vacuum chamber where they are melted using an electric arc. This vacuum condition prevents contamination from oxygen and nitrogen.

  • Ingot Formation and Re-Melting

The VAR process may be repeated 2–3 times to refine the material further and produce high-purity titanium ingots with superior mechanical properties.


Key Advantages of the VAR Process

  • High Purity: Melting under vacuum eliminates gas contamination, reducing impurities and inclusions.

  • Enhanced Mechanical Properties: The uniform microstructure improves strength and reliability.

  • Wide Versatility: Suitable for titanium, nickel-based superalloys, and specialty steels.


Boosting Scrap Value Through VAR

Titanium scrap often contains impurities such as oils from machining. Traditionally, this scrap was exported at low prices. However, with Dong-A Special Metals’ advanced VAR technology, we now upgrade this scrap into valuable titanium ingots—enhancing Korea’s reputation as a leader in titanium recycling.

We specialize in purchasing titanium scrap, processing it through VAR and other proprietary methods, and returning high-quality recycled material to the domestic and global markets.


Contact Us

If your company produces titanium scrap or is seeking a reliable partner for high-quality recycled titanium materials, Dong-A Special Metals is here to help. Our mission is to create a circular economy through advanced metal recycling. Contact us anytime for consultation.


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Contact Us

Homepage : http://www.dongaspecial.co.kr/

Mobile : +82-10-6367-7392

Company Catalog Download :

1) Eng : https://blog.naver.com/dongaspecial/223683563148

2) Kor : https://blog.naver.com/dongaspecial/223683558947

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Product Brochure Download :

1) Eng : https://blog.naver.com/dongaspecial/223683548933

2) Kor : https://blog.naver.com/dongaspecial/223683546036

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"E-mail"

1) sales@dongasepcial.co.kr

2) adenjang@dongasepcial.co.kr

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"Messenger"

1) Whatsapp : +82-10-6367-7392, +82-10-9414-2752

2) Wechat ID : dongaspecial, adenjang

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4) Kakao ID : dongaspecial, bluemanner

5) OpenKakao : https://open.kakao.com/o/ghgyxcYe

6) Zalo : +821094142752

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Ltd. is selling titanium (titanium) sponge substitutes for research and alloying on its smart store in order to localize the material in Korea. We look forward to your interest and support. Thank you.


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