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32-Station (20g) Automatic Arc Melting System for High Throughput Alloy Research- SP-MSM360
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Item Number: SP-MSM360
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EQ-SP-MSM360 is a customized 32-station automatic Arc Melting System for high throughput MGI research such as alloy formation and phase diagram developments. Such an arc melting system consists of a gas-controlled/Vacuum glove box with CNC three-axis (X, Y, Z) of movement for precise "arc stinger" to "hearth cavity" positioning and stirring operations. Up to 32 alloy specimens (two 16-cavity copper crucibles) can be produced in a single batch in an ultra-clean environment (<1 ppm H2O and O2 level). Manual arc melting operation with a handheld arc melting stinger is also available. It is an efficient and economical system for high throughput MGI research of new-generation High-Entropy Alloys.
Reference literature: Design of refractory multi-principal-element alloys for high-temperature applications
SPECIFICATIONS:
Features
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- Designed for high throughput, automatic arc melting of 32 samples (each sample weight <10g iron-based alloy) up to 3000 ℃ in a single batch (Various crucible design is available upon request)
- Glove-box ensures arc melting in an ultra-clean gas environment with <1ppm H2O and O2 level
- Water-cooled copper crucible, crucible grid cover, and vacuum dust removal (optional) allow arc melting of multiple samples without cross-contamination.
- 4 mm diameter tungsten electrode is mounted on a CNC three-axis (X, Y, Z) stage inside the glove box.
- The tungsten electrode can be programmed with stirring motion for uniform arc melting of large samples.
- A powerful arc melting power supply enables reliable, stable arc ignition.
- Manual arc melting with a handheld stinger is available.
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| Structure |
- The high throughput, automatic arc melting system consists of
- Standard glove-box with <1ppm H2O and O2 purification system
- Two 16-cavity copper crucibles (32 cavities total) with water cooling
- Water-cooled tungsten electrode integrated with CNC three-axis (X, Y, Z) stage
- Handheld arc melting stinger with KF40 feedthrough.
- 16 L/min recirculating water chiller for cooling the copper crucibles and arc melting stinger.
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Arc Melting & Copper Hearth
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- Metals are melted with an electric arc in a water-cooled copper crucible which has 32 cavities (25mm Dia x 8mm depth each). This allows the melting (up to 3000°C) of 32 specimens in a single batch without cross-contamination (see pic.1 and pic.2 below)
- The Stainless steel crucible grid cover is included to protect the samples from cross-contamination ( pic.2)
- The vacuum vapor removal fixture is installed on the CNC stage to minimize cross-contamination during arc melting of low melting point materials. (see pic.3 below)
- 4 mm diameter tungsten electrode /arc stinger is installed inside the glovebox with CNC X, Y, Z positioning (see pic.4 below).
- The water-cooled rectangular copper hearth is installed on the X (or Y) axes motion table.
 pic.1  Pic. 2  Pic. 3  Pic. 4
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CNC Positioning
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- Touch screen CNC three linear axes (X-Y-Z) of motion enables precise "arc stinger" to "hearth cavity" positioning as programmed to achieve automatic melting by touching one button.
- Arc stinger motion is driven by several step motors to achieve X, Y, Z or circle moment for the best melting result
- The arc stinger travels in the pattern shown in the picture on the left.
- The stirring motion of the arc melting stinger can be programmed for the uniform melting of large samples.
- For each sample, the arc melting operation consists of two steps: stationary arcing step and stirring step (1 - 10mm diameter adjustable stirring motion)
- X, Y, Z motion speed: ≤ 800mm/min
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Gas-Controlled Glove Box
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- Glove Box: EQ-VGB-6OP-LD (see pic.1 below)
- Operation Environment: dry environment with good ventilation, 15-25 ℃. Air conditioner (not included) is required if out of this range.
- Glove-box chamber dimension: 1200mm x 740mm x 900mm (LxWxH)
- Two airlock chambers:
- Large antechamber dimension: 360mm ID x 600mm L
- Small antechamber dimension: 150mm ID x 220mm L
- Two 175mm diameter glove ports with a pair of 8" Butadyl gloves.
- Filter system: gas outlet filters can eliminate particle size > 0.3μm
- Openable front window panel for easy equipment loading
- Arc melting stinger/gun with KF40 feedthrough to connect into the glovebox (see pic.2 and pic.3 below)
- Glove Box with H2O & O2 Purification System and Openable Front Window is included with all necessary feedthrough, which includes CNC stage control cable, cooling water inlet & outlet, arc melting power +/-, handheld arc melting stinger, and vacuum dust removal. (see pic.4 below)
 pic.1  pic.2  pic.3  pic.4
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Arc Melting Power Supply
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- Input Voltage: 110 or 220 VAC selectable, single phase
- Current: 34 A max (40A circuit breaker integrated). Recommend power source breaker ≥ 40A
- Rated DC output:
- 15V/ 125A at 35% duty cycle - 110V input
- 18V/ 185A at 35% duty cycle - 220V input
- Minimum DC current output: 5A
- Pulse DC and AC output modes are available.
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Gas Purification System
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- Automatic moisture and oxygen removal to <1 ppm (20℃, 1 atm)
- Pressure Range: ± 12m-bar
- 240 L/m Heavy-duty mechanical vacuum pump with exhaust filter is included.
- Precision Humidity Analyzer with KF25 Flange (0-999 ppm) and the oxygen sensor is installed on the Purification System with an accuracy of +/- 0.1 ppm
- Large capacity moisture filter built in the bottom of the mobile cart, which can absorb moisture up to 1.5 kg
- The regeneration Temperature Controller is built-in for filter regeneration
- An automatic pressure control system can keep the pressure at a constant level. Manual pressure control is allowed via a foot pedal.
- The touch screen panel enables easy setting, humidity, oxygen concentration, and pressure level display
- The removable control panel can be placed on the side for easy operation
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Water Chiller & Gas
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- MTI's KJ-5000 recirculating water chiller (16 L/min) is included for the water cooling of copper crucibles and arc melting stinger.
- High-purity Argon gas is with at least 5N purity (>99.999%) required (not included) for the arc melting process.
- 5% Hydrogen + 95% Argon gas is needed for regenerating the purification station (not included)
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| Dimensions |
System dimension: 2300mm x 1230mm x 1880mm (LxWxH) |
Shipping Weight & Dimensions
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- Two Pallets
- #1: 1455 lbs, 80"x41"x87"
- #2: 460 lbs, 48"x40"x30"
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| Warranty |
- One-year limited warranty with lifetime support
- Rusting and damage due to improper storage conditions or maintenance are not covered by a warranty
- Gloves and oxygen sensors are consumable parts that are NOT covered by warranty.
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| Compliance |
- CE certified
- NRTL or CSA (UL 6101 ) Certification is available upon request at additional charges
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| Application Notes & Warnings |
- Regularly perform regeneration to maintain optimum purification efficiency.
- The O2 sensor is consumable and its expected lifespan is around one year. Please order an O2 sensor replacement at MTI at extra cost.
- During the arc melting operation, never allow the tungsten tip to touch the material or the copper crucible! M
 ove the glove Use tweezers to manipulate the sample only after the sample has been cooled down.
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| Operation Demo Video |
Reference article: High-throughput experiment-assisted study of alloying effects on oxidation of Nb-based alloys
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Optional equipment
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- The automated arc melting system may connect to a tube furnace to do annealing and quenching ( Pic 1 & 2)
- EQ-XRF-32 is a high throughput, automatic 32-sample X-ray fluorescence (XRF) / energy dispersive spectrometer (EDS) system for non-destructive composition analysis (Pic. 3)
- EQ-XRF-32-LD is a high throughput hardness testing system ( Pic. 4)
 Pic.1 Pic. 2 Pic. 3 Pic. 4
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