1、 Application of Vacuum melting furnace system:

model: GC-RZK-500

The vacuum hot melting furnace system adopts induction heating method and is mainly used for the melting of volatile alloys. It consists of High vacuum chamber, vacuum system, composite pressure measuring device, melting and casting system, water cooling system, exhaust system, electronic control system and test bench, etc. It has the function of operating in a real state and can achieve online continuous temperature measurement and vacuum casting. The equipment requires a reasonable internal design of the furnace body and strictly prohibits the occurrence of true discharge

The vacuum hot melting furnace system full fiber high-temperature box type resistance furnace is a national standard energy-saving periodic operation furnace, super energy-saving structure, adopting full fiber structure, saving 25% to 30% electricity. It uses heating element hangers, automatic sealing furnace doors, integrated rail connections, simple installation, and is suitable for heat treatment of various mechanical parts of metal materials such as mold steel, bearing steel, tool steel, stainless steel, pipe fittings, castings, high manganese steel liners, high chromium balls, and low chromium.

1.2. Composition of online box type drying furnace equipment:

The vacuum melting furnace system mainly consists of the vacuum furnace body (including furnace lining), electric heating device, furnace door, sealing device, hot air circulation system, power system, action control system, and recording system.

2、 Main technical parameters

Vacuum

1. System vacuum degree: Cold state limit true output ≤ 1.0 × 10-2Pa Under cold and no-load conditions, the system starts to extract air from the atmosphere and can reach 5.0 × 10-1Pa in 60 minutes, with a pressure rise rate not exceeding 1Pa/h

2. Maximum working temperature: 2200 ℃, with temperature fluctuations of less than ± 2 ℃ during the holding process.

3. Room temperature ultimate vacuum degree: 2.0 × 10-4Pa (room temperature)

4. Pumping speed: from 30 minutes to 0.1 Pa in the atmosphere, and from 60 minutes to 5.0 × 10-4 Pa.

5. Capacity: Can accommodate a sample weight of no less than 10Kg.

6. Pressure measurement range: 1.0 × 10-3Pa to 3.0 × 105Pa.

2.2.2 Heating

1. Maximum heating temperature: 2200 ℃

2. Temperature control accuracy: ± 2 ℃

Other requirements

1. External dimensions: The overall equipment is less than 2.5 * 1.5 * 1.8 meters, and the equipment can be designed as a detachable structure to meet this requirement

2. Effective practical size: 300mm × 300mm × 400mm

3. Release valve: 1 × KF16

4. Noise: meets the noise standards for industrial sites

Structure and installation requirements

The vacuum heat treatment equipment should be placed independently and clearly labeled to facilitate manual connection guidance.

Interface requirements

Using standard vacuum sealed flanges.

Product coating and labeling requirements

A nameplate should be installed in a prominent position outside the equipment, which includes the product name, model, factory number, date of manufacture, and manufacturing unit.

The vacuum melting furnace system is mainly divided into four parts: vacuum system, heating system, electric control and cooling system.

The vacuum melting furnace system is a high vacuum molybdenum gall heating distance front door equipment. The vacuum container is mainly made of high-quality S30408 stainless steel. In order to prevent burns to the human body caused by high temperatures, the container is made into two layers, with the middle layer used for water cooling. All pumping equipment is installed inside the instrument, and the vacuum and heating systems are operated on a tablet computer above the control cabinet. This system integrates vacuum heating into one, improving the integration and stability of the system. The operation is simple and convenient, and the system also has certain expandability and redundancy for subsequent functional expansion. The core of vacuum degree and temperature equipment control is the system.

It consists of two main parts: the furnace body and the furnace cover.

1. The furnace body is made of 304 stainless steel or materials with equivalent or better performance, and is connected by fluorine arc welding or equivalent or better connections. The surface is polished and has a double-layer water-cooled structure to ensure that the quality of the outer surface of the furnace shell does not exceed 60C during operation;

2. The furnace cover is equipped with a locking device, and there is an observation window on the furnace cover that can observe the refining situation inside the furnace. The observation window has a filter function to protect the eyes:

3. The furnace body is equipped with vacuum extraction interface, power inlet and water inlet interface, protective atmosphere filling interface, exhaust port with one-way valve, etc.

4. Cold signal reporting limit: straight pipe ≤ 1.0 × 10-2Pa, the system can reach 5 × 10-1Pa after 60 minutes of pumping from the atmosphere, and the pressure rise is not greater than 1Pa/H

5. The overall leakage rate is ≤ 2.0 × 10-9Pam3/s.

6. Maximum operating pressure ≥ 0.3MPa (absolute pressure)

Vacuum system

The direct air system consists of molecular deep, oil-free dry nanobodies, high vacuum gates, pipelines, joints, and control units.

1. Under cold and no-load conditions, the system starts to extract air from the atmosphere and can reach 2Pa in 30 minutes and 5.0 * 10-1Pa in 60 minutes

2. A high vacuum valve is installed between the vacuum system and the high vacuum chamber, with a leakage rate of ≤ 5.0x10-11Pa.m3/s and a pressure range of 0.5MPa (absolute pressure);

3. Control unit: Implement automatic sequential action of the vacuum system to provide safety interlock function.

The vacuum chamber is made of S304 stainless steel cold-rolled plate laser cutting and then rolled into a circular shape. The chamber is double layered, and the middle layer is cooled by water as a whole. Round the cavity and ensure that the roundness is less than 3mm after splicing and welding. Polish the double-sided grooves during straight welding, pay attention to penetration during welding, and there should be no air pockets. Before welding, adapt to the head and flange to ensure that there are no steps after docking. There are water-cooled electrode interfaces, molecular pump interfaces, gauge tube interfaces, vent valve interfaces, thermocouples, and observation windows on the vacuum chamber. The observation window has a diameter of 50mm. In order to facilitate the installation of heating, tracks are welded on both sides of the inner wall of the vacuum chamber. Polish and round all flying edges and right angles during the production process. (Please call our company for specific information!)