Vacuum Heat Treatment Furnace Buying Guide

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Vacuum heat treatment furnace is an advanced heat treatment equipment that can perform various heat treatments such as vacuum heating, quenching, tempering, annealing, carburizing, nitriding, pressurized gas quenching of metal materials and workpieces, as well as powder metallurgy sintering, Aerospace workpiece brazing, etc., the vacuum heat treatment process can significantly improve the properties of the processed materials and workpieces, and the materials can be fully utilized. Therefore, in a broad sense, the vacuum furnace is an advanced heat treatment equipment that significantly saves unit energy consumption.

1. Process overview
The process, material, shape, size, specification, quantity, batch, process status, organizational requirements, performance requirements, characterization requirements and quality management requirements of the relevant parts that need to be subjected to vacuum heat treatment for vacuum heat treatment objects. Site conditions, personnel conditions and the actual status of related supporting conditions, put forward the relevant technical requirements for the vacuum heat treatment furnaces to be purchased, organize technical personnel to conduct sufficient research and inspections on the vacuum heat treatment furnaces in the industry, and propose the purchase of vacuum heat treatment furnaces Plan, organize the technical person in charge of the company to review the procurement plan; carry out specific procurement work, and conduct comprehensive technical indicators acceptance of the purchased vacuum heat treatment furnace, including pre-acceptance and final acceptance and acceptance of process tests, quality assurance, quantity assurance, Complete tasks on schedule.

2. Purchase of vacuum furnace and supporting facilities
2.1. Selection of furnace type and size
First of all, according to the needs of actual production, it is proposed what kind of vacuum heat treatment furnace to purchase. If it is a single vacuum heat treatment furnace or multiple vacuum heat treatment furnaces, whether it is a vacuum heat treatment furnace production line or a vertical vacuum heat treatment furnace, whether a horizontal vacuum heat treatment furnace is a single-chamber vacuum heat treatment furnace or a multi-chamber vacuum heat treatment furnace, etc.
Secondly, according to the needs of the actual process, it is proposed what kind of vacuum heat treatment furnace to purchase. Such as vacuum oil quenching furnace or vacuum air quenching furnace, vacuum annealing furnace or vacuum tempering furnace, vacuum carburizing furnace or vacuum nitriding furnace, etc.
Third, according to the actual production volume needs, and combined with the actual production capacity of vacuum heat treatment, it is proposed to purchase the number of relevant vacuum heat treatment furnaces.
Selection principle: According to the actual needs of the actual process, the main functions of the vacuum heat treatment furnace that need to be purchased are proposed. In addition to being reasonable, practical, reliable, stable and safe, function selection should also be forward-looking and adapt to possible future processes.

2.2. Selection of specific technical parameters of vacuum furnace
Main technical indicators of vacuum heat treatment furnace
Common technical indicators of vacuum heat treatment furnaces include: effective working area size, maximum furnace capacity, maximum temperature, common working temperature, furnace type, configuration of related accessories, effective working area size, furnace temperature uniformity, system accuracy, ultimate vacuum degree , Working vacuum, pressure rise rate, pumping rate, heating rate, cooling rate, cooling method and cooling capacity, partial pressure control function and gas quenching pressure, etc.

Analysis of Processing Objects
The processing object, that is, the process requirements of the relevant parts, should be clearly defined, including: material, shape, size, specification, quantity, batch, process status; organizational requirements, performance requirements, characterization requirements and quality management requirements that need to be met after processing. requirements, so as to determine the size of the furnace body, technical parameters and configuration.

Process route and process parameters
According to the workpiece production route, determine the exact position and requirements of the process carried out by the vacuum heat treatment furnace in the entire process route; secondly, determine the correlation between the front and rear processes, so as to determine the technical requirements and operation methods.
According to the above analysis conditions, the process parameters of the vacuum furnace are determined, so as to correctly select the vacuum furnace facilities.

2.3. Supporting facilities
In order to meet the production needs, in addition to the vacuum furnace body, there must be corresponding facilities for normal production. Supporting facilities include: cooling tower (used for furnace cooling water), gas quenching gas source (gas tank, gas station, etc.), oil quenching medium (suitable for vacuum oil quenching furnace), workpiece transportation equipment, tooling fixture, rear Processing equipment (such as ultrasonic cleaning machine for cleaning oil quenching residues), testing equipment (regular inspection of furnaces, and inspection of workpieces after production), relevant technical personnel, etc.

2.4. Site conditions
The vacuum heat treatment furnace to be purchased should be equipped with the following supporting conditions: power distribution conditions, electrical wiring conditions, water distribution conditions, water quality conditions, gas distribution conditions, ten construction conditions, resettlement location and area conditions, hanging conditions, environmental requirements ( temperature, humidity, cleanliness, explosion-proof, etc.), tooling and fixture conditions and safety conditions, etc.

2.5. Budget
According to the actual production and process needs, put forward the specific requirements of the design plan of the direct air heat treatment furnace to be purchased, the requirements of the technical indicators of the vacuum heat treatment furnace and the necessary supporting conditions, etc., and carry out the budget for this project (purchased vacuum heat treatment furnace). .

2.6. Manufacturer’s brand selection
List two or three manufacturers to be recommended, and analyze the production capacity, supply capacity, after-sales service capacity and spare parts supply capacity of different equipment manufacturers by comparing the capabilities of each manufacturer. Whether it has good equipment and technology, a complete quality assurance system (with the approval and authorization of relevant international or domestic authoritative departments), relevant qualifications and authorizations for the design and production of pressure vessels recognized by the government, corresponding testing methods, Conditions and means for debugging the equipment in the hot and cold state.

Manufacturers should generally have more than 5 years of manufacturing and production experience, and more than 5 years of sales history. At the same time, it has the ability to design and produce related vacuum heat treatment furnaces, has the actual performance of sales of related vacuum heat treatment furnaces, and can provide detailed information on related vacuum heat treatment furnaces, test reports of key technical indicators and related application documents.

3. Procurement and acceptance

According to the needs of actual production and the actual process, according to the characteristics of the vacuum heat treatment process parameters to be carried out in the vacuum heat treatment furnace to be purchased, combined with the technical index parameters that the vacuum heat treatment furnace to be purchased must meet, through full consultation with the manufacturer. The above requirements are converted into the design plan of the vacuum heat treatment furnace to be purchased; through the full investigation and inspection of the vacuum heat treatment furnace in the similar industry, the experience and lessons of the relevant users are summarized, and the preliminary demonstration is carried out. The feasibility study report of the vacuum heat treatment furnace to be purchased; through further technical communication and technical discussions with the designer of the manufacturer, the feasibility of the design and manufacture of the vacuum heat treatment furnace to be purchased can be realized; Pre-acceptance (after the inspection and test meet the technical requirements of the relevant clauses, the manufacturer can ship the equipment after the representatives of both parties sign the pre-acceptance report.), final acceptance (equipment test and acceptance must be in accordance with relevant international standards and specifications and when the seller wins the bid The provided technical parameters and the buyer’s processing requirements are carried out.

The buyer’s representative has the right to participate in the relevant acceptance tests, and the seller shall submit the test data and reports to the buyer’s acceptance representative. The main parts, raw materials, original materials and inspection records of the equipment are available for the buyer to review during acceptance. When all contract equipment parts supplied by the seller leave the factory, the product quality certificate and the factory test record signed by the seller’s special testing personnel shall be the quality certification documents of delivery. Regardless of whether the Employer requests and knows, the Seller is obliged to provide the Employer with the major quality defects and problems in the manufacturing process of the contract equipment in a proactive and timely manner, and shall not conceal them. Manufacturers must provide relevant international or enterprise standards, norms and methods for equipment testing and acceptance. Acceptance criteria shall be carried out in accordance with international general standards or other standards and methods recognized by both parties. The final acceptance project, acceptance content, acceptance plan, acceptance requirements, etc. depend on the acceptance agreement signed by both parties. The process verification test is generally not less than 3~5 process tests of the whole process, and the process test is a typical process test of the buyer, so as to realize the feasibility of the vacuum heat treatment process to be carried out by the vacuum heat treatment furnace to be purchased.

SIMUWU focuses on the production of equipment suitable for vacuum heat treatment processes. Including RVGQ vacuum air quenching furnace and VOGQ vacuum oil quenching furnace, as well as tempering furnace and annealing furnace, etc., are widely sold all over the world. It has the characteristics of high degree of automation, excellent heating performance, affordable and durable. SIMUWU has nearly 20 years of experience in vacuum furnace manufacturing and sales, and is equipped with a professional after-sales team of engineers, which can effectively meet the processing and production needs of major companies.