"Process-Scenario-Oriented Design" of Shanghai Guanding Vacuum Sintering Furnaces

In Shanghai's aerospace titanium alloy component factories, automotive powder metallurgy workshops, and precision hardware bearing production lines, selecting a vacuum sintering furnace is never as simple as "comparing ultimate vacuum degree or competing for maximum temperature" — sintering of aerospace titanium alloy powder requires "hydrogen reducing atmosphere + stepwise temperature rise"; otherwise, the components are prone to coarse grains. Sintering of automotive iron-based gears demands "stable vacuum below 1Pa throughout the process"; even slight fluctuations will cause oxidation on the gear surface. Sintering of precision hardware parts requires "temperature difference within the furnace ≤ ±2℃"; otherwise, uneven density will accelerate wear.

With over 10 years of in-depth experience in the vacuum thermal engineering field, Shanghai Guanding Industrial Equipment does not define vacuum sintering furnaces as "general-purpose vacuum extraction devices". Instead, it takes "the process scenarios of Shanghai enterprises" as the core and creates customized Shanghai vacuum sintering furnaces featuring "stable vacuum + precise temperature control + flexible space + atmosphere adaptation". This enables the equipment to proactively adapt to production needs, rather than forcing production to adapt to the equipment.

I. Three Misconceptions About General-Purpose Vacuum Sintering Furnaces: Why Are They Hard to Adapt to Shanghai Scenarios?

When purchasing vacuum sintering furnaces, most enterprises are easily attracted by superficial parameters such as "ultimate vacuum of 0.1Pa" and "maximum temperature of 1600℃", but overlook the core needs of Shanghai's industrial scenarios, falling into misconceptions:

Misconception 1: Focusing Only on "Ultimate Vacuum" While Ignoring "Full-Process Stability"

Technical Specifications for Powder Metallurgy Sintering Furnaces (JB/T 10966-2010) clearly stipulates that "the fluctuation of vacuum degree throughout the sintering process shall be ≤ ±0.5Pa". General-purpose furnaces emphasize "instantaneous ultimate vacuum" but fail to optimize the sealing structure and vacuum system linkage control, making them unable to meet the core requirement of "isolating oxygen throughout the process" for metal powders, thus becoming a quality hazard.

Misconception 2: Single-Section Fixed Temperature Control, Ignoring "Differences in Process Curves"

Sintering curves vary significantly among different materials: titanium alloy requires "300℃ degassing - 1200℃ sintering - 800℃ slow cooling", while iron-based powder needs "500℃ preheating - 900℃ constant temperature - 600℃ cooling". Technical Requirements for Metal Powder Sintered Parts (GB/T 19078-2009) clearly specifies the heating rate and holding time for each material. The "single-section temperature control design" of general-purpose furnaces lacks curve programming functionality, making it impossible to match the process characteristics of different materials and directly affecting the mechanical properties of sintered parts.

II. Shanghai Guanding Vacuum Sintering Furnaces: Four Scenario-Oriented Designs to Address Core Pain Points

Taking the process needs and scenario constraints of Shanghai enterprises as the anchor, Guanding creates customized solutions from four dimensions (vacuum, temperature control, space, and atmosphere), ensuring each vacuum sintering furnace "works well immediately after installation":

1. Vacuum System: From "Instant Compliance" to "Full-Process Stable Vacuum", in Line with JB/T Standards

To meet the oxygen prevention needs of metal powders, Guanding optimizes the design in accordance with JB/T 10966-2010:

• Dual-Stage Pump Set Linkage: Adopts a "roots pump + molecular pump" dual-stage vacuum unit, equipped with a real-time vacuum degree monitoring sensor. When the vacuum degree fluctuation exceeds the limit, a backup pump is automatically activated for supplementary pumping, ensuring stable vacuum throughout the sintering process;

• High-Temperature Resistant Sealing Structure: The furnace flange uses a copper-clad graphite gasket (temperature resistance up to 800℃), and the furnace chamber interface is treated with "double-sealing" to prevent leakage at high temperatures;

• Leakage Early Warning Protection: A pre-installed vacuum leakage detection module automatically shuts down the equipment and alarms when the leakage rate exceeds the limit, avoiding batch workpiece scrapping due to oxidation.

2. Temperature Control Module: Multi-Curve Programming + Multi-Zone Uniform Temperature, Adapting to Different Materials

To address the differences in process curves of different materials, Guanding builds a "precisely adjustable" temperature control system:

• Multi-Curve Storage and Calling: Equipped with a 7-inch touchscreen, it can store more than 10 sets of sintering curves (with exclusive curves for titanium alloy, iron-based, and copper-based materials respectively). The heating rate is adjustable, fully complying with the requirements of GB/T 19078-2009;

• Multi-Zone Independent Heating: The furnace body is divided into 3 independent heating zones (upper, middle, and lower). Each zone is equipped with a Class A platinum resistance sensor, and the temperature difference within the furnace is controlled to be ≤ ±3℃ through PID intelligent temperature control. A high-temperature circulation fan (temperature resistance up to 1400℃) is installed inside the furnace, and the hot air path is optimized with an annular deflector to ensure uniform temperature.

3. Atmosphere Adaptation: Multi-Gas Compatibility, Meeting High-Performance Needs

For materials requiring protective atmosphere such as aerospace titanium alloy and stainless steel, Guanding integrates the "atmosphere synergy" function:

• Multi-Gas Compatibility Control: Supports three types of gases (nitrogen for oxidation prevention, hydrogen for reduction, and argon for inert protection), and is equipped with a gas purity filtration device (filtration accuracy of 0.1μm) to prevent impurities from affecting sintering quality. The gas flow rate is adjustable from 0 to 50L/min and is linked with the vacuum system (e.g., before introducing hydrogen, the vacuum is pumped to 10Pa to remove air, complying with Safety Technical Specifications for Special Industrial Furnaces (GB 50677-2011));

• Environmental Protection and Energy Saving: A hydrogen recovery device is installed at the tail of the furnace to reduce gas waste. A built-in waste heat exchanger lowers the exhaust gas temperature from 600℃ to below 150℃, increasing thermal efficiency to over 85%, which is in line with Shanghai's "dual carbon" policy — after an aerospace factory in Fengxian adopted it, energy consumption costs decreased significantly.

References

1. Technical Specifications for Powder Metallurgy Sintering Furnaces (JB/T 10966-2010)

2. Technical Requirements for Metal Powder Sintered Parts (GB/T 19078-2009)

3. Safety Technical Specifications for Special Industrial Furnaces (GB 50677-2011)

4. Industrial Resistance Furnaces (GB/T 30835-2014)

5. Stainless Steels and Heat-Resisting Steels — Designations and Chemical Compositions (GB/T 20878-2021)

6. General Technical Conditions for Industrial Electric Heating Equipment (GB/T 10067.1-2005)

When selecting a vacuum sintering furnace in Shanghai, the key is to "find a partner who understands the process and can adapt to local scenarios". For 10 years, Guanding has only focused on "Shanghai scenario-adapted" vacuum sintering furnaces, rather than making do with general-purpose models. From atmosphere control for aerospace titanium alloy, to vacuum stability for automotive iron-based materials, and to space adaptation for old workshops, each piece of equipment is tailored to the needs of Shanghai enterprises.

If you are struggling with "unstable vacuum, inaccurate temperature control, or insufficient space" when choosing a vacuum sintering furnace, feel free to call Guanding's Shanghai service hotlines (18930058003, 13167263268) or visit the Songjiang base for an on-site inspection — let the "vacuum sintering furnace that understands Shanghai's industry" help you achieve worry-free commissioning and compliant production.

Tags: Shanghai Vacuum Sintering Furnace | Guanding Vacuum Sintering Furnace | Vacuum Sintering Furnace | Titanium Alloy Vacuum Sintering Furnace | Iron-Based Powder Vacuum Sintering Furnace | Shanghai Industrial Vacuum Equipment| Guanding Vacuum Sintering Furnace | Vacuum Sintering Furnace | Titanium Alloy Vacuum Sintering Furnace | Iron-Based Powder Vacuum Sintering Furnace | Shanghai Industrial Vacuum Equipment