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[China]
Trade Verify
Address: 7th Floor, Chengyuan Building B, the Mid. Road of Jiancaicheng Haidian Dist.BeiJing,CHINA 100096
Contact name:Shifen Yuan
HUATEC GROUP CORPORATION |
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Verified Suppliers
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Test Hardness Of Metal Or Ceramic Materials Directly In High-Temperature Vickers Hardness Tester
1.Scope of application:
Given that materials such as metals, ceramics, and agate are subjected to varying final working environments, their hardness undergoes corresponding changes with shifts in environmental temperature. In order to address the challenge of conducting consistent hardness tests on the same materials across different temperature conditions, our company has taken an innovative approach. We have augmented the conventional hardness tester with a high-temperature system, enabling the simulation of diverse working environments characterized by varying temperatures. This enhancement facilitates the collection of material hardness data, thereby augmenting the reference value and reliability of our experimental findings.
2.Host system:
The external computer control system enhances user-friendliness, allowing for effortless operation. This system facilitates online testing, enabling the comprehensive acquisition of necessary data in real-time.
Mainframe Parameters:
| Objective lens/indenter switching | Automatic switching between objective lens and indenter |
| Turret drive type | Stepper motor-driven copper gear drive |
| Test force | Standard equipment:0.5, 1, 2, 2.5, 3, 5, 10 , 20, 30, 50kg Selectable:0.2, 0.3, 0.5, 1, 2, 2.5, 3, 5,10kg |
| Loading method | Fully automatic loading, holding and unloading program control |
| Load-holding duration. | 5-60 steps with a duration of 5 seconds each. |
| Range of hardness measurement. | 5 HV – 3000 HV or higher |
| High-temperature compression rods. | Silicon nitride (or heat-resistant steel) |
| Objective lens | 10X, 20X |
| X-Y testing platform. | Size: 120 × 120mm Maximum movement: 8 × 8mm Minimum reading: 0.01 mm |
| Method of measurement reading. | Input diagonal length, computer-based online automatic reading. |
| Software automation | The computer can manage the loading, unloading, and holding time of the hardness tester, as well as automatically detect the test force. |
| Maximum specimen dimensions. | φ15*10mm |
| Distance from the center of the indenter to the wall. | 135mm |
| Implementation standard (or reference) | GB/T 4340;ISO 6507;ASTM E384;JIS B7734 |
| Power source. | 220 VAC, 50/60 Hz |
3.High-temperature systems:
Heating element: Heating with silicon molybdenum rods is characterized by stable temperatures and minimal overshoot.
High Temperature Furnaces:The furnace body's heat insulation involves lining it with polycrystalline mullite ceramic fiber, which yields excellent insulation, aesthetics, durability, and straightforward installation and upkeep. Additionally, a thermal barrier coating is applied to the interior of the stainless steel furnace body, ensuring optimal heat insulation protection.
Hot plate for specimens:Silicon nitride ceramics are employed due to their notable attributes, including exceptional high-temperature resistance and a low coefficient of expansion.
Heating switch:The heating system employs a switching power supply (12V, 200A). While its individual cost surpasses that of the traditional transformer, it boasts superior stability, reliability, compactness, and reduced weight. These attributes outshine those of the conventional silicon-controlled power supply. The system also demonstrates advantages such as high power utilization and immunity to electromagnetic signal interference in the vicinity. Additionally, it incorporates a floating ground feature within the switching power supply, thereby maximizing the assurance of user safety during operation.
Water cooling protection:Incorporating a constant temperature control chiller, the furnace body's outer wall is constructed with dual-layer stainless steel, forming a water-filled cavity that enables temperature regulation up to a maximum of 40°C. This constant temperature control chiller effectively sustains the furnace body's consistent temperature. It not only guarantees the stability of the outer furnace surface temperature but also serves to stabilize and finely adjust the internal furnace temperature. This refinement ensures greater precision in furnace temperature, ultimately enhancing the accuracy of the testing process.
High temperature furnace parameters:
| Temperature range | Normal temperature～1000℃ (specimen temperature) |
| Heating speed | 50℃/min |
| Temperature display accuracy | ±1℃ |
| Furnace size | Configured based on the specimen size, with a maximum specimen size of 15mm. |
| Temperature setting | Set the target temperature as desired. |
| Thermocouples | PtRh-Pt (Type S), thermal response time <2s |
| Heating element | Silicon molybdenum rod |
4.Image Acquisition System:
The system is designed for processing hardness images in Vickers indentation measurements, encompassing tasks such as measurement, statistical analysis, data storage, and result output.
The software automatically generates and displays indentation test result curves, depth curves, error statistics, and group statistics for the number of tests.
Technical Parameters:
| Image sensor | CMOS(colorful) |
| Effective pixel | 1.3 million |
| Imaging area | 6.55(H)×4.92(V)mm 1/2 type |
| Scanning method | Line-by-line scanning |
| Mirror Image Inversion Function | Sensor horizontal and vertical flipping |
| Pixel size | 3.2(H)×3.2(V)μm |
| Shutter mode | Roll-up curtain |
| Color scheme | RGB bayar arrangement |
| Frame rate | 12fps |
| Electronic shutter | 1/19688～0.832s ※24MHz drive clock |
| Connector | USB 2.0 Bulk Transfer |
| Synchronization method | Internal synchronization |
| Lens mount | C bayonet |
5.Purification Circulation System:
A closed working environment is established through a box and gas purification system. Inert gas, such as argon or nitrogen, is introduced into the box to displace and cycle out active substances. This process ensures the maintenance of a highly clean and pure inert gas environment, with levels of water and oxygen reaching below 0.1 ppm in the equipment. This setup doesn't compromise the hardness tester's force value or measurement accuracy. Moreover, it serves to safeguard specimens from oxidation during the heating process.
1)Product Features and Benefits
Very low system leakage rate:
The glove box adheres to a factory standard leakage rate of <0.005 VOL%/H, with the measured leakage rate falling below <0.001 VOL%/H—significantly surpassing the international benchmark of <0.05 VOL%/H. The system employs an oxygen method, equipped with automatic leakage rate detection functionality.
Three testing programs are employed to thoroughly assess the complete system after assembly:
2)Main parameters
