Energy-saving: The design of aluminum alloy three-in-one heat exchanger minimizes the process loss of cooling capacity and improves the recycling of cooling capacity. Under the same processing capacity, the total input power of this model is reduced by 15~30%.
Efficient: The integrated heat exchanger incorporates a flow guiding fin to make the compressed air exchange heat evenly inside. It is oil-free, water-free and dust-free. The built-in gas-water separation device is equipped with a stainless steel filter to make the water separation more completely.
Intelligent: Multichannel temperature and pressure monitoring, real-time display of dew point temperature, automatic recording of accumulated running time, self-diagnosis function, display corresponding alarm code, and automatic protection of equipment.
Environmental protection: In response to the international Montreal agreement, all models in this series use R134a and R410a environmentally friendly refrigerants, which have zero damage to the atmosphere and adapt to the needs of the international market.
Stable: standard constant pressure expansion valve, standard intelligent temperature control, laboratory test, when the intake air temperature reaches 65 ° C, the ambient temperature reaches 42 ° C, it is still stable operation, with temperature and pressure double antifreeze protection, and When the engine is operated for a long period of time, the output of the compressor is automatically stopped, and the amount of cooling stored by the aluminum plate is exchanged to provide heat exchange. Extend the life of the equipment while saving energy.
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The base material plays a crucial role in the performance of a screw tap, directly affecting its **quality and durability**. However, it's not just about the material itself—other processes also play a significant role in shaping the tool’s characteristics and overall performance. Since the surface is the part most exposed to wear and corrosion, most screw taps undergo **surface treatments or receive coatings** before being sold.
Surface treatments and coatings offer a range of benefits. They enhance **resistance to wear and environmental factors**, which can significantly extend the life of the taps. Additionally, they improve surface quality and allow for higher cutting speeds. Some coatings are tailored for specific applications, making them ideal for use with special materials.
Today, there are many types and combinations of coatings available for screw taps. You can also request custom solutions from manufacturers like BAER. In this article, we aim to provide clarity on the wide variety of **tap coatings** and help you choose the best option for your needs.
### The Most Common Surface Treatments
Surface treatments modify the **material properties** of the tap without adding any new layers. Below are some of the most commonly used methods:
#### Nitriding
Nitriding involves exposing the screw tap to a nitrogen-rich environment at high temperatures, forming a hard, wear-resistant surface layer. This treatment is especially effective for materials like cast iron, high-perlite steels, titanium alloys, and certain aluminum-silicon alloys. It improves hardness, wear resistance, and sliding properties.
#### Vaporizing
Vaporizing is a steam-based process that creates a crystalline iron oxide layer on the tap’s surface. This reduces friction and helps lubricants adhere better. However, this method is only suitable for iron-based materials.
#### Calduring
Calduring combines nitriding and vaporizing, offering the benefits of both processes. It’s particularly useful when working with tough and abrasive materials.
#### Hard Chromium Plating
This process applies a hard chrome layer through electrolytic deposition, improving sliding properties and reducing surface roughness. It’s often used for soft materials like copper and copper alloys, but must be applied at temperatures below 250°C.
### The Most Common Screw Tap Coatings
For improving surface properties, **coatings** are often the most eco-friendly and cost-effective solution. One widely used method is **PVD (Physical Vapour Deposition)**, which involves depositing a thin coating in a vacuum environment.
#### PVD Process
PVD is a vacuum-based technique where the coating material is first vaporized and then deposited onto the tool. This results in a strong, uniform coating that enhances performance.
#### TiN (Titanium Nitride)
TiN gives the tap a gold-yellow color, with a micro-hardness of 2,200 HV and temperature resistance up to 600°C. It’s a general-purpose coating suitable for a wide range of materials, including steels, cast iron, and non-ferrous metals. Tools with TiN can be recoated up to five times.
#### TiCN (Titanium Carbonitride)
TiCN is extremely hard and durable, performing well under high mechanical stress. It has a micro-hardness of 3,000 HV and a maximum temperature resistance of 400°C. It’s ideal for high-strength steels and abrasive materials, though it has limited heat resistance.
#### TiAIN (Titanium Aluminum Nitride)
TiAIN is black-violet in color, with a micro-hardness of 3,300 HV and a temperature resistance of up to 800°C. Its high chemical stability and heat resistance make it perfect for high-speed cutting and difficult-to-machine materials. Like TiN, it can also be recoated multiple times.
#### Other Coatings
Other options include the red-violet X. TREME coating, which combines the advantages of TiN, TiCN, and TiAIN, and CrN (Chromium Nitride), known for its excellent thermal stability and corrosion resistance.
If you're still unsure about which surface treatment or coating is right for your project, feel free to reach out. Our team at BAER is here to help you find the best solution. All these options are available in our online shop, or we can produce custom-coated taps based on your specifications. Let us support your next project!