Supply basic consumables for X-ray tubes-rotating anode, fixed anode, rotor

一、Main components of X-ray tube

1. X-ray tube is mainly composed of cathode, anode and rotor:

·Cathode-tungsten filament (CATHODE FILAMENT) in the focusing cup;

·Anode-rotating anode target surface during X-ray exposure (ANODE TARGET);

·Rotor-A device that rotates the anode.

When a low voltage current is applied to the cathode, electrons are generated, which heats the filament and generates a cloud of electrons. A high voltage is then applied to accelerate the electrons through the tube to the anode. Collision with the anode results in 99% of the heat and 1% of the electrons being converted to X-rays.

2. Application fields of rotating anode X-ray tube:

According to different application areas, rotating anode X-ray tube applications can be divided into industrial and medical two categories, of which medical is the largest application area of rotating anode X-ray tube, the application accounted for more than 86.3. In the medical field, the rotating anode X-ray tube is the main component of X-ray diagnosis and detection equipment, and is widely used in mobile DR, CT, mobile C- arm and other systems; in the industrial field, the rotating anode X-ray tube is widely used in CT scanners, film exposure equipment, industrial testing equipment.

In short, rotating anode X-ray tubes are widely used in medical, electronic, security, non-destructive testing and other fields.

 

二、Classification of anodes

The X-ray tube anode can be divided into a rotating anode target disc and a fixed anode head.

1) Rotary anode target disc

The rotating X-ray anode produced by our company is composed of molybdenum alloy matrix and tungsten rhenium alloy, and can provide blackening coating and sandblasting treatment according to demand.

The rotating anode target is the anode of the X-ray tube. As the core component of the X-ray tube, its function is to receive electron bombardment to generate X-rays and release heat at the same time. Because tungsten has a high melting point, low vapor pressure, and can generate X-rays when irradiated by a high-speed electron beam, it is often used as a target surface material in the anode target of various X-ray tubes, and the addition of rhenium can make the target material have the advantages of high strength, toughness, heat resistance and high precision.

Tungsten has a high melting point and can generate X-rays when irradiated by a high-speed electron beam, so it is often used as an X-ray source for various X-ray tubes, while a tungsten-rhenium target has the advantages of high strength, toughness, heat resistance, and high precision, and supports a high-power electron beam, and is often used for medical X-ray tubes. At the same time, tungsten rhenium target is also widely used in magnetron sputtering.

The rotating anode target is prepared by powder metallurgy method, and the uniformity of tungsten and rhenium is ensured by process control.

Our rotating anode target Products of Features

1. Good ray generation rate.
2. Due to the application of TZM alloy matrix, supporting its rotating rotor bearing load is small, increase the service life of the tube.
3. "Rhenium effect" reduces the sensitivity of the incision of the working face and increases the melting resistance. Rhenium has a good uniformity.
4. The joint surface is firm.
5. High density.
6. The use of solid-liquid mixing method to improve the uniformity of rhenium, our company uses solid-liquid mixing method to improve the uniformity of rhenium, while through multiple forging and annealing to improve the density and improve the organization, improve the performance and life of the anode target.

Product Parameters

	Pure tungsten targets	Pure molybdenum target	Molybdenum-based tungsten target	Molybdenum-based tungsten-rhenium  target
Diameter	∅30-200mm	∅ 52.5-185mm	∅ 52.5-185mm	∅52.5-102mm
Thickness	4-30mm	7-21mm	7-21mm	7-21mm
target angle	0 °-20 ° on demand	6 °-18 ° on demand	6 °-18 ° on demand	6 °-18 ° on demand
Rhenium content (wt %)	—	—	—	0-10

Making anode target discProcess flow:

Powder blending → pressing → sintering → forging → annealing → machining → dynamic balancing → vacuum degassing → packaging

2) Fixed anode

1. Introduction of fixed anode X-ray tube:

Fixed anode X-ray tube X-ray generating device, its anode is fixed, rather than rotating. Such X-ray tubes are commonly used in the fields of medical diagnosis, industrial inspection, material analysis, etc.
The fixed anode X-ray tube is mainly composed of a cathode and an anode. The cathode is a metal wire that emits electrons, and the anode is a surface made of a high-melting metal such as tungsten or molybdenum. Under the action of the high-voltage electric field, the electrons emitted by the cathode are accelerated to a high speed, and then hit the surface of the anode, producing X-rays.
The advantages of fixed anode X-ray tube are simple structure, stable and reliable, long life and easy maintenance, but the disadvantage is that the output power of X-ray is low, usually only about 1/3 of that of rotating anode X-ray tube. In addition, since the anode surface is fixed, its surface utilization is low, and only about 20% of the anode surface can be used to generate X-rays.

2. Fixed anode

The fixed anode produced by our company adopts back casting method to combine tungsten and copper. The bonding surface is tight and seamless, ensuring excellent heat dissipation capacity. According to customer requirements, doped tungsten and tungsten rhenium can be selected as the target surface. The bonding interface of tungsten and copper is detected by industrial non-destructive testing. The powerful machining capability and detection means ensure the dimensional accuracy of the fixed anode, and ensure high purity through raw materials and process control.

Because our superb copper-tungsten bonding technology has won the admiration at home and abroad, the products are exported to domestic and foreign markets, and have been well received by customers. Moreover, our company also provides a large number of semi-finished products for domestic and foreign factories.

The following is a product case of our company providing fixed anode semi-finished products and finished products as required:

 

3. X-Ray Tube Accessories-Rotor

1) The rotor structure includes:

1. The rotor body is a cylindrical body with two ends open;

a metal rotor base, which is welded to one end opening of the rotor body through an inert gas protection and blocks one end opening;

2. A first rotating shaft, one end of which is mounted with a target for generating radiation, and the other end of which is detachably mounted on the rotor base. the rotor assembly comprises a rotor structure;

3. A bearing assembly disposed within the rotor body for supporting the rotor structure for rotation.

The rotor produced by our company can also provide blackening service according to the needs of customers. The rotor components are closely combined with advanced technical equipment and vacuum gas furnace, providing high-quality and high-performance products to the majority of users, which has won the unanimous praise of customers.

 

Other accessories 4. X-ray tube anode

According to the company's years of production and research and development, our company can not only produce excellent X-ray tube anodes and rotors, but also provide other corresponding metal accessories, such as molybdenum elements, molybdenum nuts, molybdenum rods, molybdenum wires, anode caps, tungsten square pieces, tungsten element pieces, etc.