Blue Zirconia Ceramic Guide / Welding Pin With Extremely High Wear Resistance

Blue Zirconia Ceramic Guide / Welding Pin With Extremely High Wear Resistance

1 . Description

High Hardness Si3N4 Positioning Pin Silicon Nitride Ceramic Dowel Pin for Welding refers to a type of ceramic dowel pin that is used in welding applications. It is made of a material called silicon nitride (Si3N4), which is known for its high hardness, strength, and resistance to wear and corrosion.

These ceramic dowel pins are used to precisely align and position parts during the welding process, ensuring a high degree of accuracy and consistency. They are typically used in resistance welding and other types of welding applications where precision and repeatability are critical.

The high hardness of silicon nitride ceramic makes it ideal for use in welding applications, as it can withstand the high temperatures and pressures generated during the welding process. It is also non-conductive, which helps to prevent electrical arcing between the dowel pin and the workpiece.

In order to meet the growing demand for welding processes, we deliberately introduced nano-blue zirconia raw materials imported from Germany in 2013, using advanced hot isostatic pressing and sintering (HIP) and CNC grinding, supplemented by diamond polishing. The nano-welding locating pin and the limit pin with high precision, high strength, high toughness, high wear resistance, high corrosion resistance and high temperature resistance are prepared, and the durability is 40 times of that of the steel. It is the pin of the Japanese KCF material. More than double.

The locating pin of the nano-zirconia material exhibits the advantages of ultra-high performance when directly contacting the welding material:

-Extremely high wear resistance, the wear is more than three times that of steel in the same environment; Good rigidity and good shape retention. During use, even if there is a large impact force, deformation will not occur;

- Never stick to slag. Due to the unique non-wetting properties of the nano-ceramics, the spattered slag will not stick to the pins during the welding process, and no cleaning or other treatment is required.

- non-conducting, electrically insulating, the voltage can reach millions of volts without breaking through the conduction;

- It can withstand extremely high working temperatures. It still shows excellent stability when the temperature reaches 1200 °C. More importantly, the material has very good thermal shock resistance, that is, the temperature is short during welding. It will rise to seven or eight hundred degrees or above, or it will naturally cool in the air after welding, and the material will not break.

2 . Silicon Nitride Ceramic Properties

Silicon Nitride Ceramic Properties Color: Gray and Gray-black

Density: 3.2~3.25 g/cm3

Hardness: HRA 92~94

Highest Operating Temperature: 1300 ~1600 ℃

Thermal Conductivity: 23-25 W.(M.K)-1

Bending Strength: ≥ 900 Mpa

Fracture Toughness: 6~8 (Mpa.m1/2)

Thermal Expansion Coefficient (at 0~1400℃): 2.95~3 ×10-6/℃

Because silicon nitride welding pins are electrically insulated, unnecessary current can be completely avoided, sparks are avoided between ceramic pin and the workpiece, and the slag removal work during the welding process is reduced; the high wear resistance and high fracture toughness of silicon nitride ceramic enables the workpiece to be accurately positioned for a long time. The welded workpiece maintains a very high quality and high yield, reducing the frequency of locating pin replacement and improving production efficiency.

3 . Manufacturing technique:
Uni-axial pressing
Iso-static pressing
Extrusion
Slip casting

4 . Material Data Sheet