Customized Corrosion Resistant High Precision Silicon Nitride Welded Locating Pins

Overview of Silicon Nitride Welded Locating Pins

Silicon Nitride Welded Locating Pins are precision parts used for weld locating. It is made of a silicon nitride material with high strength, high hardness, high-temperature resistance, corrosion resistance and other excellent performance. During the welding process, silicon nitride welding pins can accurately locate the weldment to ensure the precision of the welding position and improve the welding quality. At the same time, it’s good abrasion resistance and stability can ensure that the accurate positioning function can still be maintained after many times of use, which is widely used in automotive, electronics and other industries that require high welding accuracy.

Features of Silicon Nitride Welded Locating Pins

Silicon Nitride Welded Locating Pins have the following significant features:

High-precision positioning: Silicon Nitride Welded Locating Pins have high dimensional accuracy, which can accurately locate the welded parts and ensure the accuracy of the welded position, and the positioning error can be controlled within a very small range, which meets the requirements of the high-precision welding process and helps to improve the quality of the weld and the consistency of the product.

High-temperature resistance: silicon nitride has good high-temperature resistance; in the high-temperature welding environment, positioning pins can maintain stable performance and size, will not be deformed or softened due to high temperature, thus ensuring the accuracy and reliability of positioning, can withstand hundreds of degrees of high temperature without affecting its use.

High hardness and abrasion resistance: silicon nitride welded locating pins have extremely high hardness and strong abrasion resistance, which can resist abrasion and friction during frequent use and do not easy to appear scratches or deformation, which prolongs the service life of the locating pins, reduces the frequency of replacement, and lowers the production cost.

Good chemical stability: Silicon Nitride has excellent chemical stability. It is not easy to react with various chemical substances used in the welding process, and it is not easy to be corroded, so it can maintain stable performance in different working environments, ensuring the long-term reliable use of positioning pins.

The specifications table of Silicon Nitride Welded Locating Pins.

Property	Specification
Color	Grey
Density	3.21 g/cm³
Compressive strength	3000 MPa
Young’s modulus E	320 GPa
Maximum temperature (inert gas)	1200 °C
Maximum temperature (air)	1100 °C
Thermal conductivity @ 1000 °C	16 W/mK
Thermal expansion (20 – 1000 °C)	3.5×10⁻⁶ /K
Resistivity at 20 °C	10¹² Ω·cm
Resistivity at 800 °C	10⁷ Ω·cm
Dielectric constant	6

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Applications of Silicon Nitride Welded Locating Pins

Automobile manufacturing: In the welding of automobile engine blocks, transmission housing and other components, silicon nitride welded locating pins can ensure the accurate splicing of various parts to ensure welding precision, thus improving the stability and reliability of the engine and transmission performance and reducing leakage, vibration and other problems caused by welding errors.

Electronic equipment manufacturing: For the welding of the shell and internal structure of cell phones, computers and other electronic equipment, silicon nitride welding locating pins can achieve high-precision positioning to ensure that the position of the welding point is accurate, which helps to improve the overall quality of the electronic equipment and the appearance of the flatness of the electronic equipment to meet the miniaturization of the electronic equipment, high-precision production requirements.

Aerospace field: In the welding of aircraft wings and fuselage structural parts, silicon nitride welding locating pins plays a key role. It can maintain stable positioning performance under high temperatures, high pressure and other complex environments, ensure welding quality, ensure the strength and reliability of aerospace parts, and meet the strict requirements of the aerospace industry on product quality and safety.

Mechanical manufacturing: In the welding processing of various mechanical parts, such as gearboxes, machine tool beds, etc., silicon nitride welding locating pins can improve welding precision, reduce welding deformation, and ensure the assembly precision and motion precision of mechanical parts, thus enhancing the performance and service life of the whole mechanical equipment.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of Silicon Nitride Welded Locating Pins

Q1: What are the specific advantages of silicon nitride locating pins in bump/spot welding?

Spark-free welding: Insulation prevents current from passing through the locating pin, preventing burnout of the nut threads and reducing subsequent through-hole machining. High life: HRA93 hardness, wear-resistant, 72 times longer life than stainless steel pins, reducing replacement frequency. High precision: dimensional tolerance ±0.005mm, positioning error <0.01mm, improve welding consistency.

Q2: What is the operating temperature range of silicon nitride locating pins?

Short-term temperature resistance 1400℃, long-term stable working temperature ≤1200℃. When exceeding 1200℃, dense silicon oxide film (SiO₂) will be formed on the surface to enhance the oxidation resistance further.

Q3: How to maintain the silicon nitride locating pin?

Cleaning: Wipe with alcohol or neutral solvent to avoid residual metal debris. Inspection: Regularly observe the surface wear with a microscope; wear amount > 0.02mm needs to be replaced. Storage: Avoid humid environments and prevent contact with corrosive gases such as hydrofluoric acid. Installation: Use impact-free assembly to prevent brittle fracture (silicon nitride fracture toughness 3-5MPa・m¹/²).

Q4: Are silicon nitride locating pins fragile? How to avoid damage?

Silicon nitride is a brittle material and requires attention:

Avoid shock: Use special fixtures when installing, and prohibit knocking. Thermal shock: A sudden change of temperature (e.g.,>500℃) may lead to cracking; it is recommended to preheat to 100-200℃ before use. Optimized design: use rounded transition, reduce stress concentration, special scenarios can choose fiber-reinforced silicon nitride (toughness increased by 30%).

Q5: Why are Silicon Nitride locating pins more expensive?

Material cost: silicon nitride powder requires high purity (>99.5%), and the preparation process is complicated (such as the carbothermal reduction method). Processing difficulty: laser, diamond grinding and other special processing, processing efficiency is low (the cost is 10-50 times that of metal). Comprehensive value: although the unit price is high, but a long life and saving process. The comprehensive cost is only 1/70 of stainless steel.