Silicon Nitride ceramic bearing step cone roller rods
Reputation depends on quality, quality comes from Hard!
Silicon Nitride Ceramic:
In order to prevent the accumulation of process lubricants or products and/or dirt, Silicon Nitride Ceramics must be mechanically cleaned of scratches and other rough surfaces, which are generally removed with a stainless steel polishing machine. If stainless steel is heated to a certain high temperature in the air during welding or grinding, chromium oxide thermal tempering color will appear on both sides of the weld, the lower surface and the bottom of the weld. The heat-tempered color is thinner than the oxide protective film and is clearly visible. The color is determined by the thickness, which can be iridescent, blue, purple to pale yellow and brown. Thicker oxides are generally black. It is caused by staying in high temperature or high temperature for a long time. When any of these oxide layers appear, the chromium content on the metal surface will decrease, causing the corrosion resistance of these areas to decrease. In this case, not only should the thermal tempering color and other oxide layers be eliminated, but also the chromium-poor metal layer under them should be cleaned. Rust on silicon nitride products or equipment is sometimes seen before or during the production process, which indicates that the surface is severely contaminated. Such as Silicon Nitride Ceramic Plate. Rust must be removed before the equipment is put into use, and the thoroughly cleaned surface shall be inspected by iron test and/or water test.
properties:
High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.
Data Sheet↓
Color: Black Grey
Density: ＞3.2g/cm3
Hardness: HRA90
Vickers Hardness (Hv50): ＞1550 HV0.5
Modulus of Elasticity: 290Gpa
Flexural Strength: ＞600Mpa
Compressive Strength: 2500Mpa
Modulus of Elasticity(25°C): 65Gpa
Fracture toughness:＞6.0 Mpam1/2
Maximum Use Temperature: 1200°C
Thermal Conductivity:15-20 W(m.K)
Thermal Expansion Coefficient: ＞3.1 10-6/°C
Thermal Shock Resistance: 500 △T°C
Special Heat Capacity: 700 KJ/kg.K
Dielectric Strength: 1 KV/mm
Dielectric Constant: er
Volume Resistivity(20°C): 1.0*10(12)Ω.cm
Application industry:
Machinery, electronic, semiconductor, chemical, petroleum, smelt.
Specific application:
Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.
Why Choose Us? 1.12 years of professional production industrial ceramics factory 2.High quality products with low price 3.High precision parts with lowest tolerance 4.Short time for production 5.Has a group of experienced, professional and efficient R&D team 6.Has a good reputation in China and abroad. 7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
Products Show
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
