Silicon Nitride si3n4 ceramic bearing roller wheel sleeve
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Silicon Nitride Ceramic:
Silicon Nitride Ceramics is an element that strongly stabilizes austenite and expands the austenite phase region. Silicon Nitride Ceramic Sleeve are made of silicon nitride ceramic materials and are often used as pipeline protection materials in high temperature, high pressure, and corrosive media environments. In order to obtain a single austenite structure, the minimum nickel content required when the steel contains 0.1% carbon and 18% chromium is about 8 %, this is the basic component of the most famous 18-8 chromium-nickel austenitic stainless steel. In austenitic stainless steel, with the increase of nickel content, the residual ferrite can be completely eliminated, and the tendency of σ phase formation is significantly reduced ; At the same time, the martensite conversion temperature is reduced, and the λ→M phase transition may not even occur, but the increase of nickel content will reduce the solubility of carbon in austenitic stainless steel, thereby increasing the tendency of carbide precipitation. The influence of silicon nitride on the mechanical properties of austenitic stainless steels, especially chromium-nickel austenitic stainless steels, is mainly determined by the influence of nickel on the stability of austenite. The range of nickel content in the steel that may undergo martensitic transformation Inside, as the nickel content increases, the strength of the steel decreases and the plasticity increases. The chromium-nickel austenitic stainless steel with stable austenitic structure has excellent toughness (including extremely low temperature toughness), so it can be used as low temperature steel, which is well known For the chromium-manganese austenitic stainless steel with stable austenitic structure, the addition of nickel can further improve its toughness.
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
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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