The advantages and characteristics of the quenched and tempered steel of KOYO bearing

A: KOYO bearing advantages: 1, resistance to abrasion - , because of the ceramic materials as inert material more resistant to corrosion and wear; 2, long life and wear - resistance - Full ceramic KOYO bearing fatigue life could be 10 to 50 times longer than KOYO bearings, KOYO hybrid ceramic bearing, the life also 3 - higher than KOYO bearing's life About five times; 3, high speed and acceleration - - Under the condition of dn value of more than 3 million operation, and skid, can reduce wear and fever; 4, high temperature resistant - - All ceramic KOYO bearing in 500. C above temperature working; 5, large rigid - - From ceramic materials of high elastic modulus, the rigid steel KOYO bearing 15 - larger than normal 20%; 6, the lubrication rarely - - Ceramic material of low friction coefficient, using the ceramic KOYO bearing lubrication, the lubricant is thinning or boundary conditions, its lubricating ability is not less than the traditional steel KOYO bearings commonly used lubricants; 7, low torque - - According to the structure of ceramic KOYO bearing torque about a third of decrease; 2: the properties of the quenched and tempered steel: 1. Of this kind of steel hardenability of steel: oil quenching directly in 40 ~ 60 n, m, commonly used types of steel with chrome molybdenum steel, chromium manganese steel, etc. Common grades of 35 ( jrMn 42 crmo 35 l: rMnV 40 crmn 35 crmnsi 30 crmnsi, 35 ( : rMnTi, 40 crmnti, 40 crni, chrome molybdenum steel with high hardenability, high temperature and high strength, good stability and organization, eliminate the temper brittleness, 42 crmo used to produce high strength requirement, large cross section of the conditioning parts, such as gear, large steam turbine generator shaft, the load of the connecting rod, etc. , at the same time also can be made in five ( :) O ℃ below the long-term work of the parts; Chromium manganese steel hardenability and high strength, toughness does not decrease 30 ( : rMnsi for high strength steel, has good weldability, compressed sheet used in the manufacture of high pressure blower, high-speed spindle load and other important parts. 2. Number of common materials have 30 mn2mow, 30, 40 crmnmo, :37 crni3 rNi3 40 crnimc) 40 crmnmo, 45 crnimov, 25 cr2ni4w, etc. , is a common high hardenability steel, has the characteristics of small temper brittleness, overheating tendency, used to make large cross-sectional area, high strength and high toughness of parts, such as large heavy automobile axle shaft, etc. 3. Low hardenability steel: commonly used in the manufacture of cross-section small and unimportant parts; Chrome steel has good hardenability, has higher than carbon steel tempering stability, wide quenching temperature, not easy to overheating, small deformation and cracking tendency, so the application is very wide; The effect of manganese steel is similar to chrome steel, manganese reduce the critical cooling rate of the steel greatly, improve the strength and hardness of the steel; Boron in boron steel significantly improves the hardenability of steel, its performance is close to 40 cr, oil quenching critical in 20 to 30 mm in diameter, commonly used for automobile axle shaft, worm, spline shaft, etc.