WO1995007417A1 - Piece mecanique comportant des elements de roulement - Google Patents
Piece mecanique comportant des elements de roulement Download PDFInfo
- Publication number
- WO1995007417A1 WO1995007417A1 PCT/JP1993/001278 JP9301278W WO9507417A1 WO 1995007417 A1 WO1995007417 A1 WO 1995007417A1 JP 9301278 W JP9301278 W JP 9301278W WO 9507417 A1 WO9507417 A1 WO 9507417A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- steel
- gas
- hardened
- rolling elements
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0005—Hubs with ball bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/32—Balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
- F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/185—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/64—Medium carbon steel, i.e. carbon content from 0.4 to 0,8 wt%
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/70—Ferrous alloys, e.g. steel alloys with chromium as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/02—Wheel hubs or castors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/303—Parts of ball or roller bearings of hybrid bearings, e.g. rolling bearings with steel races and ceramic rolling elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/10—Surface characteristics; Details related to material surfaces
Definitions
- the present invention relates to a mechanical component having rolling elements such as a constant velocity universal joint and a rolling bearing whose life is improved by a steel type of a constituent member and heat treatment.
- the outer ring of a steel constant velocity universal joint, the outer ring of a hub bearing as one of the rolling bearings (these outer rings are referred to as the outer member in the following general description), and the outer member of the ball screw are It has a complicated shape with a thick part and a thin part. If carburizing or integral quenching is applied, the shape will be distorted. Also, in the constant velocity universal joint, the threaded portion of the shaft of the outer member and the mounting hole of the flange of the outer member of the hub bearing need to be left unhardened because quenching impairs toughness.
- the induction hardening method which is convenient for quenching and hardening only the required surface layer, was used, and medium-carbon structural steel was used as the material, and the rolling and sliding surfaces were induction hardened and tempered. A hardened surface layer is formed.
- rolling elements ball rolling elements and roller rolling elements (hereinafter simply referred to as rolling elements) used in the above mechanical parts have simple shapes, they have good hardenability and excellent rolling life, especially high carbon chromium bearing steel. (1% C, 1.5% Cr steel, etc.), it is used as a one-piece quench.
- the above-mentioned induction hardened material contained Si and A1 in a total amount of 0.5 to 1.0% (% by weight, hereinafter the same) in addition to carbon steel for structural use, which is easy to forge.
- Structural steels of ⁇ 0.8% C have been developed and used (Japanese Patent Publication Nos. 1991, 340, 1112, 12.77.651) These steel grades are inexpensive materials and are easy to forge, so they are suitable for forming outer members with complicated shapes.Also, there is little deformation during heat treatment during local induction quenching, and the inner parts Has high toughness and has a long rolling fatigue life because the hardened layer after induction hardening and tempering has good heat resistance and abrasion resistance.
- the outer member and the inner member (hereinafter referred to as the inner member) See) has been awarded.
- a mechanical component that is an object of the present invention includes: an outer member having a tread surface or a sliding surface on an inner surface; an inner member having a rolling surface or a sliding surface on an outer surface; and the outer member and the inner member. Rolling elements interposed between the rolling surface or the sliding surface.
- the present invention provides the above-mentioned mechanical component, wherein the outer member has at least CO.50 to 0.70% and Si or A1 alone or a total amount of Si and A1 of 0.5 to 0.5%. 1.0%, and the rolling surface or the sliding surface has a hardened layer by induction hardening, and the rolling element is a quenched and tempered high carbon chromium bearing ⁇ . It is characterized in that it has a surface layer portion formed by carbonitriding on its outer peripheral surface.
- Such mechanical parts include constant velocity universal arms, hub bearings and ball screws.
- ball rolling elements there are rolling elements of cylindrical rollers or conical rollers.
- the outer member has a medium carbon level of 0.50 to 0.70% C. It is made of induction hardened steel and its rolling * Since the sliding surface is tempered after induction hardening, the unhardened inner part is almost soft with good impact resistance, Since the compressive stress caused by the deformation during induction hardening remains in the hardened surface layer of the moving surface, etc., the hardened layer has excellent abrasion resistance, and the cracks in the surface layer cause the surface to become starved. Slow, long rolling fatigue life.
- the C content of the induction hardening steel is less than 0.5%, the material becomes insufficient in induction hardenability, and if it exceeds 0.70%, the heat-workability deteriorates.
- the composition range of C is 0.50 to 0.70% C, but preferably 0.60 to 70% C. Since this induction hardening steel contains 0.5% to 1.0% of Si and / or A1, both A1 and Si increase the tempering softening resistance and are used under high surface pressure. Even when the rolling surface generates heat, the degree of softening of the hardened layer is small, and the hardened layer has heat resistance.
- the total amount of S i and A 1 is in the range of 0.5 to 1.0%. Normally, it is considered to be A ⁇ killed steel containing 70 to 0.90% of SiO 2 and about 1.03% of A 1.
- the other components Mn and Cr are each set to 1.5% or less. However, since Mn secures the toughness of the internal part and increases the hardening ability of the surface hardened layer by induction hardening, it is 1.0%. It is adjusted to ⁇ 1.2% Mn, and usually 0.3% Cr or less without adding Cr. On the other hand, the rolling element high carbon chromium bearing steel is 0.90 ⁇ 1.10% C , 0.15 to 0.70% Si, 1.0% or less Mn, 1.0 to: 1.6% Cr This is a mesh with a basic composition of carbonitriding and quenching.
- the martensitic transformation of the carbonitrided surface layer is delayed more than the inside during the quenching process after austenitization, so residual compressive stress is applied to the surface layer after transformation. Occurs, the amount of residual austenite increases, and fine carbonitrides are dispersed and precipitated in the matrix of the surface layer to increase the hardness, thereby improving the abrasion resistance and fatigue strength.
- Rolling elements that have been carbonitrided and quenched delay rolling of the rolling element surface due to the ingress of wear powder generated due to wear of the rolling surface of the outer member or the inner member, resulting in a longer life.
- the life of the bearing as a whole or the universal joint as a whole is prolonged, and the reliability associated with the long life is improved.
- high carbon chromium bearing ⁇ JIS SU J2 steel (see Table 4, equivalent to DIN 100 Cr 6 ⁇ and SAE 52100 steel) is preferably used.
- the carbonitriding of high carbon chrome shaft ⁇ if the gas carbonitriding method, generally, 0 to about 20% endothermic gas (Ji, H 2 35%, endothermic gas N 2 to about 40% of the composition : RX gas) to increase the carbon potential by adding a hydrocarbon gas such as methane, and heat and maintain the rolling elements in an atmosphere containing ammonia as a nitriding agent.
- NX gas a nitrogen-based heating type gas (CO than about 2%, H 2 of about 2%, non-oxidizing originating mature type gas composition of the balance mostly N 2; hereinafter referred to as NX gas) or nitrogen Gas is also used.
- the surface layer of this rolling element is formed by carbonitriding in nitrogen gas or a mixed gas of NX gas, hydrocarbon gas and ammonia gas
- the amount of nitriding is large and the hardening by quenching is large.
- the properties and fatigue strength are improved.
- the atmosphere in which the nitric acid ammonia gas is mixed with the conventional RX gas contains a large amount of hydrogen gas. In this case, since hydrogen gas in the atmosphere can be reduced, there is an advantage that noise of hydrogen embrittlement in the process of using the rolling element is reduced.
- a low-carbon chrome structure pot (0.13 to 0.48% C, 0.90 to 1.20%) is used.
- % C r Carburized product of, for example, JIS SC r415 steel in Table 4
- medium carbon structural rope (0.47 to 0.61% C: For example, the same S in Table 4) 53 C steel) and the above-mentioned hardened one of the high-carbon chromium bearing steel (for example, SUJ2 ⁇ in Table 4).
- the mechanical component including the rolling bearing and the constant velocity hand of the present invention has a complicated shape because the outer member is formed of a medium carbon quenching rope and has high formability. it can.
- the inner surface including the rolling surface and the sliding surface of the outer member is made of the induction hardened hardened layer of the medium carbon steel
- the rolling element is slightly more abrasion resistant to rolling and sliding than the rolling element. Inferior, but excellent in starvation resistance.
- the rolling elements are made of high carbon chromium steel and have a hardened surface layer by carbonitriding and quenching on the outer peripheral surface, so they have better abrasion resistance and rolling fatigue than solid hardened bodies. Therefore, the fatigue life of the joint or the bearing as a whole is prolonged.
- the outer member Even if the outer member has a complicated shape, it can be easily processed and heat-treated by high-frequency heating.Since the rolling element with a simple shape is suitable for carbonitriding, select an appropriate material for the inner member. This makes it easy to reduce the weight of bearings or joints, and is suitable for mass production without incurring high molding and heat treatment costs. (I) brief description of the drawings;
- FIG. 1 is a longitudinal sectional view of a hub bearing (A) and a fixed type ball joint (B) used for an automobile which is an object of the present invention.
- Fig. 2 shows the Weitzkers hardness distribution of the surface layer in the cross section of the steel ball after tempering after carbonitriding and quenching.
- Fig. 3 is a microscopic photograph (A, B) of a metal glow in a section near the surface of a pot ball that has been carbonitrided and quenched and then tempered (magnification: 400, sacrificial solution: picric acid alcohol solution) It is.
- Fig. 4 shows the Vickers hardness distribution of the surface layer in the cross section of a steel ball which has been carbonitrided, quenched and quenched at a low temperature and further subjected to a high temperature quenching of 50 (TC) h. ⁇
- FIG. 1 (A) shows, by way of example, a longitudinal sectional view of a hub bearing used for supporting a vehicle of a conventionally known automobile, the structure of which is known in the art.
- a flange 5 is integrally formed on an outer side of the vehicle, and the flange 5 is provided with a bolt hole 51 through which a fixing bolt (not shown) for fixing a vehicle is inserted.
- rolling balls 60 having rolling surfaces 6 on which two sets of balls 8 as rolling elements roll are rolled around the front and rear two rows.
- the inner ring 2 which is an inner member, includes a pair of front and rear inner holes 2a and 2b each having a rolling surface ⁇ ⁇ on which the ball 8 rolls in the vicinity of the enlarged diameter portion 21 at one end.
- the rolling surface 1 is in sliding contact with the ball 8 and is rotatably held in the outer bellows ⁇ ⁇ in the hollow portion of the outer race 7 with the end surfaces abutting on each other.
- the outer race 7 is made of a 0.50 to 0.70% C medium-carbon steel to which A1 and / or Si are added, and hot A hardened layer 61 formed by induction hardening and subsequent tempering is formed only on the rolling surface 6 of the groove 60 and the peripheral portion thereof by forging.
- the inner chamber 2 has a relatively cylindrical shape, and is formed of JIS SUJ2 steel, which is a high-carbon chromium bearing steel, and has been tempered after integral quenching.
- FIG. 1 (B) shows an embodiment of a fixed type ball joint as a kind of constant velocity adjustable hand which is another object of the present invention, and an outer member 7 as an outer member is an inner peripheral surface of a mouse portion 7a.
- a rolling groove 60 of a teaching line having a rolling surface 6 is engraved along the axial direction, and a stem 7 b of a shaft integrally protruding from an end of a mouth 7 a is serrated on an outer periphery.
- Gaien 7 is integrally formed by hot forging with 0.5 to 70% C rope to which A1 and / or Si is added, and the inner peripheral surface of the mouth 7a is rolling.
- the hardened layer 61 including the surface 6 is formed by induction hardening and subsequent tempering.
- an inner ring 2 as an inner member is held on its outer periphery via a ball 8 of a rolling element that fits in a rolling groove 10, but this inner ring 2 is carburized and quenched. It is formed from the subsequently tempered SCr415 steel, and at least the rolling surface ⁇ in the rolling groove is hardened.
- the ball 8 is made of SUJ2 steel that has been subjected to gas carbonitriding and post-quenching and tempering.
- a ball screw which is another object of the present invention is a mechanical component in which a screw shaft as an inner member and a nut as an outer member operate via a ball rolling element.
- the nut is formed from 0.50 to 0.70% C steel to which A1 and / or Si is added by hot forging, and the ball rolling surface is induction hardened.
- SUJ 2 steel after carbonitriding and post-quenching and tempering Is used.
- an integral hardened product of SU J2 steel or a carburized and hardened product of structural low chrome steel can be used.
- Si-containing medium carbon composition 0.65% C, 0.80% Si, 1.10% n.0.015% P, 0.010% S, 0.030% AK 0.20% Cr; hereinafter referred to as NK J 65 class
- NK J 65 class Si-containing medium carbon
- the outer peripheral surface was subjected to induction hardening and tempering at 170 ° C for 2 hours to complete a cylindrical specimen with a diameter of 12 mni and a length of 22 mm.
- JIS S53C steel, a medium carbon steel for structural use, and carbon chromium bearing steel SUJ2 steel were selected and machined into a cylindrical shape. perform tempering of 70 ° CX 2 h, also by the tempering of 1 80 e CX 2 h after the integral hardening quenching after oil austenite of 850 ° CX 0. 5 h to SUJ 2 ⁇ , similar Into cylindrical specimens.
- JIS bearing number 620 6 (outer bellows outer diameter 62 mm, inner ring inner diameter 30 mm), using quenched and tempered steel and high-carbon chromium bearing steel SUJ 2 steel ball carburized and quenched as rolling elements ) was formed and a rolling life test was performed.
- the carbonitriding of the balls was carried out by a bright quenching furnace in an atmosphere in which 1 part of propane gas and 10 parts of ammonia gas were added to 100 parts of RX gas for bright quenching and 100 parts of ammonia gas by volume ratio. After heating for h, it was quenched in oil. Tempering was performed at 17 (TCX for 2 h).
- the life test conditions were as follows: test bearing 6206, bearing load 700 kg kg, number of revolutions 200 rpm, lubrication was circulating lubrication of turbine 56 oil.
- Table 2 shows that the frequency of surface sculptures on the ball itself in bearings damaged by the life test is higher than that of the conventional combination of the medium carbon steel outer wheel and the high carbon chrome steel integrally hardened ball.
- the combination with the carbonitrided and quenched ball of high carbon chromium steel is smaller than that of the case where the outer peripheral ball is also quenched together, and the life is extended. It turns out that there is.
- the outer casing is made of a medium-carbon steel induction hardened product and the ball of the sintering body is made of a high carbon chromium steel SUJ2 by carbonitriding and quenching, is described below.
- the rolling elements are spheres with a diameter of 16.669 mm.
- a bright quenching furnace is used to select RX gas and NX gas as carrier gases.
- 17 TC X 2 h Tempered.
- Fig. 2 shows a hardness distribution curve measured by a micro Vickers hardness tester from the surface to the internal part in the cross section of a steel ball that has been subjected to carbonitriding and quenching and then tempering.
- the surface layer hardens slightly from the inner part, but the treatment in an atmosphere based on NX gas (curve a in the figure) is better than that in RX gas (curve b in the figure).
- the hardness of the part is high, and it increases by about 1 to 2 HRC in Rockwell C hardness.
- Fig. 3 is a micrograph of the vicinity of the cross-sectional surface of the steel ball in the heat treatment. Fine carbides are observed in the surface layer of carbonitrided carbon steel in an atmosphere based on NX gas (Fig. A)). This fine carbide is considered to contribute to the improvement of the wear resistance.
- Figure 4 after the low-temperature tempering, such as shown in FIG. 2 shows a further 5 0 0 e C 1 hardness distribution of the high-temperature tempering line ivy steel ball h. Due to this high-temperature tempering, the inner part softens to Hv500 or less, but the surface layer still has a hardness of ⁇ 600 or more.
- the hardness of the hardened layer (curve a in the figure) on the surface of the steel ball carbonitrided on the basis of NX gas shows the hardness of the steel ball carbonitrided on the basis of the RX gas (curve a).
- the hardness difference is considered to be due to the difference in the amount of nitrogen in the surface layer.
- the outer wheel is made of S53C steel and the above-mentioned NKJ65 steel forged product on the inner peripheral surface of the mouse part. It has been heat-quenched.
- the inner ring is a carburized and quenched product of SC r4 15 steel, as before.
- the balls as the rolling elements were obtained by carbonitriding and quenching of SU J2 steel, and the atmosphere gas in the furnace during carbonitriding was RX gas as the carrier gas, as shown in the above-mentioned embodiment. And NX gas are used. Both are formed by mixing propane gas and ammonia gas, and the heat treatment conditions are the same as in the above embodiment.
- the comparative example is a ball joint using a ball of a conventional one-piece hardened product of SU J2 steel.
- the life test of the fixed ball joint was performed under the conditions of an operating angle of 6 °, a load torque of 21 kgf-m, and a rotation speed of 170 rpm.
- Table 3 shows the test results.In the same manner, when the induction hardened product was used for the outer case, the carbonitrided and quenched ball was more effective in improving the life of the joint than the conventional integrally quenched ball. is there. It can also be seen that the carbonitriding product based on NX gas has a longer rolling life than that based on RX gas in a carbonitriding and quenching atmosphere.
- the load conditions are: load torque 21 kg km, rotation speed 1700 rpm, working angle 6 °
- Example of the present invention In this embodiment, a mixed gas based on NX gas is shown as the carbonitriding gas, but a gas obtained by mixing a hydrocarbon gas and an ammonia gas with a nitrogen gas may be used instead.
- the machine component having the rolling element according to the present invention is a machine component having a complicated shape on the outer member, in particular, as a constant velocity universal joint of a rotary power transmission system, and a hub bearing that rotatably supports a wheel on an axle. Further, it is suitable for use as a ball screw for a control machine in the fields of the automobile industry and other machine industries.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1993/001278 WO1995007417A1 (fr) | 1993-09-08 | 1993-09-08 | Piece mecanique comportant des elements de roulement |
KR1019950703457A KR100211423B1 (ko) | 1993-09-08 | 1993-09-08 | 전동체를 구비한 기계부품 |
EP93919632A EP0718513B1 (en) | 1993-09-08 | 1993-09-08 | Mechanical part having rolling elements |
DE69323909T DE69323909T2 (de) | 1993-09-08 | 1993-09-08 | Mechanisches teil mit rollelementen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1993/001278 WO1995007417A1 (fr) | 1993-09-08 | 1993-09-08 | Piece mecanique comportant des elements de roulement |
Publications (1)
Publication Number | Publication Date |
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WO1995007417A1 true WO1995007417A1 (fr) | 1995-03-16 |
Family
ID=14070508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/001278 WO1995007417A1 (fr) | 1993-09-08 | 1993-09-08 | Piece mecanique comportant des elements de roulement |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0718513B1 (ja) |
KR (1) | KR100211423B1 (ja) |
DE (1) | DE69323909T2 (ja) |
WO (1) | WO1995007417A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2739156A1 (fr) * | 1995-09-23 | 1997-03-28 | Gkn Automotive Ag | Joint homocinetique a billes |
JPH11129703A (ja) * | 1997-08-28 | 1999-05-18 | Nippon Seiko Kk | 車輪支持用転がり軸受ユニット |
EP3981608A1 (en) * | 2020-10-09 | 2022-04-13 | Volvo Truck Corporation | A wheel end assembly for a vehicle |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09329147A (ja) * | 1996-04-10 | 1997-12-22 | Nippon Seiko Kk | 耐水性長寿命転がり軸受 |
DE69831515T2 (de) * | 1997-01-17 | 2006-06-14 | Nsk Ltd | Lagereinheit für eine Fahrzeugradaufhängung |
SE9701592L (sv) | 1997-04-29 | 1998-10-05 | Ovako Steel Ab | Mikrolegerat stål för rullningslager samt navlagerenhet tillverkad av stålet |
US6287009B1 (en) * | 1998-03-06 | 2001-09-11 | Nsk Ltd. | Rolling bearing unit with rotation speed detection instrument for use in cars and method for working outer race for use in this bearing unit |
DE19928775C2 (de) * | 1998-06-29 | 2001-10-31 | Nsk Ltd | Induktionsgehärtete Wälzlagervorrichtung |
KR20000035349A (ko) * | 1998-11-11 | 2000-06-26 | 이토오 도요아키 | 자동차의 휠베어링 조립체 및 이를 제조하는 방법 |
SE9803957L (sv) | 1998-11-18 | 2000-05-19 | Skf Nova Ab | Rullningslager med belagda komponenter |
JP2000328194A (ja) * | 1999-03-12 | 2000-11-28 | Minebea Co Ltd | 転がり軸受及びその製造方法 |
US6478682B1 (en) | 1999-11-05 | 2002-11-12 | Ntn Corporation | Constant velocity universal joint |
EP1129868B1 (en) * | 2000-03-03 | 2007-10-24 | JTEKT Corporation | Bearing device |
JP2004360830A (ja) * | 2003-06-05 | 2004-12-24 | Ntn Corp | 等速自在継手およびその製造方法 |
DE112004001207B4 (de) * | 2004-10-01 | 2013-07-25 | Gkn Driveline International Gmbh | Verfahren zur Herstellung eines Gelenks mit hochbelastbarem Innenteil |
WO2009064729A2 (en) * | 2007-11-12 | 2009-05-22 | The Timken Company | A composite outer race for a wheel end and method of manufacturing thereof |
JP5679543B2 (ja) * | 2010-03-29 | 2015-03-04 | Ntn株式会社 | 軸受部品および軸受 |
DE102012212426B3 (de) * | 2012-07-16 | 2013-08-29 | Schaeffler Technologies AG & Co. KG | Wälzlagerelement, insbesondere Wälzlagerring |
KR102053485B1 (ko) * | 2012-10-17 | 2019-12-06 | 에누티에누 가부시기가이샤 | 베어링 부품, 구름베어링 및 베어링 부품의 제조 방법 |
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JPS57178902A (en) * | 1981-04-28 | 1982-11-04 | Loehr & Bromkamp Gmbh | Bearing device for wheel boss driven through synchronous rotary joint |
JPH02125841A (ja) * | 1988-07-11 | 1990-05-14 | Nippon Seiko Kk | 転がり軸受 |
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JPH04194415A (ja) * | 1990-11-28 | 1992-07-14 | Nippon Seiko Kk | 転がり軸受 |
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JP2541160B2 (ja) * | 1991-07-18 | 1996-10-09 | 日本精工株式会社 | 転がり軸受 |
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- 1993-09-08 WO PCT/JP1993/001278 patent/WO1995007417A1/ja active IP Right Grant
- 1993-09-08 DE DE69323909T patent/DE69323909T2/de not_active Expired - Lifetime
- 1993-09-08 EP EP93919632A patent/EP0718513B1/en not_active Expired - Lifetime
- 1993-09-08 KR KR1019950703457A patent/KR100211423B1/ko not_active IP Right Cessation
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JPS5022726A (ja) * | 1973-07-02 | 1975-03-11 | ||
JPS57178902A (en) * | 1981-04-28 | 1982-11-04 | Loehr & Bromkamp Gmbh | Bearing device for wheel boss driven through synchronous rotary joint |
JPH02125841A (ja) * | 1988-07-11 | 1990-05-14 | Nippon Seiko Kk | 転がり軸受 |
JPH03199340A (ja) * | 1989-12-27 | 1991-08-30 | Ntn Corp | 高周波焼入部品 |
JPH04194415A (ja) * | 1990-11-28 | 1992-07-14 | Nippon Seiko Kk | 転がり軸受 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2739156A1 (fr) * | 1995-09-23 | 1997-03-28 | Gkn Automotive Ag | Joint homocinetique a billes |
JPH11129703A (ja) * | 1997-08-28 | 1999-05-18 | Nippon Seiko Kk | 車輪支持用転がり軸受ユニット |
EP3981608A1 (en) * | 2020-10-09 | 2022-04-13 | Volvo Truck Corporation | A wheel end assembly for a vehicle |
US12090782B2 (en) | 2020-10-09 | 2024-09-17 | Volvo Truck Corporation | Wheel end assembly for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE69323909T2 (de) | 1999-09-16 |
DE69323909D1 (de) | 1999-04-15 |
EP0718513B1 (en) | 1999-03-10 |
EP0718513A4 (en) | 1997-04-09 |
EP0718513A1 (en) | 1996-06-26 |
KR100211423B1 (ko) | 1999-08-02 |
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