CN100348878C - Bulk amorphous alloy rotary bearing and production thereof - Google Patents

Abstract

The present invention discloses a large amorphous alloy rolling bearing and the manufacturing processes thereof, which is characterized in that the manufacturing material of a rolling element (4), an outer ring (1) and an inner ring (2) are a Zr based large amorphous alloy. The rolling element (4) has the manufacturing processes that an electric arc furnace is used for smelting the Zr based large amorphous alloy for ingot casting, and then a cast rod is prepared on a vacuum suction casting device; the obtained cast rod is mechanically processed by turning, cutting, etc. The outer ring (1) and the inner ring (2) have the manufacturing processes that the electric arc furnace is used for smelting the Zr based large amorphous alloy for ingot casting, and then a circular body is prepared on the vacuum suction casting device, and is mechanically processed by turning, coarse grinding, etc. so as to be finally assembled and tested. The present invention can reduce the phenomena of the point corrosion, the stripping and the failure of the surface of the bearing rolling element (4), the outer ring (1) and the inner ring (2) so as to prolong the service life of the bearing.

Description

The manufacturing process of bulk amorphous alloy rotary bearing

Technical field

The present invention relates to a kind of bearings with rolling contact, particularly relate to a kind of various rolling bearings that adopt bulk amorphous alloys to make.

Background technique

At present, its preparation material of a large amount of bearings that use adopts Bearing Steel more in industrial production and the daily life.The bearing that adopts this made is after using after a while, point corrosion takes place easily on the rolling element surface, peeling off appears in the surface hardness layer thereupon, and the spalling phenomenon with the growth rigidity layer of service time is more and more serious, until rolling element total failure and cause whole bearing failure." Metallic Functional Materials .vol.9.No.32 " delivered the review article of one piece of relevant bulk amorphous alloys of Wu Zhifang, the author points out " Inoue is used to prepare high-accuracy gear and bearing with the Zr base large amorphous alloy " in this article, but, do not disclose the manufacturing process of relevant Zr base large amorphous alloy bearing.

Summary of the invention:

In order to overcome that spot corrosion that plain bearing steel bearing is prone to was lost efficacy and with the difficulty of Zr base large amorphous alloy manufacturing bearing, the invention provides a kind of technology of making rolling bearing with bulk amorphous alloys, failure phenomenon such as this bulk amorphous alloy rotary bearing overcome the rolling element spot corrosion, peel off, thereby the working life of having improved bearing.

The technical solution adopted for the present invention to solve the technical problems is: the manufactured materials of rolling element, outer race and bearing inner ring is the Zr base large amorphous alloy; The manufacturing process of rolling element is at first to use arc melting bulk amorphous alloys ingot casting, then preparation casting rod on the suction pouring device.Zr base large amorphous alloy casting rod with being obtained becomes pole through lathe cutting earlier, cuts into short cylindrical again, obtains cylindrical body through corase grind, correct grinding, flat stone mill corase grind cylindrical body end face, flat stone mill correct grinding cylindrical body end face; The manufacturing process of outer race, interior ring is with arc melting Zr base large amorphous alloy ingot casting, prepares ring bodies then on the suction pouring device.With the Zr base large amorphous alloy inner and outer rings that is obtained, corase grind inner and outer rings both ends of the surface, corase grind inner and outer rings outer surface, corase grind inner and outer rings internal orifice, corase grind outer shroud internal orifice raceway, correct grinding inner and outer rings both ends of the surface, correct grinding inner and outer rings outer surface, correct grinding inner and outer rings internal orifice, correct grinding outer shroud internal orifice raceway; Assemble at last, check.

The invention has the beneficial effects as follows spot corrosion, the spalling failure phenomenon that can farthest reduce bearing element surface, interior ring and outer shroud, prolonged the working life of bearing.The bearing of selecting for use the Zr base large amorphous alloy to make is because of himself having higher hardness, and Rockwell hardness is RHC 〉=60, and the hardness number of material surface and inside is consistent; And its compressive strength is 1800MPa, and fracture toughness is 60Gam ^1/2, this shows that non-crystalline very is fit to make rolling element, interior ring and the outer shroud of bearing.Inefficacy such as this bearing reduced spot corrosion between bearing element surface and bearing inner ring, the outer shroud, peel off has prolonged working life of bearing.In big load high speed rotating test, also proved above-mentioned conclusion, uniform surface abrasion only takes place in the rolling element cylinder, does not produce spot corrosion and peels off, at this moment, the inefficacy of rolling element only shows as diameter and produces faint reducing, but can not produce Destructive wear to the interior ring and the outer shroud of bearing.

Description of drawings

Fig. 1 is the structural drawing of bulk amorphous alloy rotary bearing;

Fig. 2 is the failure conditions of GCr15 Bearing Steel rolling element rotation bearing roller in the time of 3168 minutes;

Fig. 3 is Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The failure conditions of bearing roller when the rolling element that bulk amorphous alloys is made rotates 3168 minutes;

Fig. 4 is the wear morphology of the rolling element that observed GCr15 Bearing Steel is made under the ESEM;

Fig. 5 is Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The wear morphology of the bearing roller that bulk amorphous alloys is made.

In Fig. 1,1. outer shroud, 2. in ring, 3. retainer, 4. rolling element.

Embodiment

Accompanying drawing 1 is an embodiment disclosed by the invention, and the manufactured materials of rolling element 4, bearing inner ring 2 and outer race 1 is Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5Bulk amorphous alloys.The manufacturing process of rolling element 4 is at first to use arc melting bulk amorphous alloys ingot casting, then the casting rod of preparation  10 * 100～150mm on the suction pouring device.Then, become the pole of  8, cut into the short cylindrical of  8 * 8mm again, make bearing roller through grinding then, roughly grind into  7.5 through lathe cutting ^{+ 0.5}The cylinder of * 8mm obtains  7.5 through correct grinding again ^{+ 0.05}* 7.5 ^{+ 0.05}The cylindrical body of mm, flat stone mill end face corase grind, flat stone mill end face fine-grinding.

The manufacturing process of interior ring 2 is to use arc melting Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The bulk amorphous alloys ingot casting encircles blank in the preparation ring bodies then on the suction pouring device.Operation successively is: ring both ends of the surface in the corase grind, ring outer surface in the corase grind  38.5, ring internal orifice in the corase grind  30, ring both ends of the surface in the correct grinding, ring outer surface in the correct grinding  38.5, ring inner surface in the correct grinding  30.

The manufacturing process of outer shroud 1 is to use arc melting Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5Bulk amorphous alloys ingot casting, preparation ring bodies outer shroud blank on the suction pouring device then.Operation successively is: corase grind outer shroud both ends of the surface, corase grind  62 outer ring outer surfaces, corase grind  50 outer shroud internal orifices, corase grind  53.5 outer shroud internal orifice raceways, correct grinding outer shroud both ends of the surface, correct grinding  62 outer ring outer surfaces, correct grinding  50 outer shroud internal orifices, correct grinding  53.5 outer shroud internal orifice raceways.

Assemble at last, check.

Adopt Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The rolling element of the 2206 model bearings that bulk amorphous alloys is made has carried out the comparative trial of fatigue life with the GCr15 bearing roller.Test conditions is: equivalent dynamic load/dynamic load rating (P/C) is 0.236, and radial load (Fr) is 5063N, and test speed (n) is 6300r/min, and lubricated and freezing mixture is the N32 lubrication by oil circulation.

The rotation test result is: when rotating test for 3168min, obvious inefficacy has taken place in the rolling element of contrast bearing, and serious pitting has appearred in the rolling element surface peels off, and causes bearing total failure.And Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The bearing roller that bulk amorphous alloys is made is not observed tangible spot corrosion spalling failure under same test conditions.

Can see from 500 times scanning electron microscope images, after the rotation test of GCR15 Bearing Steel rolling element through 3168min, serious frictionally damage occur, be attended by abrasive dust in blocks and be extruded the (see figure 4) that comes off.Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The microscopic appearance of the rolling element wearing and tearing that bulk amorphous alloys is made shows, through after the rotation wear test of 3168min, there is not tangible abrasive dust fragment to come off, only can see more shallow slide mark on the rolling element surface, in the end of some slide mark some irregular sheet abrasive dust (see figure 5)s that do not come off as yet that distributing, through spectral test still being Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The composition of bulk amorphous alloys.From Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5The SEM on bulk amorphous alloys rolling element surface observes as can be known, Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5Bulk amorphous alloys has higher hardness, so its abrasion-resistance is very high.

Claims (1)

1, a kind of manufacturing process of bulk amorphous alloy rotary bearing, the manufactured materials of its outer shroud (1), interior ring (2) and rolling element (4) is the Zr base large amorphous alloy, it is characterized in that: the process step of outer shroud (1), interior ring (2) and rolling element (4) is:

(1), the manufacturing process of rolling element (4):

A. at first use arc melting Zr base large amorphous alloy ingot casting;

B. on the suction pouring device, prepare the casting rod then;

C. with the Zr base large amorphous alloy casting rod that is obtained, become pole through lathe cutting earlier;

D, cut into short cylindrical;

E, process corase grind, correct grinding obtain cylindrical body;

F, flat stone mill corase grind cylindrical body end face, flat stone mill correct grinding cylindrical body end face;

(2), the manufacturing process of outer shroud (1), interior ring (2):

A, be with arc melting Zr base large amorphous alloy ingot casting;

B, on the suction pouring device, prepare ring bodies then;

C, with the Zr base large amorphous alloy inner and outer rings ring bodies that is obtained, corase grind inner and outer rings both ends of the surface;

D, corase grind inner and outer rings outer surface;

E, corase grind inner and outer rings internal orifice;

F, corase grind outer shroud internal orifice raceway;

G, correct grinding inner and outer rings both ends of the surface;

H, correct grinding inner and outer rings outer surface;

I, correct grinding inner and outer rings internal orifice;

J, correct grinding outer shroud internal orifice raceway;

(3), assemble at last, check.

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