CN1614247A

CN1614247A - Bulk amorphous alloy rotary bearing and production thereof

Info

Publication number: CN1614247A
Application number: CN 200410092876
Authority: CN
Inventors: 马明臻; 刘日平; 王文魁
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2004-11-16
Filing date: 2004-11-16
Publication date: 2005-05-11
Anticipated expiration: 2024-11-16
Also published as: CN100348878C

Abstract

A rolling bearing features that its rollers, interal ring and external ring are made up of big-block Zr-base non-crystal alloy through smelting the big-block Zr-base non-crystal alloy in electric arc furnace, respective vacuum casting to obtain rod and ring, respectively turning and grinding to obtain rollers, and internal and external rings, and assembling.

Description

Bulk amorphous alloy rotary bearing and manufacturing process thereof

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.

Summary of the invention:

Be prone to the deficiency that spot corrosion was lost efficacy in order to overcome bearing that the plain bearing steel makes in using, the present invention adopts this new material of bulk amorphous alloys to make bearings with rolling contact, failure phenomenon such as this 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.

Beneficial effect of the present invention: 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 60GPam ^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, a kind of bulk amorphous alloy rotary bearing is made up of outer shroud (1), interior ring (2), retainer (3) and rolling element (4), it is characterized in that: the manufactured materials of outer shroud (1), interior ring (2) and rolling element (4) is the Zr base large amorphous alloy.

2, bulk amorphous alloy rotary bearing according to claim 1 is characterized in that: the manufactured materials of outer shroud (1), interior ring (2) and rolling element (4) is Zr ₄₁Ti ₁₄Cu ₁₂Ni ₁₀Be _22.5Bulk amorphous alloys.

3, a kind of technology of making the described bulk amorphous alloy rotary bearing of claim 1 is characterized in that:

The manufacturing process of A, rolling element (4):

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

B, preparation casting rod on the suction pouring device then;

C, the Zr base large amorphous alloy casting that is obtained is excellent becomes 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.

The manufacturing process of B, 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.

C, assemble at last, check.