CN106591697A

CN106591697A - Bearing alloy steel and heat treatment method thereof

Info

Publication number: CN106591697A
Application number: CN201610985453.3A
Authority: CN
Inventors: 郑小平
Original assignee: ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd
Current assignee: ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd
Priority date: 2016-11-09
Filing date: 2016-11-09
Publication date: 2017-04-26

Abstract

The invention provides a bearing alloy steel. The bearing alloy steel comprises, by weight, 0.5-0.8% of C, 0.02-0.05% of Si, 0.02-0.1% of Nb, 0.05-0.2% of Mn, 0.01-0.05% of Mo, 0.005% or less of S, 0.001% or less of O, 0.0015% or less of P, 0.15-0.35% of Al, 0.1-1.5% of Cr, 0.002% or less of other impurities which cannot be separated, and the balance of Fe. The bearing alloy steel has the advantages of overcoming of the disadvantages in the prior art, reasonably designed material formula, improved strength, toughness and stability, cost reduction, and prolongation of the service life of bearing parts.

Description

A kind of bearing metal steel and heat treatment method

Technical field

Originally it is related to bearing material technical field, and in particular to a kind of bearing metal steel.

Background technology

Bearing is that part that is fixed and reducing load coefficient of friction is played in mechanical transmission course.It may also be said that working as other When parts produce relative motion each other on axle, for reducing power transmission process in coefficient of friction and holding shaft center Fixed parts.Bearing is a kind of very important parts in contemporary plant equipment.Its major function is supporting machinery rotation Swivel, to reduce mechanical load coefficient of friction of the equipment in transmission process.

Therefore need bearing steel that there is preferable hardness, intensity, toughness and stability, but when hardness, strength enhancing When often lead to bearing fragility raising, cause bearing easily to be damaged, thus existing bearing part material need be improved.

Present invention

(1) technical problem for solving

For the deficiencies in the prior art, this provides a kind of bearing metal steel, overcomes the deficiencies in the prior art, and material is matched somebody with somebody Side is reasonable in design, the intensity of steel alloy, toughness and stability, reduces cost, improves bearing partss service life.

(2) technical scheme

To realize object above, this is achieved by the following technical programs：

A kind of bearing metal steel, by weight each group is divided into：C 0.5-0.8%, Si 0.02-0.05%, Nb 0.02- 0.1%th, Mn 0.05-0.2%, Mo 0.01-0.05%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.15- 0.35%th, Cr 0.1-1.5%, other cannot detached impurity≤0.002%, balance of Fe.

Described C 0.5%, Si 0.02%, Nb 0.02%, Mn 0.05%, Mo 0.01%, S≤0.005%, O≤ 0.001%th, P≤0.0015%, Al 0.15%, Cr 0.1%.

Described C 0.8%, Si 0.05%, Nb 0.1%, Mn 0.2%, Mo 0.05%, S≤0.005%, O≤ 0.001%th, P≤0.0015%, Al 0.35%, Cr 1.5%.

Described C 0.6%, Si 0.03%, Nb 0.08%, Mn 0.15%, Mo 0.03%, S≤0.005%, O≤ 0.001%th, P≤0.0015%, Al 0.2%, Cr 1%.

Bearing metal Heat-Treatment of Steel method, comprises the following steps：(1), steel alloy is warming up to into 850 ± 5 DEG C, is incubated 2- 5h；(2), steel alloy is carried out into water-cooled operation, then heats to 900 ± 5 DEG C, be incubated 1-3h；(3), step (2) is handled well Steel alloy is cooled to 450 ± 8 DEG C, and cooling extent is 2 DEG C/min, is incubated 1-2h.

(3) beneficial effect

Present embodiments provide a kind of bearing metal steel.Possesses following beneficial effect：Your gold steel alloy of the present invention reduces The usage amount of category, by using niobium, the use of nickel, makes steel alloy consistent internal structure, improves the intensity of steel alloy and wear-resisting Performance, the steel alloy processing method that the present invention is provided improves the intensity and anti-wear performance of steel alloy, while reducing steel alloy Production cost.

Specific embodiment

To make the purpose, technical scheme and advantage of the present embodiment clearer, the technical scheme in the present embodiment is carried out Clearly and completely describe, it is clear that described embodiment is this part of embodiment, rather than the embodiment of whole.Based on this In embodiment, the every other enforcement that those of ordinary skill in the art are obtained under the premise of creative work is not made Example, belongs to the scope of this protection.

A kind of embodiment 1, bearing metal steel, by weight each group is divided into：C 0.6%, Si 0.03%, Nb 0.08%, Mn 0.15%, Mo 0.03%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.2%, Cr 1%, other nothings Detached impurity≤0.002% of method, balance of Fe.

A kind of embodiment 2, bearing metal steel, by weight each group is divided into：Described C 0.5%, Si 0.02%, Nb 0.02%th, Mn 0.05%, Mo 0.01%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.15%, Cr 0.1%th, other cannot detached impurity≤0.002%, balance of Fe.

A kind of embodiment 3, bearing metal steel, by weight each group is divided into：Described C 0.8%, Si 0.05%, Nb 0.1%th, Mn 0.2%, Mo 0.05%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.35%, Cr 1.5%th, other cannot detached impurity≤0.002%, balance of Fe.

Steel alloy of the present invention reduces the usage amount of noble metal, by using niobium, the use of nickel, makes steel alloy internal structure Uniformly, the intensity and anti-wear performance of steel alloy are improve, the steel alloy processing method that the present invention is provided improves the strong of steel alloy Degree and anti-wear performance, while reducing the production cost of steel alloy.

Above example only to illustrate this technical scheme, rather than a limitation；Although with reference to the foregoing embodiments to this It has been described in detail, it will be understood by those within the art that：It still can be to described in foregoing embodiments Technical scheme modify, or equivalent is carried out to which part technical characteristic；And these modifications or replacement, not The essence for making appropriate technical solution departs from the spirit and scope of this each embodiment technical scheme.

Claims

1. a kind of bearing metal steel, it is characterised in that by weight each group is divided into：C 0.5-0.8%, Si 0.02-0.05%, Nb 0.02-0.1%, Mn 0.05-0.2%, Mo 0.01-0.05%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.15-0.35%, Cr 0.1-1.5%, other cannot detached impurity≤0.002%, balance of Fe.

2. bearing metal steel as claimed in claim 1, it is characterised in that described C 0.5%, Si 0.02%, Nb 0.02%th, Mn 0.05%, Mo 0.01%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.15%, Cr 0.1%.

3. bearing metal steel as claimed in claim 1, it is characterised in that described C 0.8%, Si 0.05%, Nb 0.1%th, Mn 0.2%, Mo 0.05%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.35%, Cr 1.5%.

4. bearing metal steel as claimed in claim 1, it is characterised in that described C 0.6%, Si 0.03%, Nb 0.08%th, Mn 0.15%, Mo 0.03%, S≤0.005%, O≤0.001%, P≤0.0015%, Al 0.2%, Cr 1%.

5. the bearing metal Heat-Treatment of Steel method according to one of claim 1-3, it is characterised in that including following Step：(1), steel alloy is warming up to into 850 ± 5 DEG C, is incubated 2-5h；(2), steel alloy is carried out into water-cooled operation, is then heated to 900 ± 5 DEG C, it is incubated 1-3h；(3), the steel alloy that step (2) is handled well being cooled to into 450 ± 8 DEG C, cooling extent is 2 DEG C/ Min, is incubated 1-2h.