CN107955874A - A kind of axial workpiece and its process for machining equipped with surface selective hardening transition region - Google Patents
A kind of axial workpiece and its process for machining equipped with surface selective hardening transition region Download PDFInfo
- Publication number
- CN107955874A CN107955874A CN201711172504.1A CN201711172504A CN107955874A CN 107955874 A CN107955874 A CN 107955874A CN 201711172504 A CN201711172504 A CN 201711172504A CN 107955874 A CN107955874 A CN 107955874A
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- China
- Prior art keywords
- transition region
- selective hardening
- circular cone
- surface selective
- cone cylinder
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of axial workpiece equipped with surface selective hardening transition region, includes the axial workpiece of circular cone cylinder, its surface selective hardening transition area design is circular cone cylinder；The surface selective hardening transition region diameter of axle increases and intensity increase along circular cone cylinder；Circular cone cylinder major part belongs to surface selective hardening transition region, and circular cone cylinder microcephaly belongs to surface selective hardening area, and surface selective hardening transition region and the design of surface selective hardening area junction are in the middle part of the circular cone cylinder.The process for machining of the present invention can make all positions of axial workpiece bearing of surface selective hardening all have sufficiently reliable intensity, it is not likely to produce heat treatment crack, intensity will not be produced to drop suddenly, cracked, off-axis so as to avoid surface selective hardening transition region fatigue failure.
Description
Technical field
The present invention relates to technical field of mechanical transmission, and in particular to a kind of axis class zero equipped with surface selective hardening transition region
Part and its process for machining.
Background technology
Axis be support rotary part and turn round therewith with transmit movement, moment of torsion or moment of flexure critical mechanical part,
Very important effect is played in various machine drivings, and the working index of its most critical is intensity；Axis is after quenching, energy
The stiffness and strength of axis is set all to improve, so that more durable, quality higher.It is hot especially for reducing for the ease of processing and manufacturing
Processing deformation and processing cost, most number axis class require high shaft part to be designed as surface selective hardening stand under load is big, it is therefore an objective to are
The surface quality and fatigue strength of the shaft part are improved, but for the ease of processing and measuring, surface selective hardening shaft part is usually set
Count into cylindrical surface；Especially it is noted that when axis class in the past and now designs, never can to surface selective hardening changeover portion
Specially designed, it may be possible on cylindrical surface, or on fillet, even on escape, after the selective hardening of surface, by
Conduction of heat in adjacent surface quenching area, will necessarily produce drawing effect and reduce hardness and strength, produce intensity and drop suddenly,
The problems such as stress concentration occurs when working stand under load, cracks, cause fatigue failure and crack, off-axis；It is it can be seen from the above that existing
There is a kind of axial workpiece equipped with surface selective hardening transition region of design and processes of Axle Surface selective hardening transition region
Need to further it improve.
The content of the invention
The object of the present invention is to provide a kind of axial workpiece and its process for machining equipped with surface selective hardening transition region,
To solve after the selective hardening of surface, due to the conduction of heat of adjacent surface quenching area, drawing effect will necessarily be produced and dropped
Soft and intensity, produce the problems such as intensity drops, stress concentration occurs when working stand under load, cracks suddenly, cause fatigue
Fail and crack, off-axis.
The present invention is achieved in that a kind of axial workpiece equipped with surface selective hardening transition region, includes circular cone column
The axial workpiece in face, the surface selective hardening transition area design of the axial workpiece is circular cone cylinder；The surface selective hardening
The transition region diameter of axle increases and intensity increase along circular cone cylinder.
Further, the circular cone cylinder major part belongs to surface selective hardening transition region, and circular cone cylinder microcephaly belongs to surface
Selective hardening area, the surface selective hardening transition region and the design of surface selective hardening area junction are in the circular cone cylinder
Portion.
Further, the axial workpiece is quenched and tempered steel axial workpiece or carburizing steel axial workpiece.
A kind of process for machining of the axial workpiece equipped with surface selective hardening transition region, including it is following：
The surface selective hardening transition region of quenched and tempered steel axial workpiece：Circular cone cylinder is processed in quenched front and rear machining, is adjusted
Circular cone cylinder length before and after matter is consistent, it is quenched after processing taper with design taper it is equal, also with quenched preceding processing taper
Identical, allowance of the circular cone cylinder with other positions after quenched is identical and uniform, surface selective hardening transition after quenching
Area's hardness gradient and intensity gradient are very gentle；
The surface selective hardening transition region of carburizing steel axial workpiece：Machining before carburizing processes circular cone cylinder, but carburizing
Preceding processing taper is less than design taper, and the circular cone cylinder that the circular cone cylinder length processed before carburizing is more than carburizing post-processing is grown
Degree；The circular cone cylinder that processes design of the surface selective hardening transition region after carburizing, processing taper after carburizing with
It is equal to design taper；
Further, the surface selective hardening transition region of the carburizing steel axial workpiece, after the machining after carburizing, after carburizing
Allowance gradually become shallower as the case-carbonizing layer depth of transition region along taper microcephaly to major part direction, the concentration of carbon on most top layer
Gradually it is lower along taper microcephaly to major part direction；Selective hardening transition region hardness gradient and strong after the selective hardening of surface on surface
It is very gentle to spend gradient.
Beneficial effects of the present invention：
1. the diameter of axle of surface selective hardening transition region increases and intensity increase along circular cone column, although this makes transition region by surface office
Portion's quenching rear surface intensity decreases, but still ensures that each position has sufficiently reliable intensity；
2. the present invention is not likely to produce heat treatment crack, intensity will not be produced and dropped suddenly, when working stand under load, improve load on axle point
Cloth situation, will not because intensity drops suddenly and stress concentration cracks, so as to avoid surface selective hardening transition region fatigue failure
And crack, off-axis；Have a good application prospect.
Brief description of the drawings
Fig. 1 is Axle Surface selective hardening transition region schematic diagram provided by the present invention；
Fig. 2 is quenched and tempered steel Axle Surface selective hardening transition region provided by the present invention in quenched front and rear process for machining
Size and surplus design schematic diagram；
Fig. 3 is process for machining of the carburizing steel Axle Surface selective hardening transition region provided by the present invention before and after carburizing
Size and surplus design schematic diagram.
In attached drawing：1st, axial workpiece, 2, circular cone cylinder, 3, surface selective hardening area, 4, surface selective hardening transition region,
A1, it is quenched after allowance, L1, quenched front and rear circular cone cylinder length, b11, it is quenched after processing taper, b12, tune
Processing taper before matter, the allowance after a2, carburizing, c2, carburized (case) depth, the processing taper after b21, carburizing, b22, ooze
Processing taper before carbon, L21, the circular cone cylinder length of carburizing post-processing, the circular cone cylinder length processed before L22, carburizing.
Embodiment
The embodiment of the present invention is described in further detail with reference to embodiment：
As shown in Figure 1, a kind of axial workpiece equipped with surface selective hardening transition region, to include the axis class zero of circular cone cylinder 2
Part 1, Axle Surface selective hardening transition region 4 are designed as circular cone cylinder 2；Selective hardening transition region 4 diameter of axle in surface is along circular cone
Cylinder increases and intensity increase；Circular cone cylinder major part belongs to surface selective hardening transition region 4, and 2 microcephaly of circular cone cylinder belongs to surface
Selective hardening area 3, surface selective hardening transition region 4 and the design of 3 junction of surface selective hardening area are in the middle part of circular cone cylinder 2, axis
Class part 1 is quenched and tempered steel axial workpiece or carburizing steel axial workpiece.
A kind of process for machining of the axial workpiece equipped with surface selective hardening transition region, as shown in Figures 2 and 3, including
Below：
The surface selective hardening transition region of quenched and tempered steel axial workpiece：Circular cone cylinder is processed in quenched front and rear machining, is adjusted
Circular cone cylinder length L1 before and after matter is consistent, it is quenched after processing taper b11 with design taper it is equal, also with quenched preceding processing
Taper b12 is identical, and the allowance a1 of circular cone cylinder and other positions after quenched is identical and uniform, and surface after quenching is local
Quench transition region hardness gradient and intensity gradient is very gentle；
The surface selective hardening transition region of carburizing steel axial workpiece：Machining before carburizing processes circular cone cylinder, but carburizing
Preceding processing taper b22 is less than design taper, and the circular cone cylinder length L22 processed before carburizing is more than the circular cone column of carburizing post-processing
Face length L21；The circular cone cylinder that processes design of the surface selective hardening transition region after carburizing, the processing after carburizing
Taper b21 is equal with design taper；
Further, the surface selective hardening transition region of carburizing steel axial workpiece, after the machining after carburizing, adding after carburizing
Spare time amount a2 is that the case-carbonizing layer depth c2 of transition region gradually becomes shallower as along taper microcephaly to major part direction, the concentration of carbon on most top layer
Also gradually it is lower along taper microcephaly to major part direction；On surface selective hardening transition region after the selective hardening of surface hardness gradient and
Intensity gradient is very gentle.
The above is only the preferred embodiment of the present invention, it is noted that is come for those of ordinary skill in the art
Say, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
When being considered as within protection scope of the present invention.
Claims (5)
1. a kind of axial workpiece equipped with surface selective hardening transition region, includes the axial workpiece of circular cone cylinder, its feature exists
In the surface selective hardening transition area design of the axial workpiece is circular cone cylinder；The surface selective hardening transition region diameter of axle
Along the increase of circular cone cylinder, intensity increases.
2. a kind of axial workpiece equipped with surface selective hardening transition region according to claim 1, it is characterised in that described
Circular cone cylinder major part belongs to surface selective hardening transition region, and circular cone cylinder microcephaly belongs to surface selective hardening area, the surface office
Portion quenches transition region and the design of surface selective hardening area junction in the middle part of the circular cone cylinder.
A kind of 3. axial workpiece equipped with surface selective hardening transition region according to claim 1 or 2, it is characterised in that
The axial workpiece is quenched and tempered steel axial workpiece or carburizing steel axial workpiece.
4. a kind of process for machining of the axial workpiece equipped with surface selective hardening transition region, including it is following：Quenched and tempered steel shaft class zero
The surface selective hardening transition region of part：Circular cone cylinder, quenched front and rear circular cone cylinder are processed in quenched front and rear machining
Length is consistent, it is quenched after processing taper with design taper it is equal, it is also identical with quenched preceding processing taper, circular cone cylinder and its
Allowance after its position is quenched is identical and uniform, surface selective hardening transition region hardness gradient and intensity ladder after quenching
Degree is very gentle；The surface selective hardening transition region of carburizing steel axial workpiece：Machining before carburizing processes circular cone column
Face, but the processing taper before carburizing is less than design taper, and the circular cone cylinder length processed before carburizing is more than the circle of carburizing post-processing
Bore cylinder length；The circular cone cylinder that processes design of the surface selective hardening transition region after carburizing, adding after carburizing
Work taper is equal with design taper.
5. process for machining according to claim 4, it is characterised in that locally quench on the surface of the carburizing steel axial workpiece
Fiery transition region, after the machining after carburizing, allowance after carburizing for transition region case-carbonizing layer depth along taper microcephaly
Gradually become shallower as to major part direction, the concentration of carbon on most top layer is also gradually lower along taper microcephaly to major part direction；Locally quench on surface
Fiery transition region hardness gradient and intensity gradient after the selective hardening of surface is very gentle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711172504.1A CN107955874B (en) | 2017-11-22 | 2017-11-22 | Shaft part with surface local quenching transition area and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711172504.1A CN107955874B (en) | 2017-11-22 | 2017-11-22 | Shaft part with surface local quenching transition area and machining process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107955874A true CN107955874A (en) | 2018-04-24 |
| CN107955874B CN107955874B (en) | 2020-09-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711172504.1A Active CN107955874B (en) | 2017-11-22 | 2017-11-22 | Shaft part with surface local quenching transition area and machining process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107955874B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819786A (en) * | 2019-11-20 | 2020-02-21 | 宿州市祁南工贸有限责任公司 | Machining process suitable for sun wheel bearing of large speed reducer |
| CN112916647A (en) * | 2020-12-30 | 2021-06-08 | 天津钢管制造有限公司 | Method for improving pipe end size precision of deep-sea steel catenary riser |
| CN114134307A (en) * | 2021-10-27 | 2022-03-04 | 常州丰川机电有限公司 | Local quenching process, local quenching tool and small shaft part |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269846A (en) * | 1997-09-10 | 2000-10-11 | 桑德维克公司 | Device, drill member and method for masking member at thermo chemical surface treatment |
| CN101460639A (en) * | 2006-06-06 | 2009-06-17 | 西门子公司 | Process for applying internal compressive stresses in a shaft, in particular in shaft chamferings |
| CN202357798U (en) * | 2011-11-28 | 2012-08-01 | 洪泽县汽车半轴制造有限公司 | Half axle of light-duty truck |
| CN103341743A (en) * | 2013-07-08 | 2013-10-09 | 河北华北柴油机有限责任公司 | Anti-cracking machining method of small axial surface carburizing and hardening stepped shaft with end face provided with groove |
| CN105081692A (en) * | 2015-08-04 | 2015-11-25 | 南车戚墅堰机车有限公司 | Machining method for tapered strength structure of oil hole of piston pin of large-powder diesel engine |
| CN107107959A (en) * | 2015-03-02 | 2017-08-29 | 宝马股份公司 | The sheet metal forming part of pressure quench with different plate thickness and intensity |
-
2017
- 2017-11-22 CN CN201711172504.1A patent/CN107955874B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269846A (en) * | 1997-09-10 | 2000-10-11 | 桑德维克公司 | Device, drill member and method for masking member at thermo chemical surface treatment |
| CN101460639A (en) * | 2006-06-06 | 2009-06-17 | 西门子公司 | Process for applying internal compressive stresses in a shaft, in particular in shaft chamferings |
| CN202357798U (en) * | 2011-11-28 | 2012-08-01 | 洪泽县汽车半轴制造有限公司 | Half axle of light-duty truck |
| CN103341743A (en) * | 2013-07-08 | 2013-10-09 | 河北华北柴油机有限责任公司 | Anti-cracking machining method of small axial surface carburizing and hardening stepped shaft with end face provided with groove |
| CN107107959A (en) * | 2015-03-02 | 2017-08-29 | 宝马股份公司 | The sheet metal forming part of pressure quench with different plate thickness and intensity |
| CN105081692A (en) * | 2015-08-04 | 2015-11-25 | 南车戚墅堰机车有限公司 | Machining method for tapered strength structure of oil hole of piston pin of large-powder diesel engine |
Non-Patent Citations (2)
| Title |
|---|
| 文九巴编著: "《机械工程材料》", 31 July 2009, 北京：机械工业出版社 * |
| 沈庆通编: "《感应热处理技术300问》", 30 June 2013, 北京：机械工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819786A (en) * | 2019-11-20 | 2020-02-21 | 宿州市祁南工贸有限责任公司 | Machining process suitable for sun wheel bearing of large speed reducer |
| CN112916647A (en) * | 2020-12-30 | 2021-06-08 | 天津钢管制造有限公司 | Method for improving pipe end size precision of deep-sea steel catenary riser |
| CN114134307A (en) * | 2021-10-27 | 2022-03-04 | 常州丰川机电有限公司 | Local quenching process, local quenching tool and small shaft part |
| CN114134307B (en) * | 2021-10-27 | 2023-09-12 | 常州丰川机电有限公司 | Local quenching process, local quenching tool and small shaft part |
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| Publication number | Publication date |
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| CN107955874B (en) | 2020-09-04 |
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