CN105385817A - Universal joint spherical shell normalizing process with cutting performance improving function - Google Patents
Universal joint spherical shell normalizing process with cutting performance improving function Download PDFInfo
- Publication number
- CN105385817A CN105385817A CN201510766667.7A CN201510766667A CN105385817A CN 105385817 A CN105385817 A CN 105385817A CN 201510766667 A CN201510766667 A CN 201510766667A CN 105385817 A CN105385817 A CN 105385817A
- Authority
- CN
- China
- Prior art keywords
- less
- universal joint
- spherical shell
- equal
- joint spherical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a universal joint spherical shell normalizing process with the cutting performance improving function. The process includes the following steps that firstly, a carburizing steel material with the specific element composition ratio is selected and used for forging a universal joint spherical shell blank, wherein the blank comprises about 0.20% of carbon, about 0.27% of silicon, about 0.95% of manganese, about 1.15% of chromium, about 0.07% of titanium, not larger than 0.035% of sulfur, not larger than 0.035% of phosphorus, not larger than 0.030% of nickel, not larger than 0.030% of copper and the balance iron; secondly, a workpiece obtained from the first step is put in a furnace, and the temperature is increased to 940 DEG C to 960 DEG C at the constant speed and kept for 2.8 hours to 3.4 hours; and thirdly, the workpiece obtained from the second step is air-cooled and cooled to below 100 DEG C within 6 minutes to 8 minutes. By the adoption of the universal joint spherical shell normalizing process with the cutting performance improving function, the hardness of the normalized universal joint spherical shell workpiece can reach 182 HB to 212 HB and meets the standard, the machining quality is easy to control, and the product performance is good.
Description
Technical field
The present invention relates to a kind of universal joint spherical shell normalizing process improving cutting ability, belong to Car Drive Shaft constant velocity cardan joint product manufacturing technical field.
Background technology
Universal joint is automobile chassis key components and parts, and universal joint and transmission shaft combine, and are called cardan gear; On the vehicle that front engine rear wheel drives, cardan gear is arranged between transmission output shaft and main reducing gear of drive axle input shaft; And the vehicle that front engine, front drives eliminates transmission shaft, universal joint is arranged on not only to be responsible for driving but also to be responsible between the front axle half shaft that turns to and wheel, and its major function is when main drive shaft and driven shaft generation angular travel, can flexible communication power and torque.Constant velocity universal transmission mechanism is generally made up of fixing type equal speed universal joint, sliding constant velocity cardan joint and tunnel shaft.Fixing type equal speed universal joint is installed on wheel side, and sliding constant velocity cardan joint is installed on differential mechanism side, and tunnel shaft is used for universal-joint, plays the effect of transmitting motion and torque.Sliding constant velocity cardan joint comprises overcoat and rolling element, the slip of tunnel shaft and swing, rolling element can be driven to slide and swing, thus transmitting sliding power and torque.
Spherical shell universal joint is a kind of fixing type equal speed universal joint, and it mainly comprises spherical shell is also out star wheel, inner race, ball pin retainer and steel ball.In order to improve the cutting ability of universal joint spherical shell rough forging, so that carry out car, Milling Machining, need to carry out normalizing treatment to universal ball shell workpiece, universal ball shell workpiece normalizing treatment technique conventional in prior art mainly contains two kinds, one is after being heated to 860 DEG C of insulation scheduled times, speed is as cold as 680 DEG C and is incubated for some time again, is then placed in air naturally cooling; Another kind is that after being heated to 960 DEG C of insulation scheduled times, then mist is cold; For the universal ball shell workpiece of unlike material, need to develop specific thermal treatment process, need concrete optimization heat treated temperature, soaking time and the type of cooling.
Summary of the invention
The present invention for the deficiency that prior art exists, provides a kind of universal joint spherical shell normalizing process improving cutting ability, meets actual operation requirements just.
For solving the problem, the technical solution used in the present invention is as follows:
Improve a universal joint spherical shell normalizing process for cutting ability, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 940 DEG C ~ 960 DEG C, and soaking time is 2.8 hours ~ 3.4 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, in 6 minutes ~ 8 minutes, be cooled to less than 100 DEG C.
Further preferably, the universal joint spherical shell normalizing process of described raising cutting ability, comprises the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 950 DEG C, and soaking time is 3.2 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, be cooled to less than 100 DEG C with the speed that V-bar 2 DEG C is per second.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
The universal joint spherical shell normalizing process of raising cutting ability of the present invention, universal ball shell workpiece hardness after normalizing can reach 182HB ~ 212HB, meet the durometer level of 179HB ~ 217HB of car, Milling Machining requirement, processing quality is easy to control, good product performance.
Embodiment
Below in conjunction with specific embodiments content of the present invention is described.
Specific embodiment 1
Improve the universal joint spherical shell normalizing process of cutting ability described in the present embodiment, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 950 DEG C, and soaking time is 3.2 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, be cooled to less than 100 DEG C with the speed that V-bar 2 DEG C is per second.
Universal ball shell workpiece hardness after normalizing is 196HB ~ 208HB.
Specific embodiment 2
Improve the universal joint spherical shell normalizing process of cutting ability described in the present embodiment, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 940 DEG C, and soaking time is 3.4 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, in 6 minutes ~ 8 minutes, be cooled to less than 100 DEG C.
Universal ball shell workpiece hardness after normalizing is 209HB ~ 212HB.
Specific embodiment 3
Improve the universal joint spherical shell normalizing process of cutting ability described in the present embodiment, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 960 DEG C, and soaking time is 2.8 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, in 6 minutes ~ 8 minutes, be cooled to less than 100 DEG C.
Universal ball shell workpiece hardness after normalizing is 182HB ~ 201HB.
Comparative examples 1
Improve the universal joint spherical shell normalizing process of cutting ability described in the present embodiment, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 950 DEG C, and soaking time is 3 hours;
Step 3, by step 2 obtain workpiece carry out naturally cooling to less than 100 DEG C.
Universal ball shell workpiece hardness after normalizing is 161HB ~ 173HB.
Comparative examples 2
Improve the universal joint spherical shell normalizing process of cutting ability described in the present embodiment, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 940 DEG C, and soaking time is 3 hours;
Step 3, that the workpiece that step 2 obtains is carried out mist is cold, is cooled to less than 100 DEG C within 6 minutes.
Universal ball shell workpiece hardness after normalizing is 214HB ~ 229HB.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the present invention specifically implements to be only limitted to these explanations; For those skilled in the art, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (2)
1. improve a universal joint spherical shell normalizing process for cutting ability, it is characterized in that, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 940 DEG C ~ 960 DEG C, and soaking time is 2.8 hours ~ 3.4 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, in 6 minutes ~ 8 minutes, be cooled to less than 100 DEG C.
2. the universal joint spherical shell normalizing process improving cutting ability as claimed in claim 1, is characterized in that, comprise the following steps:
Step one, select converted steel material forging universal joint spherical shell blank containing following mass percent component: carbon 0.17% ~ 0.23%, silicon 0.17% ~ 0.37%, manganese 0.80% ~ 1.10%, chromium 1.00% ~ 1.30%, titanium 0.04% ~ 0.10%, sulphur is less than or equal to 0.035%, phosphorus is less than or equal to 0.035%, nickel is less than or equal to 0.030%, and copper is less than or equal to 0.030%, balance iron;
Step 2, workpiece shove charge step one obtained at the uniform velocity are warming up to 950 DEG C, and soaking time is 3.2 hours;
Step 3, by step 2 obtain workpiece carry out air-cooled, be cooled to less than 100 DEG C with the speed that V-bar 2 DEG C is per second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766667.7A CN105385817A (en) | 2015-11-12 | 2015-11-12 | Universal joint spherical shell normalizing process with cutting performance improving function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766667.7A CN105385817A (en) | 2015-11-12 | 2015-11-12 | Universal joint spherical shell normalizing process with cutting performance improving function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105385817A true CN105385817A (en) | 2016-03-09 |
Family
ID=55418590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510766667.7A Pending CN105385817A (en) | 2015-11-12 | 2015-11-12 | Universal joint spherical shell normalizing process with cutting performance improving function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105385817A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058800A (en) * | 2021-10-28 | 2022-02-18 | 万向钱潮股份有限公司 | Heat treatment method of cold extrusion three-pin frame |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646788A (en) * | 2007-03-29 | 2010-02-10 | 住友金属工业株式会社 | Case-hardened steel pipe excellent in workability and process for production thereof |
| CN101652494A (en) * | 2007-10-24 | 2010-02-17 | 新日本制铁株式会社 | Carburized and nitrided induction hardened steel part excellent in surface pressure fatigue strength at high temperature and manufacturing method thereof |
| CN101925687A (en) * | 2008-01-28 | 2010-12-22 | 株式会社神户制钢所 | Steel for machine structural use with excellent machinability |
| CN102282282A (en) * | 2009-01-16 | 2011-12-14 | 新日本制铁株式会社 | Steel for surface hardening for machine structural use, and component for machine structural use |
| CN102439187A (en) * | 2009-06-05 | 2012-05-02 | 株式会社神户制钢所 | Steel for machine structural use |
| CN103443316A (en) * | 2011-03-29 | 2013-12-11 | 株式会社神户制钢所 | Case hardening steel, method for producing same, and mechanical structural part using case hardening steel |
| CN103436808A (en) * | 2013-08-28 | 2013-12-11 | 武汉武船金属制造有限责任公司 | Low-carbon equivalent high strength and toughness cast steel and preparation method thereof |
-
2015
- 2015-11-12 CN CN201510766667.7A patent/CN105385817A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646788A (en) * | 2007-03-29 | 2010-02-10 | 住友金属工业株式会社 | Case-hardened steel pipe excellent in workability and process for production thereof |
| CN101652494A (en) * | 2007-10-24 | 2010-02-17 | 新日本制铁株式会社 | Carburized and nitrided induction hardened steel part excellent in surface pressure fatigue strength at high temperature and manufacturing method thereof |
| CN101925687A (en) * | 2008-01-28 | 2010-12-22 | 株式会社神户制钢所 | Steel for machine structural use with excellent machinability |
| CN102282282A (en) * | 2009-01-16 | 2011-12-14 | 新日本制铁株式会社 | Steel for surface hardening for machine structural use, and component for machine structural use |
| CN102439187A (en) * | 2009-06-05 | 2012-05-02 | 株式会社神户制钢所 | Steel for machine structural use |
| CN103443316A (en) * | 2011-03-29 | 2013-12-11 | 株式会社神户制钢所 | Case hardening steel, method for producing same, and mechanical structural part using case hardening steel |
| CN103436808A (en) * | 2013-08-28 | 2013-12-11 | 武汉武船金属制造有限责任公司 | Low-carbon equivalent high strength and toughness cast steel and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘玉兰等: "等速万向节轴承星形套的热处理工艺", 《轴承》 * |
| 曾正明: "《实用钢材手册》", 31 January 2015, 金盾出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058800A (en) * | 2021-10-28 | 2022-02-18 | 万向钱潮股份有限公司 | Heat treatment method of cold extrusion three-pin frame |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104384874B (en) | A kind of processing technology of automobile engine crankshaft | |
| CN105296732A (en) | Universal joint spherical shell quenching tempering process for improving metallurgical structure | |
| CN111360488A (en) | Processing method of caterpillar track link for caterpillar track | |
| CN105711337A (en) | Thermal treatment process for automobile semi-axles | |
| WO2010029841A1 (en) | Power transmission shaft, drive shaft, and propeller shaft | |
| CN107120357A (en) | A kind of bell shell structure of drive shaft and its technique processing method | |
| CN104264040B (en) | A kind of non-hardened and tempered steel and manufacture method thereof and use the bent axle that this non-hardened and tempered steel manufactures | |
| CN104328249A (en) | Heat treatment method of automotive full-hollow semi-axle | |
| CN103215428A (en) | Thermal treatment method of spline shaft head of transmission shaft | |
| CN105296733A (en) | Heat treatment technology for universal ball shell | |
| KR20170136040A (en) | Method for preparing precision metallic parts using compound forging and precision metallic parts prepared thereby | |
| JP6165497B2 (en) | Cage universal joint cage, fixed type constant velocity universal joint incorporating the same, and drive shaft incorporating the fixed type constant velocity universal joint | |
| CN106435370B (en) | Cold rolling high strength car sheet specialized high-speed steel roll and its manufacturing method | |
| CN105385817A (en) | Universal joint spherical shell normalizing process with cutting performance improving function | |
| CN102852958A (en) | Starter output shaft and processing technology thereof | |
| CN102699645B (en) | Isothermal normalizing process for gear of wind driven generator | |
| CN105420475A (en) | Quench tempering technology for reducing treatment of starlike sleeve | |
| CN105441863A (en) | Universal ball shell carburizing process capable of improving surface hardness | |
| CN100513809C (en) | Method of manufacturing hollow power transmission shaft | |
| JP5398965B2 (en) | Fixed constant velocity universal joint | |
| CN105296884A (en) | Quenching and tempering technology of starlike sleeve with stable inner diameter size | |
| KR100357875B1 (en) | Method of producing a tripod housing and a FTJ outer race for a constant velocity joint | |
| CN104195456B (en) | The special steel of a kind of high abrasion bearing and processing technique thereof | |
| CN105296737A (en) | Thermal treatment hole enlarging method for starlike sleeve | |
| CN102814627B (en) | Process for machining forging stock of crank of motorcycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |
|
| WD01 | Invention patent application deemed withdrawn after publication |