CN107312923A - A kind of high crush load steel ball and its processing method - Google Patents
A kind of high crush load steel ball and its processing method Download PDFInfo
- Publication number
- CN107312923A CN107312923A CN201710577875.1A CN201710577875A CN107312923A CN 107312923 A CN107312923 A CN 107312923A CN 201710577875 A CN201710577875 A CN 201710577875A CN 107312923 A CN107312923 A CN 107312923A
- Authority
- CN
- China
- Prior art keywords
- steel ball
- base substrate
- processing method
- condition
- temper
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
- B24B11/02—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls
- B24B11/04—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
Abstract
The invention discloses a kind of high crush load steel ball and its processing method, the processing method includes：Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M；Base substrate M progress first time temper is obtained into base substrate N；Second of temper of base substrate N progress is obtained into base substrate F；Base substrate F is obtained into high crush load steel ball after surface Seiko and photoelectricity vortex screening；Solve in steel ball production technology, the steel ball crushing load value after tempering of quenching is relatively low, has had a strong impact on the technical performance index of steel ball, the fatigue life of steel ball is also greatly limited, the problem of can not having met the need for growing infant industry.
Description
Technical field
The present invention relates to steel ball processing field, in particular it relates to high crush load steel ball and its processing method.
Background technology
The existing 56 years history of firstling was produced in China's steel ball industry from 1948, was sent out from technological progress and industry
Exhibition sees that the development after reform and opening-up is the most fast stage, and current China's steel ball industry can produce the steel of mm more than 0.5~200
Ball, precision can manufacture G1000~G10, and product is widely used in bearing, engineering machinery, household electrical appliance, automobile, agricultural
The industries such as machinery, lathe, motorcycle, metallurgy, chemical industry, instrument and meter, China has become most state of steel ball enterprise in the world
Family, is also the maximum country of yield.In steel ball production technology, steel ball quench tempering after crushing load value it is relatively low, have a strong impact on
The technical performance index of steel ball, the fatigue life of steel ball is also greatly limited, and can not meet growing emerging work
The need for industry.
The content of the invention
It is an object of the invention to provide a kind of high crush load steel ball and its processing method, solve in steel ball production technology
In, steel ball quench tempering after crushing load value it is relatively low, had a strong impact on the technical performance index of steel ball, the fatigue life of steel ball
It is greatly limited, the problem of can not having met the need for growing infant industry.
To achieve these goals, the invention provides a kind of processing method of high crush load steel ball, the processing side
Method includes：
（1）Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment is at least wrapped
Include：The temperature of quenching is 750-780 DEG C, and the time of quenching is 10-20min；
（2）Base substrate M progress first time temper is obtained into base substrate N, wherein, the condition of first time temper at least includes：
Temperature is 110-120 DEG C, and tempering time is 1-2h；
（3）Second of temper of base substrate N progress is obtained into base substrate F, wherein, the condition of second of temper at least includes：
Temperature is 50-60 DEG C, and tempering time is 30-40min；
（4）Base substrate F is obtained into high crush load steel ball after surface Seiko and photoelectricity vortex screening.
Present invention also offers a kind of processing method of high crush load steel ball, the high crush load steel ball is by above-mentioned
Processing method is made.
By above-mentioned technical proposal, the invention provides a kind of high crush load steel ball and its processing method, the processing
Method includes：Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment is at least
Including：The temperature of quenching is 750-780 DEG C, and the time of quenching is 10-20min；Base substrate M progress first time temper is obtained
Base substrate N, wherein, the condition of first time temper at least includes：Temperature is 110-120 DEG C, and tempering time is 1-2h；Will
Base substrate N carries out second of temper and obtains base substrate F, wherein, the condition of second of temper at least includes：Temperature is
50-60 DEG C, tempering time is 30-40min；Base substrate F is obtained into high crush load steel after surface Seiko and photoelectricity vortex screening
Ball；Smaller, the table by the steel ball ball lot diameter variation processed by the present invention and deviation from spherical form of steel ball produced by the present invention
Surface roughness is low.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Embodiment
The embodiment to the present invention is described in detail below.It should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points and any value of disclosed scope are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The invention provides a kind of processing method of high crush load steel ball, the processing method includes：
（1）Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment is at least wrapped
Include：The temperature of quenching is 750-780 DEG C, and the time of quenching is 10-20min；
（2）Base substrate M progress first time temper is obtained into base substrate N, wherein, the condition of first time temper at least includes：
Temperature is 110-120 DEG C, and tempering time is 1-2h；
（3）Second of temper of base substrate N progress is obtained into base substrate F, wherein, the condition of second of temper at least includes：
Temperature is 50-60 DEG C, and tempering time is 30-40min；
（4）Base substrate F is obtained into high crush load steel ball after surface Seiko and photoelectricity vortex screening.
The present invention it is a kind of preferred embodiment in, in order to further improve the quality of obtained steel ball, steel ball hair
The composition of base includes by weight percentage：C：0.1-0.25%、Si：0.35-0.45%、Cu：0.02-0.04%、Mg：0.05-
0.07%、Ti：0.14-0.23%、V：0.04-0.06%、Ca：0.015-0.018%、S：0.01-0.02%、P：0.08-0.09%、
Mo：0.06-0.09% and surplus Fe.
The present invention it is a kind of preferred embodiment in, in order to further improve the quality of obtained steel ball, quenching is situated between
One or more of the matter in aqueous sodium carbonate, polyvinyl alcohol water solution and three glass gall solution.
The present invention it is a kind of preferred embodiment in, in order to further improve the quality of obtained steel ball, surface essence
The specific method of work is：Base substrate F is subjected to early grind and lappingout on grinder；Wherein,
The condition of early grind at least includes：Granularity is used to be ground for the resin wheel of 2000-3000 mesh, the speed of grinding is
10-15r/min, pressure is 2-3kN；
The condition of lappingout at least includes：Granularity is used to be ground for the resin wheel of 5000-6000 mesh, the speed of grinding is
20-25r/min, pressure is 1-2kN.
The present invention it is a kind of preferred embodiment in, in order to further improve the quality of obtained steel ball, in early grind
In lappingout, one or more of the grinding agent in corundum, carborundum and boron carbide.
The present invention it is a kind of preferred embodiment in, in order to further improve the quality of obtained steel ball, in photoelectricity
In vortex screening, the Percentage Criterion of photoelectric probe the reflected beams is set as 20-50%.
Present invention also offers a kind of processing method of high crush load steel ball, the high crush load steel ball is by above-mentioned
Processing method is made.
The present invention will be described in detail by way of examples below.
Embodiment 1
Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment at least includes：
The temperature of quenching is 750 DEG C, and the time of quenching is 10min；Base substrate M progress first time temper is obtained into base substrate N, wherein,
The condition of first time temper at least includes：Temperature is 110 DEG C, and tempering time is 1h；Base substrate N is carried out second time
Fire processing obtains base substrate F, wherein, the condition of second of temper at least includes：Temperature is 50 DEG C, and tempering time is
30min；By base substrate F through surface Seiko（Surface Seiko includes carrying out early grind and lappingout successively, and the condition of early grind at least includes：Adopt
It is ground with granularity for the resin wheel of 2000 mesh, the speed of grinding is 10r/min, and pressure is 2kN；The condition of lappingout is at least
Including：Granularity is used to be ground for the resin wheel of 5000 mesh, the speed of grinding is 20r/min, and pressure is 1kN）And photoelectricity
Vortex screening（The Percentage Criterion of photoelectric probe the reflected beams is set as 20%）After obtain high crush load steel ball A1；Steel ball hair
The composition of base includes by weight percentage：C：0.1%、Si：0.35%、Cu：0.02%、Mg：0.05%、Ti：0.14%、V：0.04%、
Ca：0.015%、S：0.01%、P：0.08%、Mo：0.06% and surplus Fe.
Embodiment 2
Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment at least includes：
The temperature of quenching is 780 DEG C, and the time of quenching is 20min；Base substrate M progress first time temper is obtained into base substrate N, wherein,
The condition of first time temper at least includes：Temperature is 120 DEG C, and tempering time is 2h；Base substrate N is carried out second time
Fire processing obtains base substrate F, wherein, the condition of second of temper at least includes：Temperature is 60 DEG C, and tempering time is
40min；By base substrate F through surface Seiko（Surface Seiko includes carrying out early grind and lappingout successively, and the condition of early grind at least includes：Adopt
It is ground with granularity for the resin wheel of 3000 mesh, the speed of grinding is 15r/min, and pressure is 3kN；The condition of lappingout is at least
Including：Granularity is used to be ground for the resin wheel of 6000 mesh, the speed of grinding is 25r/min, and pressure is 2kN）And photoelectricity
Vortex screening（The Percentage Criterion of photoelectric probe the reflected beams is set as 50%）After obtain high crush load steel ball A2；Steel ball hair
The composition of base includes by weight percentage：C： 0.25%、Si： 0.45%、Cu： 0.04%、Mg： 0.07%、Ti： 0.23%、V：
0.06%、Ca： 0.018%、S： 0.02%、P： 0.09%、Mo：0.09% and surplus Fe.
Embodiment 3
Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment at least includes：
The temperature of quenching is 765 DEG C, and the time of quenching is 15min；Base substrate M progress first time temper is obtained into base substrate N, wherein,
The condition of first time temper at least includes：Temperature is 115 DEG C, and tempering time is 1.5h；Base substrate N is carried out second
Temper obtains base substrate F, wherein, the condition of second of temper at least includes：Temperature is 55 DEG C, and tempering time is
35min；By base substrate F through surface Seiko（Surface Seiko includes carrying out early grind and lappingout successively, and the condition of early grind at least includes：Adopt
It is ground with granularity for the resin wheel of 2000 mesh, the speed of grinding is 12r/min, and pressure is 2.5kN；The condition of lappingout is extremely
Include less：Granularity is used to be ground for the resin wheel of 6000 mesh, the speed of grinding is 22r/min, and pressure is 1.5kN）With
Photoelectricity vortex screening（The Percentage Criterion of photoelectric probe the reflected beams is set as 30%）After obtain high crush load steel ball A3；Steel
The composition of ball blank includes by weight percentage：C：0.15%、Si：0.4%、Cu：0.03%、Mg：0.06%、Ti：0.18%、V：
0.05%、Ca：0.016%、S：0.015%、P：0.085%、Mo：0.07% and surplus Fe.
Comparative example 1
Carried out according to the method for embodiment 3, unlike, the condition of first time temper at least includes：Temperature is 100
DEG C, tempering time is 0.8h；The condition of second of temper at least includes：Temperature is 40 DEG C, and tempering time is
25min。
Comparative example 2
Carried out according to the method for embodiment 3, unlike, the condition of first time temper at least includes：Temperature is 130
DEG C, tempering time is 2.5h；The condition of second of temper at least includes：Temperature is 65 DEG C, and tempering time is
45min。
Test case
The quantity of high crush load steel ball is 50 made from each embodiment and comparative example, and every 50 steel balls are one group, to every
The steel ball of group carries out variation in diameter amount, ball-type error, surface roughness measurement and averagely crushes load value.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (7)
1. a kind of processing method of high crush load steel ball, it is characterised in that the processing method includes：
（1）Steel ball blanks are subjected to Quenching Treatment in hardening media and obtain base substrate M, wherein, the condition of Quenching Treatment is at least wrapped
Include：The temperature of quenching is 750-780 DEG C, and the time of quenching is 10-20min；
（2）Base substrate M progress first time temper is obtained into base substrate N, wherein, the condition of first time temper at least includes：
Temperature is 110-120 DEG C, and tempering time is 1-2h；
（3）Second of temper of base substrate N progress is obtained into base substrate F, wherein, the condition of second of temper at least includes：
Temperature is 50-60 DEG C, and tempering time is 30-40min；
（4）Base substrate F is obtained into high crush load steel ball after surface Seiko and photoelectricity vortex screening.
2. processing method according to claim 1, wherein, the composition of steel ball blanks includes by weight percentage：C：0.1-
0.25%、Si：0.35-0.45%、Cu：0.02-0.04%、Mg：0.05-0.07%、Ti：0.14-0.23%、V：0.04-0.06%、
Ca：0.015-0.018%、S：0.01-0.02%、P：0.08-0.09%、Mo：0.06-0.09% and surplus Fe.
3. processing method according to claim 1 or 2, wherein, hardening media is selected from aqueous sodium carbonate, polyvinyl alcohol water
One or more in solution and three glass gall solution.
4. processing method according to claim 1 or 2, wherein, the specific method of surface Seiko is：By base substrate F in grinding
Early grind and lappingout are carried out on machine；Wherein,
The condition of early grind at least includes：Granularity is used to be ground for the resin wheel of 2000-3000 mesh, the speed of grinding is
10-15r/min, pressure is 2-3kN；
The condition of lappingout at least includes：Granularity is used to be ground for the resin wheel of 5000-6000 mesh, the speed of grinding is
20-25r/min, pressure is 1-2kN.
5. processing method according to claim 4, wherein, in early grind and lappingout, grinding agent be selected from corundum, carborundum and
One or more in boron carbide.
6. processing method according to claim 1 or 2, wherein, in photoelectricity vortex screening, photoelectric probe the reflected beams
Percentage Criterion is set as 20-50%.
7. a kind of processing method of high crush load steel ball, it is characterised in that the high crush load steel ball is by claim 1-6
Processing method described in middle any one is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577875.1A CN107312923A (en) | 2017-07-15 | 2017-07-15 | A kind of high crush load steel ball and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710577875.1A CN107312923A (en) | 2017-07-15 | 2017-07-15 | A kind of high crush load steel ball and its processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107312923A true CN107312923A (en) | 2017-11-03 |
Family
ID=60178010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710577875.1A Pending CN107312923A (en) | 2017-07-15 | 2017-07-15 | A kind of high crush load steel ball and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107312923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126767A (en) * | 2020-09-04 | 2020-12-25 | 湖北钱潮精密件有限公司 | Quenching and tempering process of GCr15 steel ball |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580311A (en) * | 2004-05-17 | 2005-02-16 | 重庆市大足县特殊锻压厂 | Vanadium-titanium-chromium alloy steel ball and its manufacture method |
| CN101381848A (en) * | 2008-10-23 | 2009-03-11 | 常熟市龙腾特种钢有限公司 | Method of preparing wearable steel ball |
| CN102212669A (en) * | 2010-07-21 | 2011-10-12 | 江苏通用钢球滚子有限公司 | Heat treatment process of high-speed precision bearing steel ball |
| CN102489646A (en) * | 2011-12-23 | 2012-06-13 | 攀枝花钢城集团瑞矿工业有限公司 | Method for processing steel ball |
| CN102828100A (en) * | 2012-08-13 | 2012-12-19 | 陈德祥 | Heat treatment method for ultralow manganese grinding ball or grinding segment |
| CN102899475A (en) * | 2012-09-14 | 2013-01-30 | 上海钢球厂 | Steel ball for blower fan |
| CN103045840A (en) * | 2012-07-31 | 2013-04-17 | 江苏力星通用钢球股份有限公司 | High-pressure crushing thermal processing method for steel ball special for bearing of 5MW (Megawatt) large wind turbine unit |
| CN105729071A (en) * | 2016-04-27 | 2016-07-06 | 安顺市虹翼特种钢球制造有限公司 | High-precision austenitic stainless steel ball machining method |
| CN105861922A (en) * | 2016-04-28 | 2016-08-17 | 胡银基 | Long-life steel ball for surface treatment and preparation method of steel ball |
-
2017
- 2017-07-15 CN CN201710577875.1A patent/CN107312923A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580311A (en) * | 2004-05-17 | 2005-02-16 | 重庆市大足县特殊锻压厂 | Vanadium-titanium-chromium alloy steel ball and its manufacture method |
| CN101381848A (en) * | 2008-10-23 | 2009-03-11 | 常熟市龙腾特种钢有限公司 | Method of preparing wearable steel ball |
| CN102212669A (en) * | 2010-07-21 | 2011-10-12 | 江苏通用钢球滚子有限公司 | Heat treatment process of high-speed precision bearing steel ball |
| CN102489646A (en) * | 2011-12-23 | 2012-06-13 | 攀枝花钢城集团瑞矿工业有限公司 | Method for processing steel ball |
| CN103045840A (en) * | 2012-07-31 | 2013-04-17 | 江苏力星通用钢球股份有限公司 | High-pressure crushing thermal processing method for steel ball special for bearing of 5MW (Megawatt) large wind turbine unit |
| CN102828100A (en) * | 2012-08-13 | 2012-12-19 | 陈德祥 | Heat treatment method for ultralow manganese grinding ball or grinding segment |
| CN102899475A (en) * | 2012-09-14 | 2013-01-30 | 上海钢球厂 | Steel ball for blower fan |
| CN105729071A (en) * | 2016-04-27 | 2016-07-06 | 安顺市虹翼特种钢球制造有限公司 | High-precision austenitic stainless steel ball machining method |
| CN105861922A (en) * | 2016-04-28 | 2016-08-17 | 胡银基 | Long-life steel ball for surface treatment and preparation method of steel ball |
Non-Patent Citations (2)
| Title |
|---|
| 崔忠圻 等: "《金属学与热处理 第2版》", 30 June 2011 * |
| 马亚良 等: "《轴承制造技术》", 31 October 2008 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126767A (en) * | 2020-09-04 | 2020-12-25 | 湖北钱潮精密件有限公司 | Quenching and tempering process of GCr15 steel ball |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101186995A (en) | Medium carbon bearing steel and its preparation method | |
| CN106475746A (en) | A kind of processing method of steel ball with high precision | |
| CN104451487B (en) | Method for preparing copper alloy nanometer gradient material | |
| CN105088085A (en) | High-performance cold mill intermediate roll and preparation method thereof | |
| CN104033189B (en) | A kind of processing technology of turbine blade | |
| CN110029270A (en) | A kind of high-carbon steel wire rod that exempting from pickling dephosphorization and its production method | |
| CN104711486A (en) | High speed steel cold roller | |
| CN107881423B (en) | Cold heading steel, preparation method thereof and method for preparing steel wire by adopting cold heading steel | |
| CN107312923A (en) | A kind of high crush load steel ball and its processing method | |
| CN105063503A (en) | Highly abrasion-resistant cold roller and preparation method thereof | |
| CN107160116A (en) | Carbon steel valve element preparation method for petroleum pipeline | |
| CN107760973B (en) | A kind of processing method of austenitic stainless steel for building | |
| CN106391698A (en) | High-tenacity large-specification angle steel production machining technology | |
| CN112371721A (en) | Production method of hot-rolled ribbed steel bar | |
| JPH03146618A (en) | Production of cold forging steel | |
| CN114032470B (en) | Carburizing bearing steel and preparation method thereof | |
| JPS62109926A (en) | Manufacture of highly wear resistant rolling roll | |
| CN110964986B (en) | High-temperature oxidation resistant high-boron high-speed steel for silicon-aluminum-chromium roller | |
| US2310987A (en) | Grinding ball and the method of making the same | |
| JPH02294451A (en) | Bearing steel for cold working | |
| JP2002105536A (en) | Method for producing blank for bearing excellent in finish-grinding polishing property and blank for bearing excellent in finish-grinding polishing property produced by this method | |
| CN101545029B (en) | Method for improving corrosion performance of bulk amorphous alloy through oxidizing annealing in air atmosphere | |
| CN116393664B (en) | Composite stainless steel wire and processing technology thereof | |
| JP2006219726A (en) | Method for manufacturing race of rolling bearing | |
| CN114406612B (en) | Preparation method of G20-grade 316L precision stainless steel soft ball |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171103 |