CN109945823A - The detection method of steel components manufacturing procedure deflection - Google Patents
The detection method of steel components manufacturing procedure deflection Download PDFInfo
- Publication number
- CN109945823A CN109945823A CN201910307437.2A CN201910307437A CN109945823A CN 109945823 A CN109945823 A CN 109945823A CN 201910307437 A CN201910307437 A CN 201910307437A CN 109945823 A CN109945823 A CN 109945823A
- Authority
- CN
- China
- Prior art keywords
- tempering
- steel components
- critical size
- treatment
- deflection
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to a kind of detection methods of steel components manufacturing procedure deflection, comprising the following steps: the critical size a for the steel components that measurement is obtained through pre-treatment；The steel components obtained through pre-treatment are subjected to tempering, the tempering temperature is 500 DEG C~580 DEG C, the soaking time of the tempering is the effective dimensions of the steel components and the product of heating coefficient, and the heating coefficient is 1.5~2.5 hours/inch；Measure the critical size b of the steel components through the tempering；According to the normal deformation amount c of critical size b, critical size a and the tempering, deflection d of the steel components through the pre-treatment, normal deformation amount c≤0.01mm of the tempering are obtained.The detection method can be used for quantifying the deflection of each manufacturing procedure, and analysis speed is fast, if it is 1 day or so general, and cost is significantly reduced than Metallographic Analysis method.
Description
Technical field
The present invention relates to part manufacturing fields, more particularly to a kind of detection side of steel components manufacturing procedure deflection
Method.
Background technique
Steel components such as axis class, gear part etc. are needed in process by multiple working procedure, such as blanking, forging
It makes, normalizing, roughing, quenched, (partly) finishing, carburizing, nitridation, medium-high frequency, finishing etc..All there may be different for every procedure
Often deformation, the deformation size of every procedure can all influence the final deformation and quality of part.It is existing if part deformation is unqualified
Method be part is deformed (failure) analysis, i.e., dissection part and measure chemical component, metallographic structure, heat-treated sturcture,
Residual stress etc. to find out the possible cause of part deformation, then passes through verification experimental verification.But this is a kind of qualitative analysis, no
How much is each process deformation of energy accurate judgement, and a kind of relatively time-consuming, higher cost method.Therefore, manufacturing industry needs
The quantization method to the deformation of steel components manufacturing procedure of simple possible.
Summary of the invention
Based on this, it is necessary to provide a kind of steel components processing that can be deformed and be quantified to steel components manufacturing procedure
The detection method of process deflection.
A kind of detection method of steel components manufacturing procedure deflection, comprising the following steps:
Measure the critical size a of the steel components obtained through pre-treatment；
The steel components obtained through pre-treatment are subjected to tempering, the tempering temperature is 500 DEG C~580 DEG C,
The soaking time of the tempering is the effective dimensions of the steel components and the product of heating coefficient, and the heating coefficient is
1.5~2.5 hours/inch；
Measure the critical size b of the steel components through the tempering；
According to the normal deformation amount c of critical size b, critical size a and the tempering, the steel components warp is obtained
The deflection d of the pre-treatment, normal deformation amount c≤0.01mm of the tempering.
Detection method of the invention is controlled specific by that will carry out tempering through the steel components that pre-treatment obtains
Tempering temperature and soaking time, the residual stress for accumulating steel components in pretreatment process steadily release, simultaneously
Deflection caused by tempering itself is smaller and stablizes.Then pass through the crucial ruler of steel components before and after measurement tempering
Very little variable quantity, then the normal deformation amount for subtracting tempering itself and generating, so that it may the deflection for obtaining pre-treatment, according to preceding
The deflection of processing can judge whether pretreatment procedure deforms normally, to pointedly improve.Wherein, if tempering
Temperature is excessively high, and soaking time is too long, then deflection caused by tempering itself will be excessive and unstable, this can make deflection
It complicates, is not used to calculate the deflection of pre-treatment, and if tempering temperature is too low, soaking time is too short, then is unable to fully
The residual stress of pre-treatment accumulation is discharged, the deformation of generation is unobvious.The detection method can be used for quantifying the change of each manufacturing procedure
Shape amount, analysis speed is fast, if it is 1 day or so general, and cost is significantly reduced than Metallographic Analysis method.
The method of deflection d of the steel components through the pre-treatment is obtained in one of the embodiments, are as follows: will be closed
Key size b subtracts the normal deformation amount c of critical size a and the tempering.
The tempering temperature is 510 DEG C~550 DEG C in one of the embodiments, and the heating coefficient is 2~2.5 small
When/inch.
The pre-treatment includes blanking, forging, normalizing, roughing, finishing, quenched, infiltration in one of the embodiments,
One of carbon, nitridation and quenching are a variety of.
The pre-treatment includes blanking, forging, normalizing, roughing, quenched and finishing in one of the embodiments,.
It is further comprising the steps of in one of the embodiments:
The steel components through the tempering are post-processed；
The critical size e for measuring the steel components Jing Guo the post-processing, subtracts critical size a for critical size e
With the deflection d of the pre-treatment, the deflection f of the post-processing is obtained.
The post-processing includes quenched, carburizing, nitridation, quenching, welding, finishing, metal plate in one of the embodiments,
One of gold, punching press are a variety of.
The post-processing is nitrogen treatment, condition in one of the embodiments, are as follows: 530 DEG C of nitridations keep the temperature 15 hours.
The steel components are axis class, disk class, gear or box parts in one of the embodiments,.
The steel components are steel ring gear in one of the embodiments,.
Detailed description of the invention
Fig. 1 is the sectional view of the steel ring gear of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, below will to invention is more fully described, and give it is of the invention compared with
Good embodiment.But the invention can be realized in many different forms, however it is not limited to embodiment described herein.Phase
Instead, purpose of providing these embodiments is makes the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The detection method of the steel components manufacturing procedure deflection of one embodiment of the invention, includes the following steps S1~S4:
The critical size a for the steel components that S1, measurement are obtained through pre-treatment.
S2, the above-mentioned steel components obtained through pre-treatment are carried out to tempering, tempering temperature is 500 DEG C~580 DEG C, is returned
Fire processing soaking time be steel components effective dimensions and heating coefficient product, heating coefficient be 1.5~2.5 hours/
Inch (25.4mm).
S3, the critical size b for measuring the steel components through above-mentioned tempering.
S4, the normal deformation amount c according to critical size b, critical size a and above-mentioned tempering, obtain above-mentioned steel zero
Part the deflection d through the pre-treatment, normal deformation amount c≤0.01mm of above-mentioned tempering.Wherein, deflection d is corresponding
Be due to pre-treatment bring, but be tempering step release deformation.
Steel components are after multi-step process obtains finished product, it is possible that the excessive design that is unsatisfactory for of deflection is wanted
The problem of asking is unable to normal use and work so as to cause part, and it needs to be determined that being which road work in manufacturing industry production process
Sequence causes to deform, and deflection is how many.Which need to improve convenient for understanding process if part is entirely to make by oneself, to pass through
It improves and improves part quality；If part is external coordination, convenient for judging the responsibility of abnormal deformation.The deformation of steel components is mainly
Caused by residual stress, steel components all may cause residual stress in each manufacturing procedure, especially non-heat treated process,
But so that part is deformed due to that will not show or release immediately when the presence of residual stress has, but may be subsequent
Manufacturing procedure in gradually discharge.It is thus impossible to simply by the key for detecting each manufacturing procedure steel components before and after the processing
Deflection of the deflection of size as corresponding manufacturing procedure.Traditional deformation analysis method is Metallographic Analysis method, analysis knot
Fruit has many uncertain factors, and the manufacturing procedure for causing problem on deformation cannot be accurately positioned, and especially determines each manufacturing procedure duty
Ren Shi, cannot quantitatively can not accurate judgement responsibility, there are larger disputes.And Metallographic Analysis method analytical cycle is long, generally at 7 days
More than, complicated needs one month or more, it is unfavorable for the timely processing of problem, required expense is also relatively high.
Detection method of the invention is controlled specific by that will carry out tempering through the steel components that pre-treatment obtains
Tempering temperature and soaking time, the residual stress for accumulating steel components in pretreatment process steadily release, simultaneously
Deflection caused by tempering itself is smaller and stablizes.Then pass through the crucial ruler of steel components before and after measurement tempering
Very little variable quantity, then the normal deformation amount for subtracting tempering itself and generating, so that it may the deflection for obtaining pre-treatment, according to preceding
The deflection of processing can judge whether pretreatment procedure deforms normally, to pointedly improve.Wherein, if tempering
Temperature is excessively high, and soaking time is too long, then deflection caused by tempering itself will be excessive and unstable, this can make deflection
It complicates, is not used to calculate the deflection of pre-treatment, and if tempering temperature is too low, soaking time is too short, then is unable to fully
The residual stress of pre-treatment accumulation is discharged, the deformation of generation is unobvious.The detection method can be used for quantifying the change of each manufacturing procedure
Shape amount, analysis speed is fast, if it is 1 day or so general, and cost is significantly reduced than Metallographic Analysis method.
Specifically, the method for deflection d of the steel components through above-mentioned pre-treatment is obtained are as follows: critical size b is subtracted into key
The normal deformation amount c of size a and above-mentioned tempering.It is appreciated that d can be negative, positive number represents larger, negative generation
Table size reduces.
Specifically, above-mentioned critical size is the technical term of field of machining, refers to the ruler at the most stringent position of part requirements
It is very little, such as the internal diameter of ring gear.Above-mentioned effective dimensions refers to the full-size length on part minimum dimension direction, for example, rule
The cuboid that lattice are 10 × 20 × 40 inches, then its effective dimensions is 10 inches.If the section on the minimum dimension direction of part
Sizes etc., such as size in this direction are 5~10 inches, then select effective dimensions of 10 inches of the thickness as part,
And for long stick part, then using its diameter of section as effective dimensions.
In a specific example, tempering temperature is 510 DEG C~550 DEG C, and heating coefficient is 2~2.5 hours/inch.
In a specific example, pre-treatment includes blanking, forging, normalizing, roughing, finishing, quenched, carburizing, nitrogen
One of change and quenching are a variety of.It is appreciated that it is currently processed include multiple manufacturing procedures when, the deflection being calculated is
The overall deformation of multiple manufacturing procedure.
In a specific example, pre-treatment are as follows: blanking, forging, normalizing, roughing, quenched, finishing.
In a specific example, steel components are axis class, disk class, gear or box parts.
In a specific example, steel components are steel ring gear.
In a specific example, the further comprising the steps of S5 of detection method of steel components manufacturing procedure deflection~
S6:
S5, the steel components through above-mentioned tempering are post-processed.
The critical size e of S6, the steel components of measurement after post treatment, subtract critical size a and preceding place for critical size e
The deflection d of reason, the deflection f post-processed.It is appreciated that can also directly calculate post-processing after with tempering it
Deflection of the size difference afterwards as post-processing.
In this way, the total deformation of pre-treatment and post-processing can be obtained by the way that critical size e is subtracted critical size a, then subtract
It goes the deflection d of pre-treatment that the deflection f of post-processing can be obtained, need to only compare deflection d and the change of post-processing of pre-treatment
It is excessive can clearly to judge that the manufacturing procedure in pretreatment process results in steel components deflection by shape amount f, or place afterwards
It is excessive that manufacturing procedure during reason results in steel components deflection, in order to carry out specific aim improvement or duty goal.It can
To understand, this method is suitable for handling the problem of producing part in batches, generally to the part to easily go wrong, each time intentionally
It successively processes, the subsequent reproduction of qualification that front processes can thus find the problem in time, solve the problems, such as.
In a specific example, post-processing includes quenched, carburizing, nitridation, quenching, welding, finishing, metal plate, punching press
One of or it is a variety of.It is appreciated that the manufacturing procedure for including in pre-treatment and post-processing can be the same or different.
It in a specific example, post-processes as nitrogen treatment, condition are as follows: 530 DEG C of nitridations keep the temperature 15 hours.
The following are specific embodiments.
It is as shown in Figure 1 a kind of steel ring gear, critical size is internal diameter, and the design requirement of internal diameter is 241.263mm
~241.292mm, effective dimensions 50mm, normal manufacturing procedure include pre-treatment (blanking, forging, normalizing, roughing,
Quenched, finishing), then nitrogenize, nitridation parameter is 530 DEG C of nitridations, keeps the temperature 15 hours.When exception occurs in the ring gear finished product of production
When deformation, it is thus necessary to determine that be the problems in pretreatment process or the problems in nitridation process.Learn from else's experience what pre-treatment obtained first
1~No. 10 sample of ring gear, measures its internal diameter and is denoted as critical size a, then carries out tempering, tempering temperature to sample
It is 510 DEG C, tempering insulation time is 5 hours.Then the internal diameter for measuring the sample after tempering is denoted as crucial ruler
Critical size b is subtracted the normal deformation amount 0.007 of critical size a and tempering, obtains the pre-treatment of ring gear by very little b
Deflection d.Then sample is subjected to nitrogen treatment, the internal diameter after measuring nitrogen treatment is simultaneously denoted as critical size e, by critical size
E subtracts the deflection d of critical size a and pre-treatment, the deflection f of post-processing can be obtained, according to deflection d and deflection f
It can clearly be that pretreatment process causes biggish deformation or nitridation process causes biggish deformation, specifically such as 1 institute of table
Show.
Table 1
The normal deformation amount c of tempering is carried out and above-mentioned phase by taking 1~No. 20 sample of ring gear qualified product
Then same tempering measures the difference of the critical size before and after tempering, that is, can verify that the normal deformation of tempering
Measuring c average value is within 0.01, specifically as shown in table 2.
Table 2
Further, by taking 1~No. 20 sample of ring gear qualified product, progress tempering, tempering temperature is 580 DEG C,
Soaking time is 5 hours, then measures the difference of the critical size before and after tempering, that is, can verify that the normal change of tempering
Shape amount c average value is within 0.01, specifically as shown in table 3.
Table 3
Further, by taking 1~No. 20 sample of ring gear qualified product, progress tempering, tempering temperature is 600 DEG C,
Soaking time is 8 hours, then measures the difference of the critical size before and after tempering, specific as shown in table 4, it is seen that be tempered
When temperature is excessively high, soaking time is too long, the deflection of tempering itself is unstable and larger, some deformation is to be tempered
The abnormal deformation that journey generates.
Table 4
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of detection method of steel components manufacturing procedure deflection, which comprises the following steps:
Measure the critical size a of the steel components obtained through pre-treatment；
The steel components obtained through pre-treatment are subjected to tempering, the tempering temperature is 500 DEG C~580 DEG C, described
The soaking time of tempering is the effective dimensions of the steel components and the product of heating coefficient, and the heating coefficient is 1.5
~2.5 hours/inch；
Measure the critical size b of the steel components through the tempering；
According to the normal deformation amount c of critical size b, critical size a and the tempering, obtain described in the steel components warp
The deflection d of pre-treatment, normal deformation amount c≤0.01mm of the tempering.
2. detection method according to claim 1, which is characterized in that obtain change of the steel components through the pre-treatment
The method of shape amount d are as follows: critical size b is subtracted to the normal deformation amount c of critical size a and the tempering.
3. detection method according to claim 1, which is characterized in that the tempering temperature is 510 DEG C~550 DEG C, described
Heating coefficient is 2~2.5 hours/inch.
4. detection method according to claim 1, which is characterized in that the pre-treatment includes blanking, forging, normalizing, thick
One of processing, finishing, quenched, carburizing, nitridation and quenching are a variety of.
5. detection method according to claim 4, which is characterized in that the pre-treatment includes blanking, forging, normalizing, thick
Processing, quenched and finishing.
6. detection method according to claim 1, which is characterized in that further comprising the steps of:
The steel components through the tempering are post-processed；
The critical size e for measuring the steel components Jing Guo the post-processing, subtracts critical size a and institute for critical size e
The deflection d for stating pre-treatment obtains the deflection f of the post-processing.
7. detection method according to claim 6, which is characterized in that the post-processing includes quenched, carburizing, nitrogenizes, quenches
One of fire, welding, finishing, metal plate, punching press are a variety of.
8. detection method according to claim 7, which is characterized in that the post-processing is nitrogen treatment, condition are as follows: 530
DEG C nitridation, keep the temperature 15 hours.
9. described in any item detection methods according to claim 1~8, which is characterized in that the steel components are axis class, disk
Class, gear or box parts.
10. described in any item detection methods according to claim 1~8, which is characterized in that the steel components are steel internal tooth
Circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307437.2A CN109945823B (en) | 2019-04-17 | 2019-04-17 | Method for detecting deformation of steel part in machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307437.2A CN109945823B (en) | 2019-04-17 | 2019-04-17 | Method for detecting deformation of steel part in machining process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109945823A true CN109945823A (en) | 2019-06-28 |
| CN109945823B CN109945823B (en) | 2021-09-14 |
Family
ID=67014196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910307437.2A Active CN109945823B (en) | 2019-04-17 | 2019-04-17 | Method for detecting deformation of steel part in machining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109945823B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11104723A (en) * | 1997-10-06 | 1999-04-20 | Kawasaki Steel Corp | Rolling material elongation rate detecting device |
| CN102443689A (en) * | 2011-11-07 | 2012-05-09 | 内蒙古北方重工业集团有限公司 | Method for controlling large slewing support raceway quenching deformation |
| CN103540945A (en) * | 2013-10-21 | 2014-01-29 | 哈尔滨东安发动机（集团）有限公司 | Thin-walled part nitridation deformation control method |
| CN104328267A (en) * | 2014-12-02 | 2015-02-04 | 江阴吉爱倍万达精工有限公司 | Heat treatment process of large-diameter stainless steel bearing ring |
| CN106854686A (en) * | 2015-12-08 | 2017-06-16 | 上海新力动力设备研究所 | A kind of shaping methods of ultrahigh-strength steel thin-wall housing quenching distortion |
| CN106929658A (en) * | 2016-12-14 | 2017-07-07 | 常州天山重工机械有限公司 | A kind of tempering correction process of the quenched ring gear of thin-walled |
| JP2017172998A (en) * | 2016-03-18 | 2017-09-28 | 大同特殊鋼株式会社 | Non-contact type strain measuring device and cooling processing facility |
| CN107356622A (en) * | 2017-05-16 | 2017-11-17 | 沈阳透平机械股份有限公司 | A kind of distortion sample for the test of carburizing and quenching gear deflection |
| CN108148991A (en) * | 2016-12-06 | 2018-06-12 | 新昌县嘉德科技发展有限公司 | A kind of processing technology of axis pin |
| CN108251608A (en) * | 2018-02-28 | 2018-07-06 | 洛阳Lyc轴承有限公司 | A kind of high-temperature bearing steel bearings lasso shaping processing method |
| US20180292299A1 (en) * | 2014-01-13 | 2018-10-11 | Hubei University Of Technology | Method of critical displacement forecast based on the deformation failure mechanism of slope |
| CN109238871A (en) * | 2018-09-05 | 2019-01-18 | 西安近代化学研究所 | Explosive column axis radial deformation non-contact measurement apparatus under a kind of temperature loading environment |
| CN109252019A (en) * | 2018-11-13 | 2019-01-22 | 东莞市国森科精密工业有限公司 | A kind of heat treatment process of harmonic speed reducer flexible bearing Reducing distortion amount |
-
2019
- 2019-04-17 CN CN201910307437.2A patent/CN109945823B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11104723A (en) * | 1997-10-06 | 1999-04-20 | Kawasaki Steel Corp | Rolling material elongation rate detecting device |
| CN102443689A (en) * | 2011-11-07 | 2012-05-09 | 内蒙古北方重工业集团有限公司 | Method for controlling large slewing support raceway quenching deformation |
| CN103540945A (en) * | 2013-10-21 | 2014-01-29 | 哈尔滨东安发动机（集团）有限公司 | Thin-walled part nitridation deformation control method |
| US20180292299A1 (en) * | 2014-01-13 | 2018-10-11 | Hubei University Of Technology | Method of critical displacement forecast based on the deformation failure mechanism of slope |
| CN104328267A (en) * | 2014-12-02 | 2015-02-04 | 江阴吉爱倍万达精工有限公司 | Heat treatment process of large-diameter stainless steel bearing ring |
| CN106854686A (en) * | 2015-12-08 | 2017-06-16 | 上海新力动力设备研究所 | A kind of shaping methods of ultrahigh-strength steel thin-wall housing quenching distortion |
| JP2017172998A (en) * | 2016-03-18 | 2017-09-28 | 大同特殊鋼株式会社 | Non-contact type strain measuring device and cooling processing facility |
| CN108148991A (en) * | 2016-12-06 | 2018-06-12 | 新昌县嘉德科技发展有限公司 | A kind of processing technology of axis pin |
| CN106929658A (en) * | 2016-12-14 | 2017-07-07 | 常州天山重工机械有限公司 | A kind of tempering correction process of the quenched ring gear of thin-walled |
| CN107356622A (en) * | 2017-05-16 | 2017-11-17 | 沈阳透平机械股份有限公司 | A kind of distortion sample for the test of carburizing and quenching gear deflection |
| CN108251608A (en) * | 2018-02-28 | 2018-07-06 | 洛阳Lyc轴承有限公司 | A kind of high-temperature bearing steel bearings lasso shaping processing method |
| CN109238871A (en) * | 2018-09-05 | 2019-01-18 | 西安近代化学研究所 | Explosive column axis radial deformation non-contact measurement apparatus under a kind of temperature loading environment |
| CN109252019A (en) * | 2018-11-13 | 2019-01-22 | 东莞市国森科精密工业有限公司 | A kind of heat treatment process of harmonic speed reducer flexible bearing Reducing distortion amount |
Non-Patent Citations (3)
| Title |
|---|
| QINGGUO HAO 等: "Formability of quenching-partitioning-tempering martensitic steel", 《HEAT TREATMENT AND SURFACE ENGINEERING》 * |
| 刘昭 等: "变形和回火时间对F40微合金钢组织与性能的影响", 《金属热处理》 * |
| 吕立锋: "大变形温轧超细晶钢的制备及其组织与力学性能研究", 《中国博士学位论文全文数据库》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109945823B (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9783879B2 (en) | Nitrided steel member and manufacturing method thereof | |
| US9389155B1 (en) | Fatigue test specimen | |
| EP2554709B1 (en) | Bearing part inspection method | |
| CN108645706A (en) | A method of Metal Material Fatigue intensity is predicted by hardening strength and tensile strength | |
| CN114293102B (en) | Manufacturing method of 17CrNiMo6 forge piece | |
| CN109945823A (en) | The detection method of steel components manufacturing procedure deflection | |
| EP4169634A1 (en) | Seamless steel pipe and method for manufacturing same | |
| CN1996013B (en) | Method for detecting residual austenite amount and insufficient tempering of steel by using Rockwell and Rich hardness comparison method | |
| Baochun et al. | Analysis of the methods to calculate austenite static recrystallization volume fraction | |
| US20190003530A1 (en) | Bearing part and rolling bearing | |
| Chaudhary et al. | Application of Lean Six Sigma in manufacturing of precision tools and die: a case study | |
| CN107967400A (en) | A kind of Structural Metallic Fatigue experimental data processing and analysis method for reliability | |
| CN108929946B (en) | Method for evaluating ageing resistance of ultra-low carbon bake-hardening steel | |
| CN107421830A (en) | A kind of Vickers hardness for 8Cr4Mo4V steel and Rockwell hardness conversion method | |
| Cui et al. | Surface Performance Multiobjective Decision of a Cold Roll‐Beating Spline with the Entropy Weight Ideal Point Method | |
| CN105256242A (en) | Manufacturing method for forge piece blanks for marine oil exploitation equipment | |
| CN108118137B (en) | A kind of design method of large size, thin walled gear process bore dia | |
| Horn et al. | Identification of a process window for tailored carburization of sheet metals in hot stamping | |
| Thomason | First Paper: The Effect of Heat Treatment on the Ductility of Alloy Steel Wires in a Cold Heading Process | |
| Horn et al. | Investigation of diffusion behavior of carburized sheet metal in hot stamping | |
| CN115945616A (en) | Forming method for austenite-containing material alloy forging with internal structure meeting physicochemical test | |
| Friedrich et al. | Investigation of diffusion behavior of carburized sheet metal in hot stamping | |
| CN108950425A (en) | A kind of high tensile metal material for golf club head position | |
| JP5796815B2 (en) | Nitriding apparatus and cross-sectional hardness distribution prediction system | |
| Nietsch et al. | Bonding experiments at elevated temperatures: the effect of the sample storage time on the bond strength of metals |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |