CN109338275A - A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel - Google Patents
A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel Download PDFInfo
- Publication number
- CN109338275A CN109338275A CN201811327857.9A CN201811327857A CN109338275A CN 109338275 A CN109338275 A CN 109338275A CN 201811327857 A CN201811327857 A CN 201811327857A CN 109338275 A CN109338275 A CN 109338275A
- Authority
- CN
- China
- Prior art keywords
- size
- carburizing
- cylinder body
- small
- 18crnimo7
- 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
- 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
- C23C8/06—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 using gases
- C23C8/08—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 using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- 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
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/607—Molten salts
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to heat treatment operation technical field, especially a kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel successively carries out " carburizing-high tempering-quenching-lonneal " to the middle-size and small-size cylinder body of 18CrNiMo7-6 steel；Wherein, carburizing process first uses stage heating mode, i.e. " preheating-samming-heating-samming-heating ", then seeps 30h by force, and strong carburizing potential 1.15% spreads 20h, spreads carbon potential 0.75%；Quenching process is using multistage quenching.This process optimization temperature, carbon potential and soaking time in cylinder body carburizing each stage, realizes better carburizing effect.It is quenched using multistage, possesses good thermal stability and chemical stability；Occupied area is small, high recycling rate, and pollution is small, is more suitble to big part or batch production；The deflection of workpiece can greatly be reduced, eliminate workpiece residual stress, improve plasticity and toughness and workpiece strength, strong operability provides biggish adjustment space by the regulation of hardening heat and mixing speed for quenching.
Description
Technical field
The present invention relates to heat treatment operation technical field, specific field is a kind of cylinder body entirety carburizing and quenching work
Skill.
Background technique
Currently, existing cylinder body entirety carburizing and quenching has the following problems:
(1) infiltration layer is uneven, and carburizing and quenching effect is undesirable, and cylinder body class workpiece is due to requiring whole carburizing, by itself
The limitation of Workpiece structure and itself material, carburizing process poor controllability cause infiltration layer uneven, and harden ability is poor, and quenching effect is not
It is ideal.
(2) easily-deformable, cylinder body class workpiece entirety carburizing and quenching is being seeped because its volume is big, density is high, workpiece thickness is different
In carbon quenching process, it is easy to influence the heating and cooling rate of workpiece, deflection is caused to increase.
Summary of the invention
The purpose of the present invention is to provide a kind of middle-size and small-size cylinder body carburizing multistage quenching technicals of 18CrNiMo7-6 steel, lead to
Change common cylinder body material at present is crossed, optimizes heat treatment process, solves the main problem of current cylinder body entirety carburizing and quenching:
One, infiltration layer is uneven, and cylinder body class workpiece usually requires that whole carburizing and quenching, is limited to material-structure influence, carburizing and quenching effect
It is not easy to control；Two, easily-deformable, cylinder body class workpiece volume itself is big, and density is high, and thickness great disparity causes uneven heating even, deflection
Greatly.
To achieve the above object, the invention provides the following technical scheme:
A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel, it is middle-size and small-size to 18CrNiMo7-6 steel
Cylinder body successively carries out " carburizing-high tempering-quenching-lonneal "；Wherein, carburizing process first uses stage heating mode,
That is " preheating-samming-heating-samming-heating " then seeps by force 30h, and strong carburizing potential 1.15% spreads 20h, spreads carbon potential
0.75%；Quenching process is followed successively by salt bath, air-cooled and water cooling using multistage quenching.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein the carburizing
For journey in stage heating, first time samming temperature is 650 DEG C, time 60min；Second of samming temperature is 800 DEG C, the time
For 60min；Strong seep with the temperature of diffusion process is 930 DEG C.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein first furnace after diffusion
It is cooled to 820 DEG C, keeps samming 60min；Then slow cooling is come out of the stove to 350 DEG C, air-cooled.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein when carburizing, have
Effect hardened-depth is 2.8-3.2mm.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein high tempering
Temperature is 660 DEG C, send nitrogen to be tempered, flow 10m3/ h, time 180min；Then it is cooled to 400 DEG C fastly, comes out of the stove, it is air-cooled.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein the salt bath is adopted
It is 55% sodium nitrite and 45% potassium nitrate with quality accounting.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein when quenching, first
650 DEG C, samming 120min are preheated to, then heats to 830 DEG C, keeps 240min；Then enter salt bath, 170 DEG C of salt temperature, when
Between be 60min.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein when salt bath, stir
Motor play 5min up and down is mixed, 40min is stirred fastly, stirs 20min slowly；Wherein, upper and lower play is carried out simultaneously with stirring fastly.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein go out after salt bath
Furnace, air-cooled to 100 DEG C are washed to 40 DEG C of end face, upper and lower play 2min into 40 DEG C of sinks.
The middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel of the present invention, wherein lonneal
Temperature is 160 DEG C, and then time 600min comes out of the stove, air-cooled.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention employs 18CrNiMo7-6 to replace common 20CrMo cylinder block material, compared to 20CrMo,
The essential element content of 18CrNiMo7-6: C:0.150-0.210%, Cr:0.155-0.180%, Ni:1.40-1.70% are
A kind of Germany's production domesticization low-carbon alloy steel, has high-intensitive, high tenacity and high-hardenability.Its Ms point is 400 DEG C or so, Ac1:
740 DEG C, Ac3: 820 DEG C, when workpiece carbonization rear surface concentration of carbon reaches 0.7% or so, Ms is 120 DEG C or so, can be in 160-
The transformation of core tissue is realized in salt bath quenching within the scope of 180 DEG C, realizes transformation of the overcooling austenite to martensite in the air-cooled stage,
The control of retained austenite is realized in water cooling stage.
(2) present invention optimizes the temperature in cylinder body carburizing each stage, carbon potential and soaking times, realize better carburizing effect
Fruit.
(3) present invention replaces common oil bath to quench using multistage quenching (salt bath+air-cooled+water cooling), compared to oil bath
Quenching, multistage quenching possess good thermal stability and chemical stability, recycling rate of waterused by the combination of a variety of hardening medias
Height pollutes the workpiece of small, combination diversity, the suitable biggish part of volume or mass production；Workpiece can greatly be reduced
Deflection, eliminate workpiece residual stress, improve plasticity and toughness and workpiece strength, strong operability, while being situated between according to multistage quenching
The difference of matter cooling characteristics provides biggish adjustment space by the regulation of hardening heat and mixing speed for quenching.
Detailed description of the invention
Fig. 1 is " carburizing-high tempering " process curve during the cylinder body carburizing and quenching of present invention process；
Fig. 2 is " quenching-lonneal " process curve during the cylinder body carburizing and quenching of present invention process；
Fig. 3 is the surface layer metallographic structure (20 μm) for the cylinder body that present invention process obtains；
Fig. 4 is the core metallographic structure (20 μm) for the cylinder body that present invention process obtains；
Fig. 5 is the hardness gradient curve for the cylinder body that present invention process obtains.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2:
A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel, it is middle-size and small-size to 18CrNiMo7-6 steel
Cylinder body successively carries out " carburizing-high tempering-quenching-lonneal ".
Wherein, carburizing process first uses stage heating mode, i.e. " preheating-samming-heating-samming-heating ", for the first time
Samming temperature is 650 DEG C, time 60min；Second of samming temperature is 800 DEG C, time 60min；It can using samming twice
Greatly reduce workpiece deflection；And found by many experiments, if being adjusted to other samming temperature parameters, will easily cause
The effect of deflection out of hand, or even increase deformation.So that workpiece heating is more uniform, be conducive to the control of deformation.Then
Strong to seep 30h, strong carburizing potential 1.15% spreads 20h, spreads carbon potential 0.75%, not only can guarantee effective hardened-depth, but also can keep away
Exempt from the appearance of carbide surface；Grope to find by many experiments, if improving carburizing time, carbon potential on this basis, can lead
Cause layer depth beyond requirement, carbide accumulation；And reduce carburizing time, carbon potential, it will cause layer depth insufficient, reduce carburizing efficiency.
Under this technological parameter, when carburizing, the Available Hardened Depth 2.8-3.2mm, strong seep with the temperature of diffusion process is 930 DEG C.
It is first furnace-cooled to 820 DEG C after diffusion, keeps samming 60min；Then slow cooling is come out of the stove to 350 DEG C, air-cooled.
Wherein, the temperature of high tempering is 660 DEG C, send nitrogen to be tempered, flow 10m3/ h, time 180min；Then
It is cooled to 400 DEG C fastly, comes out of the stove, it is air-cooled.
Quenching process is followed successively by salt bath, air-cooled and water cooling using multistage quenching.Salt bath use quality accounting for 55% Asia
Sodium nitrate and 45% potassium nitrate, grope to find by many experiments, if using other ratios instead, will seriously affect hardening media
Cooling rate, and too fast cooling rate will lead to workpiece cracking, be unfavorable for the conversion of tissue slowly excessively.When quenching, first preheat
To 650 DEG C, samming 120min, 830 DEG C are then heated to, keeps 240min；Then enter salt bath, 170 DEG C of salt temperature, the time is
60min the experiment has found that such as adjust preheating temperature on the basis of this technological parameter, the time will be unfavorable for control deformation, adjustment samming
Temperature, that the time will lead to quenching process tissue austenitizing is incomplete, using the temperature of this technique salt bath, time, Ke Yishi
The abundant transformation of quenching structure inside and outside existing multistage quenching control workpiece.When salt bath, play 5min, is stirred fastly above and below stirring motor
40min stirs 20min slowly；Wherein, upper and lower play is carried out simultaneously with stirring fastly.It comes out of the stove after salt bath, air-cooled to 100 DEG C, into 40 DEG C of water
Slot is washed to 40 DEG C of end face, upper and lower play 2min；Multistage quenching may be implemented using different temperature gradients, control inside and outside workpiece
The abundant transformation of quenching structure.By the way of multistage quenching, the cylinder body of 18CrNiMo7-6 material can be made to obtain better core
And textura epidermoidea.
Wherein, the temperature of lonneal is 160 DEG C, and then time 600min comes out of the stove, air-cooled.
In entire technical process, by the analysis detection with furnace sample, to monitor the effective hardness layer hardness ladder of workpiece
Distribution, surface hardness and the core hardness of degree and metallographic structure.
(1) tissue
Textura epidermoidea is that fine acicular martensite, retained austenite and granular carbide form, as shown in Figure 3.
Core set is woven to lath martensite and ferrite composition free on a small quantity, as shown in Figure 4.
Core and textura epidermoidea are all satisfied the organizational requirements of the ME grade of ISO6336-5-2016.
(2) hardness gradient
With furnace sample interval 120 ° of selections, 3 positions, sample the Available Hardened Depth is detected, three positions are corresponding effectively
Hardened-depth and the distribution of corresponding hardness gradient are as shown in Figure 5:
Layer depth are as follows: 3.04mm, 3.05mm, 3.07mm meet technique the Available Hardened Depth requirement.
(3) it deforms
The single weight of cylinder body is larger, individually about 800kg, and thickness great disparity, by the rank that preheating insulation is added in process
Section reduces its rate of heat addition, reduces workpiece caused by uneven heating and deforms.Cylinder body heat-treatment distortion is mainly with cylinder inner bore ellipse
Spending is main monitoring point, and under different technology conditions, the comparison of cylinder inner bore ovality is as shown in table 1:
The comparison of 1 inner hole ovality of table
| Technique | Oil quenching is not preheated | Preheat oil quenching | Preheating multistage quenching of the present invention |
| Cylinder inner bore ovality/‰ | 0.9-1.3 | 0.6-1.0 | 0.3-0.7 |
Never the comparison for preheating oil quenching, preheating oil quenching and preheating multistage quenching rear-bank rotor housing inner hole ovality can be seen that cylinder
Body heat treated deformation be effectively improved, realize the optimization aim of technique, the deformation after reducing heat treatment of workpieces
Amount.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel, it is characterised in that: to 18CrNiMo7-6
The middle-size and small-size cylinder body of steel successively carries out " carburizing-high tempering-quenching-lonneal "；Wherein, carburizing process first uses stage
Heating mode, i.e. " preheating-samming-heating-samming-heating ", then seep by force 30h, and strong carburizing potential 1.15% spreads 20h, diffusion
Carbon potential 0.75%；Quenching process is followed successively by salt bath, air-cooled and water cooling using multistage quenching.
2. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: for the carburizing process in stage heating, first time samming temperature is 650 DEG C, time 60min；Second of samming temperature
Degree is 800 DEG C, time 60min；Strong seep with the temperature of diffusion process is 930 DEG C.
3. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: it is first furnace-cooled to 820 DEG C after diffusion, keeps samming 60min；Then slow cooling is come out of the stove to 350 DEG C, air-cooled.
4. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: when carburizing, the Available Hardened Depth 2.8-3.2mm.
5. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: the temperature of high tempering is 660 DEG C, send nitrogen to be tempered, flow 10m3/ h, time 180min；Then it is cooled to 400 fastly
DEG C, it comes out of the stove, it is air-cooled.
6. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: the salt bath uses quality accounting for 55% sodium nitrite and 45% potassium nitrate.
7. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: when quenching, 650 DEG C, samming 120min are first preheated to, then heats to 830 DEG C, keeps 240min；Then enter salt bath, salt bath
170 DEG C of temperature, time 60min.
8. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: when salt bath, play 5min, stirs 40min fastly, stirs 20min slowly above and below stirring motor；Wherein, upper and lower play and stir fastly simultaneously into
Row.
9. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: it comes out of the stove after salt bath, air-cooled to 100 DEG C, is washed to 40 DEG C of end face, upper and lower play 2min into 40 DEG C of sinks.
10. the middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel according to claim 1, feature exist
In: the temperature of lonneal is 160 DEG C, and then time 600min comes out of the stove, air-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811327857.9A CN109338275A (en) | 2018-11-09 | 2018-11-09 | A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811327857.9A CN109338275A (en) | 2018-11-09 | 2018-11-09 | A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109338275A true CN109338275A (en) | 2019-02-15 |
Family
ID=65312744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811327857.9A Pending CN109338275A (en) | 2018-11-09 | 2018-11-09 | A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109338275A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN110484858A (en) * | 2019-08-29 | 2019-11-22 | 汉德车桥(株洲)齿轮有限公司 | A method of eliminating pinion steel mixed crystal |
| CN113549866A (en) * | 2021-07-22 | 2021-10-26 | 湖南南方宇航高精传动有限公司 | Carburizing and quenching process for planet wheel of gear box roller path of wind generating set |
| CN114774837A (en) * | 2022-04-28 | 2022-07-22 | 南京高精齿轮集团有限公司 | Carburizing and quenching process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
| CN105483603A (en) * | 2015-12-10 | 2016-04-13 | 常州天山重工机械有限公司 | Thermal treatment process for hardness gradient of shallow deep carburized gear |
| CN108220578A (en) * | 2017-12-22 | 2018-06-29 | 常州天山重工机械有限公司 | The judgment method of large-scale 18CrNiMo7-6 gear wheel carburizations part salt bath quenching time |
-
2018
- 2018-11-09 CN CN201811327857.9A patent/CN109338275A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776471A (en) * | 2012-07-10 | 2012-11-14 | 镇江中船设备有限公司 | Carburizing quenching technology for low-carbon alloy steel parts |
| CN105483603A (en) * | 2015-12-10 | 2016-04-13 | 常州天山重工机械有限公司 | Thermal treatment process for hardness gradient of shallow deep carburized gear |
| CN108220578A (en) * | 2017-12-22 | 2018-06-29 | 常州天山重工机械有限公司 | The judgment method of large-scale 18CrNiMo7-6 gear wheel carburizations part salt bath quenching time |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343994A (en) * | 2019-08-08 | 2019-10-18 | 常州天山重工机械有限公司 | A kind of micro- aberration control method of flywheel ring gear carburizing and quenching |
| CN110343994B (en) * | 2019-08-08 | 2022-01-11 | 常州天山重工机械有限公司 | Carburizing and quenching micro-distortion control method for flywheel gear ring |
| CN110484858A (en) * | 2019-08-29 | 2019-11-22 | 汉德车桥(株洲)齿轮有限公司 | A method of eliminating pinion steel mixed crystal |
| CN110484858B (en) * | 2019-08-29 | 2021-08-20 | 汉德车桥(株洲)齿轮有限公司 | Method for eliminating mixed crystal of gear steel |
| CN113549866A (en) * | 2021-07-22 | 2021-10-26 | 湖南南方宇航高精传动有限公司 | Carburizing and quenching process for planet wheel of gear box roller path of wind generating set |
| CN113549866B (en) * | 2021-07-22 | 2023-04-14 | 湖南南方宇航高精传动有限公司 | Carburizing and quenching process for planet wheel of gear box roller path of wind generating set |
| CN114774837A (en) * | 2022-04-28 | 2022-07-22 | 南京高精齿轮集团有限公司 | Carburizing and quenching process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109338275A (en) | A kind of middle-size and small-size cylinder body carburizing multistage quenching technical of 18CrNiMo7-6 steel | |
| CN111394661B (en) | Preparation process of low-alloy high-strength-toughness martensite duplex phase steel | |
| CN112941274B (en) | Method for improving high-carbon chromium steel strength and toughness and application thereof | |
| CN110257695B (en) | Copper-containing CADI (copper-activated carbon dioxide) wear-resistant material and heat treatment process thereof | |
| CN108315652B (en) | Inexpensive high-hardenability HB450 grades of cut deal wear-resisting steel plates and manufacturing method | |
| CN108342680A (en) | The carbo-nitriding method of thin wall steel pieces | |
| CN102443740B (en) | Alloy steel nitride and manufacture method thereof | |
| CN110042324B (en) | Container corner fitting production process | |
| CN109680127B (en) | Quenching and tempering process for large-size medium-carbon alloy structural round steel | |
| CN111733312A (en) | Heat treatment process for improving comprehensive mechanical property of H13 steel | |
| CN101619412A (en) | Intrinsic non-net secondary cementite steel and application method thereof | |
| CN113462856B (en) | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor | |
| CN108330395A (en) | A kind of heat treatment process of low-alloy high-strength and high-ductility steel | |
| CN112281053B (en) | SiMnCrNiMo low-carbon martensitic steel, drilling machine hoisting ring and manufacturing method thereof | |
| CN115109899A (en) | Heat treatment process of low-carbon alloy steel material | |
| CN106011398A (en) | Heat treatment process for low-alloy abrasion-resistant steel | |
| CN114657334A (en) | Annealing process of mining circular chain steel 23MnNiMoCr54 with both structure control and hardness control | |
| CN111778381A (en) | Heat treatment method for improving plasticity and low-temperature impact toughness of C-grade steel | |
| CN111876663A (en) | Alloy structural steel plate for knitted panel and manufacturing method thereof | |
| CN110735105A (en) | method for prolonging contact fatigue life of high-carbon bearing steel | |
| CN118441127B (en) | High-carbon chromium bearing steel and heat treatment method thereof | |
| CN113215376B (en) | Loader bucket tooth and heat treatment method thereof | |
| CN117660734B (en) | Cold work die steel surface strengthening treatment method and cold work die steel | |
| CN1380434A (en) | High fatigue property spring steel for railway spring strip | |
| CN110396641A (en) | A kind of good Micro Alloying HB360 grades of cut deal abrasion-resistant stees of harden ability and its production method |
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: 20190215 |