CN107419164A - A kind of casting technique of clutch compressing disc - Google Patents
A kind of casting technique of clutch compressing disc Download PDFInfo
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- CN107419164A CN107419164A CN201710688350.5A CN201710688350A CN107419164A CN 107419164 A CN107419164 A CN 107419164A CN 201710688350 A CN201710688350 A CN 201710688350A CN 107419164 A CN107419164 A CN 107419164A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- 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
- C21D5/00—Heat treatments of cast-iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the Casting Technology field of platen, and in particular to a kind of casting technique of clutch compressing disc, including prepared by molten iron, molten iron is rested and moulding by casting.The present invention has advantages below compared with prior art：Casting content of pearlite in alloy is improved in the present invention, casting metallographic structure and mechanical property is set to meet to require to carry out Non-Destructive Testing to casting, the examination requirements of radiographic inspection I levels, ultrasonic inspection I levels and magnetic powder inspection I levels is met simultaneously, clutch compressing disc is prepared using above-mentioned casting method and casting device, the utilization rate of its metal improves more than 40%, and operating efficiency improves 60% or so.
Description
Technical field
The invention belongs to the Casting Technology field of platen, and in particular to a kind of casting technique of clutch compressing disc.
Background technology
Clutch compressing disc is an important feature on clutch, and ride safety of automobile is played an important role, prior art
Cast member is generally obtained by the method for casting, geomery is very close with part, reduces cutting output, belongs to no machining,
But the problem of casting quality is unstable simultaneously be present, in order to ensure the performance requirement of automobile platen, the change to automobile platen casting
Study point, metallographic structure, graphite form, tensile strength, hardness etc. have more strict requirements, due to casting in actual production
The intensity containing flake graphite, plasticity, toughness are almost nil in part, destroy the continuity of matrix, and it is effective to reduce matrix stress
Area, and stress concentration is formed at graphite flake tip, material is formed brittle fracture, the quantity of graphite flake is bigger, size
Thicker, distribution is more uneven, and the tensile strength and plasticity of cast iron are lower, and wherein c-type graphite is acted on most isolating for matrix
Greatly, secondly isolate effect of the D+E types graphite to matrix is also big, therefore, C, D, E type content of graphite how is reduced, into founder
The technical problem studied is needed in skill.
The content of the invention
The purpose of the present invention is to be directed to the problem of existing, there is provided a kind of casting technique of clutch compressing disc.
The present invention is achieved by the following technical solutions：A kind of casting technique of clutch compressing disc, comprises the following steps：
（1）By weight, molten steel will be fused into the steel scrap of 12-16 parts and 2-3 parts ferromanganese input middle frequency furnace, treats medium frequency electric
When temperature in stove rises to 1100-1200 DEG C, then 42-46 parts pig iron, 30-34 parts steel scrap and 13-15 part foundry returns are put into, then
Deslagging, 1.4-2.2 parts carborundum, the molybdenum of 2.5-3.4 parts, the tin of 0.4-0.7 parts are added after deslagging, and melting forms molten iron；
（2）Now, sampling analysis in the molten iron out of middle frequency furnace, adds material, treats that the temperature in middle frequency furnace rises to 1350
DEG C when iron removaling, be blown into carburant with being passed through the nitrogen that pressure is 350-400kPa in the molten iron after iron removaling；
Wherein, the content of carburant is the 0.08-0.13% of steel scrap weight, and the particle diameter of carburant is less than 200nm；
（3）Molten iron in stove is warming up to 1450-1470 DEG C, is incubated, rests, molten iron chemical composition is reached uniform state；
（4）Inovulant is added during cast, casting is taken out after 10 minutes, is heat-treated, treats that it is cooled to room temperature blast cleaning, machinery adds
Work, be put in storage, produce after inspection.
As further improvement of these options, sulfur content is 0.025-0.05wt%, contained in the molten iron after the iron removaling
Amount of copper is 0.02-0.05wt%, manganese content 0.58-0.72wt%, amount containing molybdenum are 0.17-0.34wt%, silicon content 2.6-
2.8wt%, phosphorus content 4.25-4.75wt%, stanniferous amount are 0.035-0.072wt%, barium content 0.008-0.016wt%, remaining
Measure as inevitable impurity and iron.
As further improvement of these options, after the completion of the carburant is blown into, continue to be passed through the nitrogen 25-30 seconds；
The temperature of the nitrogen is not less than 50 DEG C.
As further improvement of these options, each group of the carburant is divided into：Nitrogen content be 0.04-0.05wt%,
Sulfur content is 0.28-0.32wt%, carbon content 96-97wt%, surplus are impurity；Inovulant is Si-Sr.
As further improvement of these options, the process of the heat treatment is：In the condition that temperature is 500-550 DEG C
Lower insulation 1-1.5 hours, 850-900 DEG C is then heated to, is incubated 25-30 minutes, be cooled to 600-650 DEG C of insulation 2-3 hour,
Fast cooling is incubated 25-30 minutes to after 240-280 DEG C.
The addition opportunity of carburant is adjusted, ensure that in the pig iron crystal type core not by serious scaling loss, is the liquid of later stage molten iron
Face is in below electric furnace induction coil, and molten iron increases stirring dynamics in heating；The content of each element is controlled, ensures mechanical strength
While improve elongation percentage.
The present invention has advantages below compared with prior art：
The generation of A type graphite is effectively facilitated in the present invention by the proportional quantity of sulphur and molybdenum, while deposits into the formation of pearlite；Tin
Proportional quantity can effectively facilitate the formation of pearlite, and adding the purpose of inovulant makes increase Eutectic Cell Number and promote fine pearlite
Formation；Automobile platen casting matches and utilized nitrogen addition carburant, the forming core bar of metal bath using the chemical composition
Part, while shock vibration effect and the strong relative motion of melt of the curing powder to dendrite in melt, change nucleus and are formed
Growth conditions afterwards, so as to more crystal grain thinning, while protect aluminium alloy from being oxidized in turbulent flow or disturbance or inhaling hydrogen, add
Add inovulant, eliminate D type graphite structures in casting, and can improves casting content of pearlite in alloy, makes casting metallographic structure and mechanics
Performance meets to require to carry out Non-Destructive Testing to casting, while meets radiographic inspection I levels, ultrasonic inspection I levels and magnetic powder inspection I levels
Examination requirements, clutch compressing disc is prepared using above-mentioned casting method and casting device, the utilization rate of its metal improve 40% with
On, operating efficiency improves 60% or so.
Embodiment
Embodiment 1
A kind of casting technique of clutch compressing disc, comprises the following steps：
（1）By weight, molten steel will be fused into 14 parts of steel scrap and 3 parts of ferromanganese input middle frequency furnaces, treated in middle frequency furnace
Temperature when rising to 1150 DEG C, then put into 44 parts of pig iron, 32 parts of steel scraps and 14 parts of foundry returns, then deslagging, 1.8 added after deslagging
Part carborundum, 2.9 parts of molybdenum, 0.6 part of tin, melting form molten iron；
Wherein, in the molten iron after the iron removaling sulfur content be 0.037wt%, copper content 0.04wt%, manganese content 0.65wt%,
Amount containing molybdenum is 0.26wt%, silicon content 2.7wt%, phosphorus content 4.5wt%, stanniferous amount are 0.052wt%, barium content is
0.012wt%, surplus are inevitable impurity and iron；
（2）Now, sampling analysis in the molten iron out of middle frequency furnace, adds material, treats that the temperature in middle frequency furnace rises to 1350
DEG C when iron removaling, be blown into carburant with being passed through the nitrogen that pressure is 350-400kPa in the molten iron after iron removaling；
Wherein, the content of carburant is the 0.1% of steel scrap weight, and the particle diameter of carburant is less than 200nm, and each group of carburant is divided into：
Nitrogen content is 0.045wt%, sulfur content 0.3wt%, carbon content 96.5wt%, surplus are impurity；
After the completion of the carburant is blown into, continue to be passed through nitrogen 28 seconds；The temperature of the nitrogen is not less than 50 DEG C；
（3）Molten iron in stove is warming up to 1460 DEG C, is incubated, rests, molten iron chemical composition is reached uniform state；
（4）During cast add Si-Sr inovulants, casting is taken out after 10 minutes, be heat-treated, treat its be cooled to room temperature blast cleaning,
Machining, is put in storage after inspection, produces；
Wherein, the process of the heat treatment is：1.5 hours are incubated under conditions of being 520 DEG C in temperature, then heats to 880 DEG C,
Insulation 28 minutes, it is cooled to 630 DEG C and is incubated 2 hours, fast cooling is to being incubated 30 minutes after 260 DEG C.
Embodiment 2
A kind of casting technique of clutch compressing disc, comprises the following steps：
（1）By weight, molten steel will be fused into 12 parts of steel scrap and 3 parts of ferromanganese input middle frequency furnaces, treated in middle frequency furnace
Temperature when rising to 1200 DEG C, then put into 46 parts of pig iron, 30 parts of steel scraps and 15 parts of foundry returns, then deslagging, 1.4 added after deslagging
Part carborundum, 3.4 parts of molybdenum, 0.7 part of tin, melting form molten iron；
Wherein, in the molten iron after the iron removaling sulfur content be 0.025wt%, copper content 0.02wt%, manganese content 0.72wt%,
Amount containing molybdenum is 0.34wt%, silicon content 2.8wt%, phosphorus content 4.75wt%, stanniferous amount are 0.72wt%, barium content is
0.008wt%, surplus are inevitable impurity and iron；
（2）Now, sampling analysis in the molten iron out of middle frequency furnace, adds material, treats that the temperature in middle frequency furnace rises to 1350
DEG C when iron removaling, be blown into carburant with being passed through the nitrogen that pressure is 350kPa in the molten iron after iron removaling；
Wherein, the content of carburant is the 0.13% of steel scrap weight, and the particle diameter of carburant is less than 200nm, each component of carburant
For：Nitrogen content is 0.04wt%, sulfur content 0.32wt%, carbon content 96wt%, surplus are impurity；
After the completion of the carburant is blown into, continue to be passed through nitrogen 25 seconds；The temperature of the nitrogen is not less than 50 DEG C；
（3）Molten iron in stove is warming up to 1470 DEG C, is incubated, rests, molten iron chemical composition is reached uniform state；
（4）During cast add Si-Sr inovulants, casting is taken out after 10 minutes, be heat-treated, treat its be cooled to room temperature blast cleaning,
Machining, is put in storage after inspection, produces；
Wherein, the process of the heat treatment is：1 hour is incubated under conditions of being 500 DEG C in temperature, 900 DEG C is then heated to, protects
Temperature 25 minutes, it is cooled to 650 DEG C and is incubated 2 hours, fast cooling is to being incubated 30 minutes after 240 DEG C.
Embodiment 3
A kind of casting technique of clutch compressing disc, comprises the following steps：
（1）By weight, molten steel will be fused into 16 parts of steel scrap and 2 parts of ferromanganese input middle frequency furnaces, treated in middle frequency furnace
Temperature when rising to 1100 DEG C, then put into 42 parts of pig iron, 34 parts of steel scraps and 13 parts of foundry returns, then deslagging, 2.2 added after deslagging
Part carborundum, 2.5 parts of molybdenum, 0.4 part of tin, melting form molten iron；
Wherein, sulfur content is 0.05wt%, copper content 0.05wt%, manganese content 0.58wt%, contained in the molten iron after the iron removaling
Molybdenum amount is 0.17wt%, silicon content 2.6wt%, phosphorus content 4.25wt%, stanniferous amount are 0.035wt%, barium content is
0.016wt%, surplus are inevitable impurity and iron；
（2）Now, sampling analysis in the molten iron out of middle frequency furnace, adds material, treats that the temperature in middle frequency furnace rises to 1350
DEG C when iron removaling, be blown into carburant with being passed through the nitrogen that pressure is 400kPa in the molten iron after iron removaling；
Wherein, the content of carburant is the 0.08% of steel scrap weight, and the particle diameter of carburant is less than 200nm, each component of carburant
For：Nitrogen content is 0.05wt%, sulfur content 0.28wt%, carbon content 97wt%, surplus are impurity；
After the completion of the carburant is blown into, continue to be passed through nitrogen 30 seconds；The temperature of the nitrogen is not less than 50 DEG C；
（3）Molten iron in stove is warming up to 1450 DEG C, is incubated, rests, molten iron chemical composition is reached uniform state；
（4）During cast add Si-Sr inovulants, casting is taken out after 10 minutes, be heat-treated, treat its be cooled to room temperature blast cleaning,
Machining, is put in storage after inspection, produces；
Wherein, the process of the heat treatment is：1-1.5 hours are incubated under conditions of being 550 DEG C in temperature, then heat to 850
DEG C, 30 minutes are incubated, 600 DEG C is cooled to and is incubated 3 hours, fast cooling is to being incubated 25 minutes after 280 DEG C.
Control group 1 is set, tin in embodiment 1 removed, remaining content is constant；Control group 2 is set, by institute in embodiment 1
State nitrogen and be blown into carburant and replace with and be directly added into carburant, remaining content is constant；Control group 2 is set, described in embodiment 1
Nitrogen is blown into carburant and removed, and is step（1）Temperature adds carburant when rising to 1100-1200 DEG C, and remaining content is constant；Set
Control group 4, after the completion of carburant is blown into embodiment 1, the step of continuing to be passed through nitrogen, is removed, and remaining content is constant；Set
Control group 5, heat treatment process in embodiment 1 is removed, remaining content is constant；
Each group mechanical property is detected, obtains following result：
Table 1
| Group | Tensile strength（MPa） | Yield strength（MPa） | Elongation percentage | Body hardness（HB） |
| Embodiment 1 | 574 | 380 | 17 | 239 |
| Embodiment 2 | 573 | 382 | 16 | 237 |
| Embodiment 3 | 576 | 379 | 16 | 238 |
| Control group 1 | 562 | 345 | 14 | 207 |
| Control group 2 | 547 | 362 | 13 | 224 |
| Control group 3 | 556 | 357 | 15 | 215 |
| Control group 4 | 561 | 364 | 13 | 223 |
| Control group 5 | 539 | 356 | 14 | 216 |
The casting mechanical strength of gained clutch compressing disc can reach requirement in the present invention, strong compared to existing high strength casting tension
Degree and yield strength have certain decline, but the rise of its elongation percentage is obvious, and manufacturing cost reduces, and practicality is stronger.
Claims (6)
1. a kind of casting technique of clutch compressing disc, it is characterised in that comprise the following steps：
（1）By weight, molten steel will be fused into the steel scrap of 12-16 parts and 2-3 parts ferromanganese input middle frequency furnace, treats medium frequency electric
When temperature in stove rises to 1100-1200 DEG C, then 42-46 parts pig iron, 30-34 parts steel scrap and 13-15 part foundry returns are put into, then
Deslagging, 1.4-2.2 parts carborundum, the molybdenum of 2.5-3.4 parts, the tin of 0.4-0.7 parts are added after deslagging, and melting forms molten iron；
（2）Now, sampling analysis in the molten iron out of middle frequency furnace, adds material, treats that the temperature in middle frequency furnace rises to 1350
DEG C when iron removaling, be blown into carburant with being passed through the nitrogen that pressure is 350-400kPa in the molten iron after iron removaling；
Wherein, the content of carburant is the 0.08-0.13% of steel scrap weight, and the particle diameter of carburant is less than 200nm；
（3）Molten iron in stove is warming up to 1450-1470 DEG C, is incubated, rests, molten iron chemical composition is reached uniform state；
（4）Inovulant is added during cast, casting is taken out after 10 minutes, is heat-treated, treats that it is cooled to room temperature blast cleaning, machinery adds
Work, be put in storage, produce after inspection.
2. a kind of casting technique of clutch compressing disc as claimed in claim 1, it is characterised in that contain in the molten iron after the iron removaling
Sulfur content is 0.025-0.05wt%, copper content 0.02-0.05wt%, manganese content 0.58-0.72wt%, amount containing molybdenum are 0.17-
0.34wt%, silicon content 2.6-2.8wt%, phosphorus content 4.25-4.75wt%, stanniferous amount are 0.035-0.072wt%, barium content
It is inevitable impurity and iron for 0.008-0.016wt%, surplus.
3. a kind of casting technique of clutch compressing disc as claimed in claim 1, it is characterised in that the carburant is blown into completion
Afterwards, continue to be passed through the nitrogen 25-30 seconds.
4. a kind of casting technique of clutch compressing disc as claimed in claim 1, it is characterised in that the temperature of the nitrogen is not less than
50℃。
A kind of 5. casting technique of clutch compressing disc as claimed in claim 1, it is characterised in that each component of the carburant
For：Nitrogen content is 0.04-0.05wt%, sulfur content 0.28-0.32wt%, carbon content 96-97wt%, surplus are impurity；Breed
Agent is Si-Sr.
6. a kind of casting technique of clutch compressing disc as claimed in claim 1, it is characterised in that the process of the heat treatment is：
1-1.5 hours are incubated under conditions of being 500-550 DEG C in temperature, 850-900 DEG C is then heated to, is incubated 25-30 minutes, cooling
To 600-650 DEG C of insulation 2-3 hour, fast cooling to insulation 25-30 minutes after 240-280 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710688350.5A CN107419164A (en) | 2017-08-12 | 2017-08-12 | A kind of casting technique of clutch compressing disc |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710688350.5A CN107419164A (en) | 2017-08-12 | 2017-08-12 | A kind of casting technique of clutch compressing disc |
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| Publication Number | Publication Date |
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| CN107419164A true CN107419164A (en) | 2017-12-01 |
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| CN201710688350.5A Pending CN107419164A (en) | 2017-08-12 | 2017-08-12 | A kind of casting technique of clutch compressing disc |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371313A (en) * | 2018-12-05 | 2019-02-22 | 含山县天宇机械铸造厂 | A kind of preparation process of wear-resistant automobile clutch pressure plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110094632A1 (en) * | 2005-03-04 | 2011-04-28 | Laszlo Pelsoeczy | Ledeburite cast iron with a high carbide content and an evenly distributed graphite embodiment |
| CN106350726A (en) * | 2015-07-20 | 2017-01-25 | 李芳� | Casting technology of automobile braking drum |
-
2017
- 2017-08-12 CN CN201710688350.5A patent/CN107419164A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110094632A1 (en) * | 2005-03-04 | 2011-04-28 | Laszlo Pelsoeczy | Ledeburite cast iron with a high carbide content and an evenly distributed graphite embodiment |
| CN106350726A (en) * | 2015-07-20 | 2017-01-25 | 李芳� | Casting technology of automobile braking drum |
Non-Patent Citations (3)
| Title |
|---|
| （苏）西多连柯: "《喷粉冶金的理论和实践 上》", 30 September 1983, 冶金工业出版社 * |
| 杨绍利等: "《钛铁矿熔炼钛渣与生铁技术》", 30 April 2006, 冶金工业出版社 * |
| 邓宏运等: "《消失模铸造及实型铸造技术手册》", 31 January 2013, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371313A (en) * | 2018-12-05 | 2019-02-22 | 含山县天宇机械铸造厂 | A kind of preparation process of wear-resistant automobile clutch pressure plate |
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Application publication date: 20171201 |
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