CN108193128A - A kind of high tenacity concrete pumps bend pipe casting method - Google Patents
A kind of high tenacity concrete pumps bend pipe casting method Download PDFInfo
- Publication number
- CN108193128A CN108193128A CN201810156293.0A CN201810156293A CN108193128A CN 108193128 A CN108193128 A CN 108193128A CN 201810156293 A CN201810156293 A CN 201810156293A CN 108193128 A CN108193128 A CN 108193128A
- Authority
- CN
- China
- Prior art keywords
- molten iron
- bend pipe
- casting
- concrete pump
- nodularization
- Prior art date
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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- 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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a kind of high tenacity concretes to pump bend pipe casting method, includes the following steps：1）Dispensing is smelted into molten iron, and 2）Nodularization is bred, and 3）Molten iron is transferred in parcel, breeds cast；4）Casting means of isothermal quenching.Compared with prior art, the proportioning and optimization spheroidization and inoculation and isothermal quenching technique of the invention by adjusting wherein chemical composition, hence it is evident that the mechanical property of concrete pump bend pipe can be improved.
Description
Technical field
The present invention relates to a kind of high tenacity concretes to pump bend pipe casting method.
Background technology
Applicant applied for a kind of patent of invention of the casting method of concrete pump truck elbow, Shen on 2 15th, 2016
While reducing production cost, tensile strength please be promoted to 1600 more than MPa, extended number for 201610085699.5
Rate has reached 2%, by this 2 years production practices, applicant is by adjusting the proportioning of wherein chemical composition and optimization ball
Change is bred and isothermal quenching technique, hence it is evident that can improve the mechanical property of concrete pump bend pipe.
Invention content
For the problems of the prior art, the invention aims to provide a kind of high tenacity concrete pump bend pipe casting method.
In order to achieve the above object, the technical scheme is that：A kind of high tenacity concrete pumps bend pipe casting method, including with
Lower step：
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.5~3.8%、Si 2.4~2.8%、S 0~0.02%、
P 0 ~ 0.05%, Mg 0.03 ~ 0.04%, Ni 0.01 ~ 0.05%, Sn 0.1 ~ 0.3%, Cu 0.4%, surplus Fe；
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1 ~ 1.2wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 40 ~ 45s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization
It finishes and scratches clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.1 ~ 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1 ~ 2h, temperature are 920 DEG C, and casting is quenched into 260 ~ 300 DEG C of salt bath and keeping the temperature 1 ~ 2h within the time no more than 15s,
Then it is cleaned to obtain concrete pump bend pipe.
Further, step 3）Cast answers sand technique using iron film.
Compared with prior art, the present invention spheroidization and inoculation and waits by adjusting the proportioning of wherein chemical composition and optimization
Warm quenching technical, hence it is evident that the mechanical property of concrete pump bend pipe can be improved.
Specific embodiment
The present invention is further described with reference to embodiment.
Embodiment 1
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.5%、Si 2.4%、Mg 0.03%、Ni 0.01%、
Sn 0.1%, Cu 0.4%, surplus Fe；P and S is impurity, reduces its content as far as possible.
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1.2wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 40s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization is complete
Finish and scratch clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min, and cast answers sand technique using iron film；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1h, temperature are 920 DEG C, casting quench within the time no more than 15s in 260 DEG C of salt bath and keep the temperature 2h, then through clear
It washes to obtain concrete pump bend pipe.
Embodiment 2
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.8%、Si 2.8%、Mg 0.04%、Ni 0.05%、
Sn 0.1%, Cu 0.4%, surplus Fe；P and S is impurity, reduces its content as far as possible.
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1.2wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 40s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization is complete
Finish and scratch clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min, and cast answers sand technique using iron film；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1.5h, temperature are 920 DEG C, casting quench within the time no more than 15s in 300 DEG C of salt bath and keep the temperature 1h, Ran Houjing
Cleaning obtains concrete pump bend pipe.
Embodiment 3
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.6%、Si 2.5%、Mg 0.03%、Ni 0.03%、
Sn 0.2%, Cu 0.4%, surplus Fe；P and S is impurity, reduces its content as far as possible.
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 40 ~ 45s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization
It finishes and scratches clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min, and cast answers sand technique using iron film；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1.5h, temperature are 920 DEG C, casting quench within the time no more than 15s in 280 DEG C of salt bath and keep the temperature 2h, Ran Houjing
Cleaning obtains concrete pump bend pipe.
Embodiment 4
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.7%、Si 2.7%、Mg 0.03%、Ni 0.05%、
Sn 0.1%, Cu 0.4%, surplus Fe；P and S is impurity, reduces its content as far as possible.
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1.2wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 45s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization is complete
Finish and scratch clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min, and cast answers sand technique using iron film；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1h, temperature are 920 DEG C, casting quench within the time no more than 15s in 300 DEG C of salt bath and keep the temperature 2h, then through clear
It washes to obtain concrete pump bend pipe.
After testing, the mechanical property of embodiment 1-4 is as shown in the table：
| Tensile strength Rm/MPa | Yield strength Rp0.2, MPa | Elongation A/% | Hardness HBS | Impact toughness α k/J/cm2 | |
| Embodiment 1 | 1648 | 1308 | 4.5 | 437 | 102 |
| Embodiment 2 | 1642 | 1305 | 5.0 | 445 | 85.5 |
| Embodiment 3 | 1632 | 1305 | 3.5 | 450 | 92.7 |
| Embodiment 4 | 1657 | 1311 | 4.0 | 450 | 93 |
All simple deformations made in the case where not departing from core of the present invention or modification each fall within protection scope of the present invention.
Claims (2)
1. a kind of high tenacity concrete pumps bend pipe casting method, which is characterized in that includes the following steps：
1）Dispensing is smelted into molten iron, and molten iron each element weight percent is：C 3.5~3.8%、Si 2.4~2.8%、S 0~0.02%、
P 0 ~ 0.05%, Mg 0.03 ~ 0.04%, Ni 0.01 ~ 0.05%, Sn 0.1 ~ 0.3%, Cu 0.4%, surplus Fe；
2）Nodularization is bred, by step 1）Obtained molten iron is poured into equipped with 1 ~ 1.2wt% La system's rare earth magnesium nodularizers and 0.3wt%
In the lid packet of silicon titanate innoculant, molten iron dumping time is 40 ~ 45s, and after molten iron is toppled over, the nodularization time is no less than 60s；Nodularization
It finishes and scratches clean molten iron surface scum, and be sprinkled into YC-1 covertures again, prevent molten iron oxidation and keep the temperature；
3）Molten iron is transferred in parcel, 0.1 ~ 0.2wt% silicon titanate innoculants are blowed to by molten iron using air-flow in the process, breed cast,
Concrete pump bend pipe casting, that is, plastic as cast condition concrete that obtains pumps bend pipe after 40min；
4）Qualified as cast condition concrete pump bend pipe is put into resistance furnace and heats and carry out austenitizing heat preservation by casting means of isothermal quenching
1 ~ 2h, temperature are 920 DEG C, and casting is quenched into 260 ~ 300 DEG C of salt bath and keeping the temperature 1 ~ 2h within the time no more than 15s,
Then it is cleaned to obtain concrete pump bend pipe.
A kind of 2. casting method of high tenacity concrete pump bend pipe according to claim 1, which is characterized in that step 3）Cast is adopted
Sand technique is answered with iron film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156293.0A CN108193128A (en) | 2018-02-24 | 2018-02-24 | A kind of high tenacity concrete pumps bend pipe casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156293.0A CN108193128A (en) | 2018-02-24 | 2018-02-24 | A kind of high tenacity concrete pumps bend pipe casting method |
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| Publication Number | Publication Date |
|---|---|
| CN108193128A true CN108193128A (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156293.0A Pending CN108193128A (en) | 2018-02-24 | 2018-02-24 | A kind of high tenacity concrete pumps bend pipe casting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5397919A (en) * | 1977-02-09 | 1978-08-26 | Hitachi Metals Ltd | Pearlite spheroidal graphite cast iron with no aftercast treatment |
| JPS57188645A (en) * | 1981-05-13 | 1982-11-19 | Takaoka Kogyo Kk | Nodular graphite cast iron and its manufacture |
| CN102218504A (en) * | 2011-05-18 | 2011-10-19 | 大连新重集团有限公司 | Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting |
| CN102575326A (en) * | 2009-10-05 | 2012-07-11 | 宝马股份公司 | Cast iron cast part and method for production thereof |
| CN105568124A (en) * | 2014-10-09 | 2016-05-11 | 陕西重型汽车有限公司 | QT500-7 nodular cast iron material added with tin, and processing method thereof, and cast |
| CN105695852A (en) * | 2016-02-15 | 2016-06-22 | 焦作固德联合机械制造有限公司 | Casting method for concrete pump truck bent pipe |
-
2018
- 2018-02-24 CN CN201810156293.0A patent/CN108193128A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5397919A (en) * | 1977-02-09 | 1978-08-26 | Hitachi Metals Ltd | Pearlite spheroidal graphite cast iron with no aftercast treatment |
| JPS57188645A (en) * | 1981-05-13 | 1982-11-19 | Takaoka Kogyo Kk | Nodular graphite cast iron and its manufacture |
| CN102575326A (en) * | 2009-10-05 | 2012-07-11 | 宝马股份公司 | Cast iron cast part and method for production thereof |
| CN102218504A (en) * | 2011-05-18 | 2011-10-19 | 大连新重集团有限公司 | Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting |
| CN105568124A (en) * | 2014-10-09 | 2016-05-11 | 陕西重型汽车有限公司 | QT500-7 nodular cast iron material added with tin, and processing method thereof, and cast |
| CN105695852A (en) * | 2016-02-15 | 2016-06-22 | 焦作固德联合机械制造有限公司 | Casting method for concrete pump truck bent pipe |
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Application publication date: 20180622 |