CN106702271A - Low alloy and high strength B50E54C casting material and casting preparation method - Google Patents
Low alloy and high strength B50E54C casting material and casting preparation method Download PDFInfo
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- CN106702271A CN106702271A CN201611022735.XA CN201611022735A CN106702271A CN 106702271 A CN106702271 A CN 106702271A CN 201611022735 A CN201611022735 A CN 201611022735A CN 106702271 A CN106702271 A CN 106702271A
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- casting
- b50e54c
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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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)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a low alloy and high strength B50E54C casting material, which is composed of the following components by mass%: 0.25-0.35% of C, 1.00-1.60% of Mn, 0.25-0.60% of Si, less than or equal to 0.05% of P, less than or equal to 0.05% of S, 0.25-0.50% of Mo, and the balance Fe. An intermediate frequency furnace is employed for steelmaking, and a smelting process appropriately increasing the Mo content is adopted; A normalizing and tempering, and quenching and tempering technology is employed; a metal aluminum mould is adopted for casting; welding repair process standard is formulated, and the problem of casting cracks is solved through preheating, heat insulation, repair welding and welding rod selection. A casting obtained by means of the low alloy and high strength B50E54C casting material and the casting preparation method provided by the invention has the characteristics of low cost, high dimensional precision, high hardness, good mechanical properties and few crack, and meets the technical requirements of large engineering vehicle steel casting planet carriers for low alloy content, high mechanical strength index, high hardness index, and long service life.
Description
【Technical field】
The present invention relates to the technical field of casting material, the B50E54C casting materials of more particularly to a kind of low-alloy high-strength
Material and and casting prepare method.
【Background technology】
280 tons of heavy truck low-speed carriers of GE companies of the U.S. are large engineering vehicle steel-casting planet carriers, and it needs height
Strength materials meet its use requirement, while being control cost, need to control the alloying component of material, that is, need a kind of low-alloy
High-strength material meets use requirement.GE companies for many years in the supplier of positive looking for qualified all over the world, but due to
Developing material difficulty is big, and casting quality requirement is high, and supplier that is suitable and possessing volume shipment ability is not found always.And GE phases
Close material cast annual requirement big, breach is huge, with wide market prospects and economic benefit.
In order to improve the quality and intensity of gradually material, the high intensity for meeting large engineering vehicle steel-casting planet carrier makes
With requiring, the economic benefit of enterprise is improved, it is necessary to propose the B50E54C casting materials and and casting of a kind of low-alloy high-strength
The method of preparation, alloy content is low, mechanical property intensity index is high, hardness number is high, long service life to reach cast product
Deng requirement.
【The content of the invention】
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of B50E54C of low-alloy high-strength
Casting material, it aims to solve the problem that large engineering vehicle steel-casting planet carrier casting material development difficulty is big in the prior art,
Production cost is high, and intensity is not enough, the short technical problem of service life.
To achieve the above object, the present invention proposes a kind of B50E54C casting materials of low-alloy high-strength, by with the following group
Divide and constituted according to quality %：C be 0.25~0.35%, Mn be 1.00~1.60%, Si be 0.25~0.60%, P for≤
0.05%, S are that≤0.05%, Mo is 0.25~0.50%, and remaining is Fe, add up to 100%.
Preferably, being made up of according to quality % following components：C is that 0.28~0.35%, Mn is 1.10~1.50%, Si
It is that 0.30~0.50%, P is that≤0.03%, S is that≤0.02%, Mo is 0.30~0.40%, remaining is Fe, adds up to 100%.
Preferably, being made up of according to quality % following components：C is that 0.32%, Mn is that 1.30%, Si is that 0.40%, P is
0.02%, S are that 0.01%, Mo is 0.35%, and remaining is Fe, add up to 100%.
Preferably, the tensile strength Rm of the casting body being made up of a kind of casting material of described low-alloy high-strength
>=1035MPa, it is stipulated that plastic elongation intensity Rp0.2>=862MPa, elongation after fracture A >=10%, contraction percentage of area Z >=25%, cloth
Family name's hardness HB >=280N/mm2。
It is a kind of to prepare the method prepared by a kind of B50E54C casting materials casting of low-alloy high-strength, using intermediate frequency furnace
Steel-making, and using the smelting process of Mo contents is properly increased, the upper limit of Mo contents is controlled 0.40~0.50%.
It is a kind of to prepare the method prepared by a kind of B50E54C casting materials casting of low-alloy high-strength, cast casting work
Metal aluminum dipping form is used in skill, and application CAE is simulated analysis.
It is a kind of to prepare the method prepared by a kind of B50E54C casting materials casting of low-alloy high-strength, at the heat of casting
Using normalizing, tempering plus quenched technique, keep medium is circulated science and engineering skill when quenched.
A kind of to prepare the method prepared by a kind of B50E54C casting materials casting of low-alloy high-strength, casting is produced and split
Prevented using repair welding during line, described repair welding parameter is：Preheating temperature >=200 DEG C, interlayer temperature≤350
DEG C, soldering current control in the range of 170~210A, voltage is controlled in the range of 22~28V, using DC reverse connection, welding rod choosing
Use J757Ni.
Beneficial effects of the present invention：Compared with prior art, the B50E54C of a kind of low-alloy high-strength that the present invention is provided
Casting material and and casting prepare method, had the following advantages that compared with prior art：1. casting material composition is with carbon steel as base material,
A small amount of Mo elements are only added, material cost has been efficiently controlled；2. casting using just, tempering plus quenched technique, it is quenched
When keep medium circulation, can effectively solve the problems, such as to add appropriate Mo in castings material and make casting section thickness differ larger,
Ensure that it is quenched after casting part hardness is high and uniform, good mechanical properties；3. cast using metal aluminum dipping form, it is ensured that casting
The dimensional accuracy of part；4. because casting is easily cracked, it is arranging of preventing casting to crack to select suitable process for welding repair
One of apply, the present invention has worked out process for welding repair specification, casting generation is solved by preheating, insulation, soldering, the selection of welding rod and is split
The problem of line.
Feature of the invention and advantage will be described in detail by embodiment.
【Specific embodiment】
To make the object, technical solutions and advantages of the present invention of greater clarity, below by embodiment, the present invention is entered
Row is further described.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, and without
In limitation the scope of the present invention.Additionally, in the following description, eliminate the description to known features and technology, so that avoid need not
Obscure idea of the invention in strategic point.
The embodiment of the present invention provides a kind of casting material of low-alloy high-strength, is made up of according to quality % following components：C
It is 0.25~0.35%, Mn for 1.00~1.60%, Si is that 0.25~0.60%, P is≤0.05%, S for≤0.05%, Mo is
0.25~0.50%, remaining is Fe, adds up to 100%.
The embodiment of the present invention also provides a kind of a kind of side of the casting for preparing and being made up of casting material of low-alloy high-strength
Method, using steel-making of intermediate frequency furnace, and using properly increasing the smelting process of Mo contents, the upper limit control of Mo contents 0.40~
0.50%；Metal aluminum dipping form is used in cast casting technique, and application CAE is simulated analysis；The Technology for Heating Processing of casting is used
Normalizing, tempering plus quenched technique, keep medium circulation when quenched；Prevented using repair welding when casting is cracked,
Described repair welding parameter is：Preheating temperature >=200 DEG C, interlayer temperature≤350 DEG C, soldering current control are in 170~210A
In the range of, voltage is controlled in the range of 22~28V, using DC reverse connection, selection of electrodes J757Ni.
In embodiments of the present invention, it is both square using steel-making of intermediate frequency furnace with the smelting process that Mo contents are combined is properly increased
Just smelting operation and quality control, reduce production cost again；The dimensional accuracy of casting is can ensure that using metal aluminum dipping form, due to this
Castings material is easily cracked, particularly at fillet, by multiple modified technique, using different processes：Chill, benefit
Patch or chill+subsidy, and tested using various different techniques, analysis on Stress Field is carried out using CAE, to field of flow, fill
Type process and process of setting carry out numerical simulation, therefrom find out most suitable casting technique and are cast, and reach and improve casting
Quality, reduces the purpose that crackle is produced；Because casting is easily cracked, it is that prevention casting is produced to select suitable process for welding repair
One of measure of crackle, solves the problems, such as that casting is cracked by preheating, insulation, soldering, the selection of welding rod.
In embodiments of the present invention, castings material is that appropriate Mo is added on the basis of carbon steel, due to casting section thickness phase
Difference is larger, and thickness is 150mm, and thinnest part is 50mm, selects appropriate Technology for Heating Processing just to can ensure that casting bulk properties reach
To requiring, by test of many times, casting using just, tempering plus quenched technique, keep medium circulation when quenched, using special
Suspender, special quenching bath, special messenger are responsible for, it is ensured that quenched uniform, make it is quenched after casting hardness is high and uniform, mechanical property is good
It is good.
Embodiment one,
The casting being prepared from by a kind of casting material of low-alloy high-strength of the invention, the chemical composition of casting material
For C is：C is that 0.25%, Mn is that 1.00%, Si is that 0.25%, P is that 0.01%, S is that 0.01%, Mo is 0.25%, and remaining is
Fe, adds up to 100%, when using steel-making of intermediate frequency furnace, can also add appropriate Mo without Mo, makes the Mo contents in casting
0.3~0.4%.
Embodiment two,
The casting being prepared from by a kind of casting material of low-alloy high-strength of the invention, the chemical composition of casting material
For C for 0.32%, Mn is that 1.30%, Si is that 0.40%, P is that 0.02%, S is that 0.01%, Mo is 0.35%, remaining is Fe, is closed
Meter 100%, when using steel-making of intermediate frequency furnace, can properly increase Mo contents, the content of Mo is improved to 0.4 from 0.35%~
0.5%.
Embodiment three,
The casting being prepared from by a kind of casting material of low-alloy high-strength of the invention, the chemical composition of casting material
For C for 0.35%, Mn is that 1.60%, Si be 0.60%, P is≤0.05%, S for≤0.05%, Mo is 0.50%, remaining is
Fe, adds up to 100%, when using steel-making of intermediate frequency furnace, it is not necessary to add Mo.
During heat treating castings in embodiment one, embodiment two, embodiment three using just, tempering plus quenched technique,
And prevented using repair welding when cracking, repair welding parameter is：Preheating temperature >=200 DEG C, interlayer temperature≤350
DEG C, soldering current control in the range of 170~210A, voltage is controlled in the range of 22~28V, using DC reverse connection, welding rod choosing
Use J757Ni.
Tensile strength Rm >=the 1035MPa of the casting body in embodiment one, embodiment two, embodiment three, it is stipulated that plasticity
Extension strength Rp0.2>=862MPa, elongation after fracture A >=10%, contraction percentage of area Z >=25%, Brinell hardness HB >=280N/
mm2, casting bulk strength reaches the 90% of setting, with alloy content it is low, mechanical property intensity index is high, hardness number
The characteristics of height, long service life.
The present invention provide a kind of low-alloy high-strength B50E54C casting materials and and casting prepare method, technique
Stabilization, strong mechanical property reliability has filled up domestic blank, in the leading level in the world.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent or improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (8)
1. B50E54C casting materials of a kind of low-alloy high-strength, it is characterised in that：It is made up of according to quality % following components：C
It is 0.25~0.35%, Mn for 1.00~1.60%, Si is that 0.25~0.60%, P is≤0.05%, S for≤0.05%, Mo is
0.25~0.50%, remaining is Fe, adds up to 100%.
2. B50E54C casting materials of a kind of low-alloy high-strength as claimed in claim 1, it is characterised in that：By with the following group
Divide and constituted according to quality %：C be 0.28~0.35%, Mn be 1.10~1.50%, Si be 0.30~0.50%, P for≤
0.03%, S are that≤0.02%, Mo is 0.30~0.40%, and remaining is Fe, add up to 100%.
3. B50E54C casting materials of a kind of low-alloy high-strength as claimed in claim 1, it is characterised in that：By with the following group
Divide and constituted according to quality %：C is that 0.32%, Mn is that 1.30%, Si is that 0.40%, P is that 0.02%, S is that 0.01%, Mo is
0.35%, remaining is Fe, adds up to 100%.
4. B50E54C casting materials of a kind of low-alloy high-strength as claimed in claim 1, it is characterised in that：By described
Tensile strength Rm >=the 1035MPa of the casting body that a kind of casting material of low-alloy high-strength is constituted, it is stipulated that plastic elongation is strong
Degree Rp0.2>=862MPa, elongation after fracture A >=10%, contraction percentage of area Z >=25%, Brinell hardness HB >=280N/mm2。
5. a kind of B50E54C casting material systems of a kind of low-alloy high-strength prepared as described in Claims 1-4 any one
Standby method, it is characterised in that：Using steel-making of intermediate frequency furnace, and using properly increasing the smelting process of Mo contents, Mo contents it is upper
Limit control is 0.40~0.50%.
6. a kind of B50E54C casting material systems of a kind of low-alloy high-strength prepared as described in Claims 1-4 any one
Standby method, it is characterised in that：Metal aluminum dipping form is used in cast casting technique, and application CAE is simulated analysis.
7. a kind of B50E54C casting material systems of a kind of low-alloy high-strength prepared as described in Claims 1-4 any one
Standby method, it is characterised in that：The Technology for Heating Processing of casting is using normalizing, tempering plus quenched technique, keep medium when quenched
Circulation.
8. a kind of B50E54C casting material systems of a kind of low-alloy high-strength prepared as described in Claims 1-4 any one
Standby method, it is characterised in that：Prevented using repair welding when casting is cracked, described repair welding parameter is：
Preheating temperature >=200 DEG C, interlayer temperature≤350 DEG C, soldering current control in the range of 170~210A, voltage control 22~
In the range of 28V, using DC reverse connection, selection of electrodes J757Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611022735.XA CN106702271A (en) | 2016-11-21 | 2016-11-21 | Low alloy and high strength B50E54C casting material and casting preparation method |
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| CN201611022735.XA CN106702271A (en) | 2016-11-21 | 2016-11-21 | Low alloy and high strength B50E54C casting material and casting preparation method |
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| CN201611022735.XA Pending CN106702271A (en) | 2016-11-21 | 2016-11-21 | Low alloy and high strength B50E54C casting material and casting preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234640A (en) * | 2018-11-16 | 2019-01-18 | 泉州市恒通机械配件有限公司 | A kind of cast steel and its production technology |
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| US4343661A (en) * | 1978-11-15 | 1982-08-10 | Caterpillar Tractor Co. | Method of making a low temperature bainite steel alloy gear |
| US4533405A (en) * | 1982-10-07 | 1985-08-06 | Amax Inc. | Tubular high strength low alloy steel for oil and gas wells |
| JPH03285045A (en) * | 1990-04-02 | 1991-12-16 | Nippon Steel Corp | Steel bar or steel wire for prestressed concrete having improved weldability |
| JPH0559492A (en) * | 1991-09-03 | 1993-03-09 | Nippon Steel Corp | High strength hot rolled steel sheet of composite structure excellent in ductility and its manufacture |
| CN101376945A (en) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | 2000MPa grade superhigh intensity high tenacity steel plate and manufacturing method thereof |
| CN102586677A (en) * | 2012-03-23 | 2012-07-18 | 三一重型装备有限公司 | Low-carbon low-alloy steel and preparation method thereof |
| CN102936692A (en) * | 2012-10-23 | 2013-02-20 | 安徽荣达阀门有限公司 | Cold punching die mold steel processing method |
| CN103898405A (en) * | 2014-03-20 | 2014-07-02 | 济钢集团有限公司 | 780Mpa-grade molybdenum-boron high-strength structural steel plate and manufacturing method thereof |
-
2016
- 2016-11-21 CN CN201611022735.XA patent/CN106702271A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343661A (en) * | 1978-11-15 | 1982-08-10 | Caterpillar Tractor Co. | Method of making a low temperature bainite steel alloy gear |
| US4533405A (en) * | 1982-10-07 | 1985-08-06 | Amax Inc. | Tubular high strength low alloy steel for oil and gas wells |
| JPH03285045A (en) * | 1990-04-02 | 1991-12-16 | Nippon Steel Corp | Steel bar or steel wire for prestressed concrete having improved weldability |
| JPH0559492A (en) * | 1991-09-03 | 1993-03-09 | Nippon Steel Corp | High strength hot rolled steel sheet of composite structure excellent in ductility and its manufacture |
| CN101376945A (en) * | 2007-08-28 | 2009-03-04 | 宝山钢铁股份有限公司 | 2000MPa grade superhigh intensity high tenacity steel plate and manufacturing method thereof |
| CN102586677A (en) * | 2012-03-23 | 2012-07-18 | 三一重型装备有限公司 | Low-carbon low-alloy steel and preparation method thereof |
| CN102936692A (en) * | 2012-10-23 | 2013-02-20 | 安徽荣达阀门有限公司 | Cold punching die mold steel processing method |
| CN103898405A (en) * | 2014-03-20 | 2014-07-02 | 济钢集团有限公司 | 780Mpa-grade molybdenum-boron high-strength structural steel plate and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234640A (en) * | 2018-11-16 | 2019-01-18 | 泉州市恒通机械配件有限公司 | A kind of cast steel and its production technology |
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