CN108277439A - The production method of crawler track chain link connector 15B36-M2 steel - Google Patents
The production method of crawler track chain link connector 15B36-M2 steel Download PDFInfo
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- CN108277439A CN108277439A CN201810281498.1A CN201810281498A CN108277439A CN 108277439 A CN108277439 A CN 108277439A CN 201810281498 A CN201810281498 A CN 201810281498A CN 108277439 A CN108277439 A CN 108277439A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C33/04—Making ferrous alloys by melting
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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Abstract
The invention belongs to special steel material production technical fields, specifically provide a kind of production method of crawler track chain link connector 15B36 M2 steel.Raw material passes through 50tEBT electric furnace smeltings → LF stoves refining treatment → VD and is vacuum-treated the Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in stove processing → 235mm × 265mm → 800 successively obtains steel, by weight percentage, including following component, C：0.33~0.36%；Si：0.20~0.30%；Mn：1.10~1.30%；P：≤ 0.025%；S：0.005~0.015%；Cr：0.30~0.40%；Alt：0.015~0.035%；Ti：0.010~0.040%；B：0.0008~0.0030%；Surplus is iron and inevitable impurity.Chemical composition careful design of the present invention and control ensure that the quenching degree of steel, and product specification concentrates on Φ 80 hereinafter, being produced using small section billet, and the rate of steel products produced to steel ingots is high.
Description
Technical field
The invention belongs to special steel material production technical fields, specifically provide a kind of crawler track chain link connector 15B36-M2
The production method of steel.
Background technology
15B36-M2 belongs to special steel class technical field of smelting, for processing crawler of excavator rail chain link connector.
For 15B36-M2 for exporting South Korea's forge plant prosperous greatly, the big prosperous forging of South Korea is main to produce the heavy types such as Volvo excavator, bull-dozer
Fill spare units.The steel after processing is forged bear heavy load, have wearability after direct quenching and lonneal by manufacture
Part.15B36-M2 steel is close with the fractions of 35MnB steel, and boron is all contained in steel, and the effect of boron effectively improves steel
Quenching degree (the end quenching degree test point of two trades mark is different).Therefore it is required that reducing the oxygen in steel, on the basis of nitrogen content, protect
Demonstrate,prove the stabilization of boron content in steel.The conduct of aluminium, Ti content is abundant deoxidation and fixed nitrogen in steel, prevents boron from being aoxidized or anti-with nitrogen
B should be generated2O3, BN etc..Using before Fruit storage, blows the top of the slag open using argon bottom-blowing and be directly added into ferro-boron or feeding boron
Iron core-spun yarn carries out the mode of boron micro-alloyed processing, improves the rate of recovery of boron.
The domestic prior art produces 35MnB using electric furnace (converter)+LF refining+VD (RH) vacuum degasing pretreatments path.It should
Method haves the shortcomings that several main：
1, electric furnace uses steel scrap to be produced for raw material, and impurity, the residual element content steel of steel scrap influence the machinability of steel
Can, quenching degree.
Although 2, converter producing residual element content is low, component segregation is more difficult to control, and lumber recovery is low.
Invention content
In order to solve the above technical problem, the present invention provides a kind of productions of crawler track chain link connector 15B36-M2 steel
Method, raw material use steel scrap hot metal charging, molten iron proportioning 70~90%.The aluminium, titanium of addition 0.025% when refining, to ensure that boron contains
The stabilization of amount, acquisition hardenability of steel J12.7 is 42~50HRC, J19 is 30~40HRC.The sulphur of addition 0.010%, is conducive to
Improve the machinability of steel.Continuous casting is inclined to reduce Chemical Composition in Cast Billet using low overheat, permanent pulling rate, electromagnetic agitation
Analysis.
The invention is realized in this way the production method of crawler track chain link connector 15B36-M2 steel, raw material pass through successively
50tEBT electric furnace smeltings → LF stoves refining treatment → VD is vacuum-treated billet caster → end in stove processing → 235mm × 265mm
The Continuous mill train tandem rolling of inlet side outlet walking beam type heating furnace → 800 obtains steel, by weight percentage, including following component, C：
0.33~0.36%；Si：0.20~0.30%；Mn：1.10~1.30%；P：≤ 0.025%；S：0.005~0.015%；Cr：
0.30~0.40%；Alt：0.015~0.035%；Ti：0.010~0.040%；B：0.0008~0.0030%；Surplus is iron
With inevitable impurity.
Further, using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 10~30%, molten iron proportioning 70~90%.
Further, in the electric furnace smelting process, using dioxygen oxidation, foamed slag, decarburized amount >=0.25% have been made；Go out
Steel bar part：P≤specification 0.012%, temperature T=1640, residual elements meet the requirements；Add when pre-deoxidation pre-deoxidant 2.0~
3.0kg/t；In alloying process, when tapping 1/4, which sequentially adds, increases C agent, alloy material and slag charge, C and alloying element by under specification
Limit control.
Further, in the LF stoves refining treatment process, 1~3kg/t of addition diffusion is diffused de- after melt cinder is formed
Second batch is added in oxygen, closed furnace door 10min, and slag is white after total 2~4kg/t of addition, 5min, and temperature reaches requirement, takes a sample；
Al lines are fed after sample return, Al in steel is adjusted to 0.020% or more；It is mended depending on Al content in steel and feeds Al lines, finished product Al controls
System 0.015~0.025%, quiet Argon >=10min feed S lines, and quiet Argon >=5min feeds boron line by upper specification limit；Argon gas controls
In the process, 0.2~0.4MPa of pressure is fluctuated with the top of the slag, and molten steel is not exposed to be advisable.
Further, the VD is vacuum-treated in stove processing procedure, enters 0.2~0.5kg/t of feeding silicon-calcium wire before VD；Argon gas
Control keeps 0.1~0.3MPa of pressure；Vacuum degree 100Pa, retention time >=10min；Quiet 2~the 3min of Argon of molten steel, Ar Pressure
0.1~0.3MPa of power, molten steel of being subject to be not exposed.
Further, in continuous casting working procedure, total process protective casting prevents secondary oxidation of steel；Mold liquid level is controlled automatically
System, will avoid crystallizer liquid steel level unusual fluctuations；It is stirred using M-EMS and combining for solidification end electromagnetic agitation
Mix mode；Control 20~30 DEG C of molten steel overheat；Whole process keeps permanent pulling rate.
Further, in heating process, 1180~1220 DEG C of steel billet tapping temperature；In the operation of rolling, start rolling temperature 1130
~1150 DEG C, 900 DEG C of finishing temperature.
Compared with the prior art, the advantages of the present invention are as follows：
1, chemical composition is accurately designed and is controlled, and ensure that the quenching degree of steel；
2, product specification concentrates on Φ 80 hereinafter, being produced using small section billet, and the rate of steel products produced to steel ingots is high.
Description of the drawings
Fig. 1 is the field trash result figure of product of the embodiment of the present invention；
Fig. 2 is the quenching degree result figure of product of the embodiment of the present invention.
Specific implementation mode
With reference to specific embodiment, explanation is further explained to the present invention, but is not limited to this
The protection domain of invention.
Embodiment 1,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.33%；Si：0.20%；Mn：1.10%；P：≤ 0.025%；S：0.005%；Cr：
0.30%；Alt：0.015%；Ti：0.010%；B：0.0008%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 10%, molten iron proportioning 90%.
In the electric furnace smelting process, using dioxygen oxidation, foamed slag, decarburized amount >=0.25% have been made；Tapping condition：P
≤ specification 0.012%, temperature T=1640, residual elements meet the requirements；Add 2.0~3.0kg/t of pre-deoxidant when pre-deoxidation；It closes
During aurification, when tapping 1/4, which sequentially adds, increases C agent, and alloy material and slag charge, C and alloying element are by lower specification limit control.
In the LF stoves refining treatment process, melt cinder is added 1~3kg/t of diffusion and is diffused deoxidation, closed furnace door after being formed
Second batch is added in 10min, and slag is white after total 2~4kg/t of addition, 5min, and temperature reaches requirement, takes a sample；Sample return
Al lines are fed afterwards, and Al in steel is adjusted to 0.020% or more；It is mended depending on Al content in steel and feeds Al lines, finished product Al controls 0.015~
0.025%, quiet Argon >=10min feed S lines, and quiet Argon >=5min feeds boron line by upper specification limit；During argon gas control, pressure
0.2~0.4MPa of power, is fluctuated with the top of the slag, and molten steel is not exposed to be advisable.
The VD is vacuum-treated in stove processing procedure, enters 0.2~0.5kg/t of feeding silicon-calcium wire before VD；Argon gas control is kept
0.1~0.3MPa of pressure；Vacuum degree 100Pa, retention time >=10min；Quiet 2~the 3min of Argon of molten steel, argon pressure 0.1~
0.3MPa, molten steel of being subject to be not exposed.
In continuous casting working procedure, total process protective casting prevents secondary oxidation of steel；Mold liquid level automatically controls, and to avoid
Crystallizer liquid steel level unusual fluctuations；Using the joint agitating mode of M-EMS and solidification end electromagnetic agitation；Control
20~30 DEG C of molten steel overheat processed；Whole process keeps permanent pulling rate.
In heating process, 1180~1220 DEG C of steel billet tapping temperature；In the operation of rolling, 1130~1150 DEG C of start rolling temperature,
900 DEG C of finishing temperature.
Embodiment 2,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.36%；Si：0.30%；Mn：1.30%；P：≤ 0.025%；S：0.015%；Cr：
0.40%；Alt：0.035%；Ti：0.040%；B：0.0030%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 30%, molten iron proportioning 70%.
Remaining is same as Example 1.
Embodiment 3,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.34%；Si：0.25%；Mn：1.20%；P：≤ 0.025%；S：0.010%；Cr：
0.35%；Alt：0.025%；Ti：0.025%；B：0.0020%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 20%, molten iron proportioning 80%.
Remaining is same as Example 1.
Embodiment 4,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.34%；Si：0.23%；Mn：1.19%；P：0.008%；S：0.012%；Cr：0.35%；
Alt：0.022%；Ti：0.03%；B：0.0016%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 15%, molten iron proportioning 85%.
Remaining is same as Example 1.
Embodiment 5,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.33%；Si：0.25%；Mn：1.18%；P：0.008%；S：0.01%；Cr：0.30~
0.40%；Alt：0.025%；Ti：0.03%；B：0.0014%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 18%, molten iron proportioning 82%.
Remaining is same as Example 1.
Embodiment 6,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.34%；Si：0.24%；Mn：1.2%；P：0.008%；S：0.012%；Cr：0.34%；
Alt：0.023%；Ti：0.03%；B：0.0013%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 22%, molten iron proportioning 78%.
Remaining is same as Example 1.
Embodiment 7,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.34%；Si：0.24%；Mn：1.21%；P：0.011%；S：0.01%；Cr：0.34%；
Alt：0.019%；Ti：0.02%；B：0.0015%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 25%, molten iron proportioning 75%.
Remaining is same as Example 1.
Embodiment 8,
The present embodiment provides the production methods that a kind of electric furnace produces crawler of excavator rail chain link connector 15B36-M2 steel：
Raw material pass through successively 50tEBT electric furnace smeltings → LF stoves refining treatment → VD be vacuum-treated stove processing → 235mm ×
The Continuous mill train tandem rolling of billet caster → end inlet side outlet walking beam type heating furnace in 265mm → 800 obtains steel, by weight percentage
Than meter, including following component, C：0.33%；Si：0.24%；Mn：1.18%；P：0.01%；S：0.009%；Cr：0.34%；
Alt：0.02%；Ti：0.02%；B：0.0017%；Surplus is iron and inevitable impurity.
Using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 30%, molten iron proportioning 70%.
Remaining is same as Example 1.
The embodiment 4-8 steel tissues prepared are detected, see the table below：
The field trash just now and end hardenability prepared to the present invention is tested, and sees Fig. 1 and Fig. 2 (abscissas of Fig. 1
Abscissa for the levels of the standard of field trash, Fig. 2 is standard value).
It is found that having dense structure using 15B36-M2 steel produced by the invention, degree of purity is high, and quenching degree is stablized, and becomes a useful person
The advantages that rate is high.
Claims (7)
1. the production method of crawler track chain link connector 15B36-M2 steel, which is characterized in that raw material passes through 50tEBT electric furnaces successively
Smelting → LF stoves refining treatment → VD is vacuum-treated stove processing → billet caster in 235mm × 265mm → and holds into bringing out stepping
The Continuous mill train tandem rolling of beam type heating furnace → 800 obtains steel, by weight percentage, including following component, C：0.33~
0.36%；Si：0.20~0.30%；Mn：1.10~1.30%；P：≤ 0.025%；S：0.005~0.015%；Cr：0.30~
0.40%；Alt：0.015~0.035%；Ti：0.010~0.040%；B：0.0008~0.0030%；Surplus is iron and can not
The impurity avoided.
2. according to the method for claim 1, which is characterized in that using steel scrap hot metal charging as furnace charge, steel scrap proportioning is 10
~30%, molten iron proportioning 70~90%.
3. according to the method for claim 1, which is characterized in that in the electric furnace smelting process, using dioxygen oxidation, make
Foamed slag, decarburized amount >=0.25%；Tapping condition：P≤specification 0.012%, temperature T=1640, residual elements meet the requirements；In advance
Add 2.0~3.0kg/t of pre-deoxidant when deoxidation；In alloying process, when tapping 1/4, which sequentially adds, increases C agent, alloy material and slag
Material, C and alloying element are controlled by lower specification limit.
4. according to the method for claim 1, which is characterized in that in the LF stoves refining treatment process, melt cinder adds after being formed
Enter 1~3kg/t of diffusion and be diffused deoxidation, closed furnace door 10min is added second batch, slag after total 2~4kg/t of addition, 5min
In vain, temperature reaches requirement, takes a sample；Al lines are fed after sample return, Al in steel is adjusted to 0.020% or more；Depending on steel
Middle Al content, which is mended, feeds Al lines, and finished product Al controls 0.015~0.025%, quiet Argon >=10min feeds S lines, and quiet Argon >=5min is pressed
Upper specification limit feeds boron line；During argon gas control, 0.2~0.4MPa of pressure is fluctuated with the top of the slag, and molten steel is not exposed to be advisable.
5. according to the method for claim 1, which is characterized in that the VD is vacuum-treated in stove processing procedure, is fed before entering VD
Enter 0.2~0.5kg/t of silicon-calcium wire；Argon gas control keeps 0.1~0.3MPa of pressure；Vacuum degree 100Pa, retention time >=10min；
Molten steel quiet 2~3min of Argon, 0.1~0.3MPa of argon pressure, molten steel of being subject to be not exposed.
6. according to the method for claim 1, which is characterized in that in continuous casting working procedure, total process protective casting prevents molten steel two
Secondary oxidation；Mold liquid level automatically controls, and to avoid crystallizer liquid steel level unusual fluctuations；Using M-EMS and coagulate
Gu the joint agitating mode of end electromagnetic agitation；Control 20~30 DEG C of molten steel overheat；Whole process keeps permanent pulling rate.
7. according to the method for claim 1, which is characterized in that in heating process, 1180~1220 DEG C of steel billet tapping temperature；
In the operation of rolling, 1130~1150 DEG C of start rolling temperature, 900 DEG C of finishing temperature.
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| CN201810281498.1A CN108277439A (en) | 2018-04-02 | 2018-04-02 | The production method of crawler track chain link connector 15B36-M2 steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234606A (en) * | 2018-09-25 | 2019-01-18 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of track link rail hot rolled circular steel |
| CN109664958A (en) * | 2018-11-19 | 2019-04-23 | 安徽东升精密铸钢件有限公司 | A kind of crawler-mounted excavator rail chain structure and its processing method |
| CN110904388A (en) * | 2019-12-30 | 2020-03-24 | 本钢板材股份有限公司 | Excavator crawler belt steel BG45MnCrB and preparation method thereof |
| CN112593148A (en) * | 2020-11-19 | 2021-04-02 | 南京钢铁股份有限公司 | Steel for large-pitch track link and preparation method thereof |
| CN113957211A (en) * | 2021-10-27 | 2022-01-21 | 宝武杰富意特殊钢有限公司 | Heating control method for preventing decarburization of steel bar of hot-rolled caterpillar track link |
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| CN102719750A (en) * | 2012-04-24 | 2012-10-10 | 本钢板材股份有限公司 | Wear resistant steel and smelting method thereof |
| CN103952640A (en) * | 2014-04-26 | 2014-07-30 | 广东韶钢松山股份有限公司 | 35MnB steel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102719750A (en) * | 2012-04-24 | 2012-10-10 | 本钢板材股份有限公司 | Wear resistant steel and smelting method thereof |
| CN103952640A (en) * | 2014-04-26 | 2014-07-30 | 广东韶钢松山股份有限公司 | 35MnB steel and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234606A (en) * | 2018-09-25 | 2019-01-18 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of track link rail hot rolled circular steel |
| CN109664958A (en) * | 2018-11-19 | 2019-04-23 | 安徽东升精密铸钢件有限公司 | A kind of crawler-mounted excavator rail chain structure and its processing method |
| CN110904388A (en) * | 2019-12-30 | 2020-03-24 | 本钢板材股份有限公司 | Excavator crawler belt steel BG45MnCrB and preparation method thereof |
| CN112593148A (en) * | 2020-11-19 | 2021-04-02 | 南京钢铁股份有限公司 | Steel for large-pitch track link and preparation method thereof |
| CN112593148B (en) * | 2020-11-19 | 2022-04-19 | 南京钢铁股份有限公司 | Steel for large-pitch track link and preparation method thereof |
| CN113957211A (en) * | 2021-10-27 | 2022-01-21 | 宝武杰富意特殊钢有限公司 | Heating control method for preventing decarburization of steel bar of hot-rolled caterpillar track link |
| CN113957211B (en) * | 2021-10-27 | 2023-06-30 | 宝武杰富意特殊钢有限公司 | Heating control method for preventing decarburization of hot-rolled caterpillar chain track section steel bar |
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