CN102653834B - Circular chain steel and production method thereof - Google Patents
Circular chain steel and production method thereof Download PDFInfo
- Publication number
- CN102653834B CN102653834B CN201210135118.6A CN201210135118A CN102653834B CN 102653834 B CN102653834 B CN 102653834B CN 201210135118 A CN201210135118 A CN 201210135118A CN 102653834 B CN102653834 B CN 102653834B
- Authority
- CN
- China
- Prior art keywords
- carry out
- temperature
- control
- steel
- cooled
- 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.)
- Active
Links
Landscapes
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a kind of circular chain steel and a production method thereof. The circular chain steel comprises the following compositions in percentage by weight: 0.20-0.25% of C, 0.42-0.55% of Si, 1.05-1.60% of Mn, less than or equal to 0.040% of P, less than or equal to 0.040% of S, less than or equal to 0.52% of Ceq, and the balance of Fe and inevitable impurities. The production method comprises the steps of smelting; continuous casting and heating; rolling; water-controlled cooling; piecewise cutting; air cooling; and cutting to length, and packaging for standby. According to the invention, the defect of welding cracks caused by high manganese content is eliminated; the circular chain steel is loose in P, S control, and easy to process and make; and because of adopting controlled cooling after rolling, the yield strength of the steel is increased to 380Mpa and above, and the tensile strength is greater than 580MPa.
Description
Technical field
The present invention relates to ferrous materials and production method thereof, specifically belong to the method for a kind of annular chains steel and production thereof.
Background technology
Annular chains is mainly used in binding object, and as the handling such as wood, shaped steel, it is had relatively high expectations by the yield strength of steel to annular chains, according to the requirement of the development of technology and security, requires at present its yield strength more than 380MPa.
In the prior art, annular chains is a kind of with steel is to adopt by the 20Mn2 trade mark steel in GB/T3077, and its technique is electricity/converter+LF refinery practice, does thermal treatment inspection.The deficiency of its existence: the one, P, S require too strict; The 2nd, operational path is long, adopts after electricity/converter smelting, also needs the refining furnace through LF, has increased refining procedure cost; The 3rd, because Mn content is higher, the welding property during chain is made is unfavorable.
The component of 20Mn2 trade mark steel and weight content list
Technical process is: electricity/converter smelting → refining → continuous casting → heating → rolling → naturally cooling → shearing → packaging (cooling without controlling).
The second is according to the composition to chain steel, the chain steel that performance defined is produced in Japanese chain round steel standard JIS G3105-2004.The deficiency of its existence makes: mechanical property is on the low side, yield strength is not done to requirement, and tensile strength only requires 490MPa, and it can not meet current requirement.
Component and weight content list to chain steel in round steel standard JIS G3105-2004 for Japan's chain
Technical process: electricity/converter smelting → continuous casting → heating → rolling → naturally cooling → shearing → packaging (cooling without controlling).
Summary of the invention
The problem to be solved in the present invention is: overcome current P, S content with steel too strict, tap to tap time is long, because Mn content is compared with high and easily produce welding crack, or mechanical property is low, the deficiency that can not meet the demands, provide a kind of P, S to control loose, can not produce welding crack and can ensure that its yield strength is in 380MPa and above, tensile strength is greater than 580MPa annular chains steel and the method for production thereof.
Realize the measure of above-mentioned purpose:
A kind of annular chains steel, its component and weight percent content: C:0.20～0.25%, Si:0.42～0.55%, Mn: 1.05～1.60%, P≤0.040%, S≤0.040%, Ceq≤0.52%, all the other are Fe and inevitable impurity.
Produce the method for a kind of annular chains steel, its step:
1) smelt: control P≤0.12% in molten steel, S≤0.04%, and carry out remaining slag operation, control the basicity of slag 2.8～3.5; Argon blowing time is not less than 4 minutes;
2) carry out continuous casting heating, heating and temperature control is being not less than 1280 DEG C, and be 60～90 minutes heat-up time; The component of strand and weight percent content: C:0.20～0.25%, Si:0.42～0.55%, Mn: 1.05～1.60%, P≤0.040%, S≤0.040%, Ceq≤0.52%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature not higher than 1120 DEG C, finishing temperature, higher than 1100 DEG C, is not rolled down to desired size;
4) water is controlled coolingly, controls cooling rear temperature at 850～900 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to temperature not higher than 400 DEG C;
7) carry out cutting to length, and packed for standby use.
The function and mechanism of each element in the present invention:
C: carbon is strengthening element the most basic in steel.In steel, carbon content increases, and yield-point and tensile strength raise, but plasticity and impact reduction, in the time that carbon content exceedes 0.25%, the welding property of steel degenerates, the therefore structural low alloy steel for welding, and carbon content is generally no more than 0.25%.In addition, carbon can increase cold shortness and the aging sensitivity of steel.
Si: silicon is solution strengthening element, can significantly improve Yield Of Steel and tensile strength, therefore be widely used in the strengthening element of structural alloy steel.Silicone content, as lower than 0.42%, can cause yield strength to reduce, and as higher than 0.55%, can cause yield strength too high, makes annular chains cause processing difficulties with the Plasticity Decreasing of steel.
Mn: manganese is solution strengthening element, even if add 0.80% when above " manganese steel " in carbon steel, not only has enough toughness, and has higher intensity and hardness, improves the quenching property of steel, improves the comprehensive process performance of steel, as higher by 40% than Q235 yield-point in Q345 steel.Manganese amount increases, and reduces welding property.
P: generally, phosphorus is harmful element in steel.Easily produce segregation, increase the cold shortness of steel, welding property is degenerated; Reduce plasticity, cold-bending property is degenerated.For the structure iron that has certain service requirements, require phosphorus content in steel to be less than 0.040%.
S: sulphur is also harmful element under normal conditions.Make steel produce red brittleness, reduce ductility and the toughness of steel, in the time of rolling, cause crackle.Sulphur is also unfavorable to welding property.So for the structure iron that has certain requirements, require sulphur content to be less than 0.040%.
Ceq:Ceq=C+Mn/6, the index proposing when welding property is had to requirement, to ensure that welding material does not crack under certain condition.
The present invention is compared with technology, and it has eliminated the defect because of the higher welding crack causing of manganese content, and P, S control loose, and processing and fabricating is easy, through adopting cooling control after rolling, the yield strength that has improved steel to 380MPa and more than, tensile strength is greater than 580MPa.
Embodiment
Below the present invention is described in detail:
Test conditions: smelt in 35t converter.
Embodiment 1
Production yield strength is 415MPa, the chain round steel that nominal diameter is 11 millimeters, and its component and weight percent are: C:0.23%, Mn:1.06%, Si:0.42%, P:0.027%, S:0.025%, Ceq:0.41%, all the other are Fe and inevitable impurity.
Its production stage:
1) smelt: control P:0.115% in molten steel, S:0.037%, and carry out remaining slag operation, the basicity of slag is 2.8; Argon blowing time is 4.1 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1275～1280 DEG C, and be 61 minutes heat-up time; The component of strand and weight percent content: C:0.23%, Mn:1.06%, Si:0.42%, P:0.027%, S:0.025%, Ceq:0.41%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1110～1120 DEG C, finishing temperature is at 1090～1100 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 850～860 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 385 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
Embodiment 2
Production yield strength is 415MPa, the chain round steel that nominal diameter is 18 millimeters, and its component and weight percent are: C:0.20%, Mn:1.40%, Si:0.48%, P:0.026%, S:0.024%, Ceq:0.43%, all the other are Fe and inevitable impurity.
Its production stage:
1) smelt: control P:0.11% in molten steel, S:0.032%, and carry out remaining slag operation, the basicity of slag is 3.0; Argon blowing time is 4.2 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1265～1270 DEG C, and be 70 minutes heat-up time; The component of strand and weight percent content: C:0.20%, Mn:1.40%, Si:0.48%, P:0.026%, S:0.024%, Ceq:0.43%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1105～1110 DEG C, finishing temperature is at 1080～1085 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 870～875 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 395 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
Embodiment 3
Production yield strength is 420MPa, the chain round steel that nominal diameter is 30 millimeters, and its component and weight percent are: C:0.22%, Mn:1.56%, Si:0.55%, P:0.031%, S:0.019%, Ceq:0.48%, all the other are Fe and inevitable impurity.
Its production stage:
1) smelt: control P:0.118% in molten steel, S:0.03%, and carry out remaining slag operation, the basicity of slag is 3.3; Argon blowing time is 4.5 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1260～1265 DEG C, and be 90 minutes heat-up time; The component of strand and weight percent content: C:0.22%, Mn:1.56%, Si:0.55%, P:0.031%, S:0.019%, Ceq:0.48%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1085～1090 DEG C, finishing temperature is at 1070～1075 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 895～900 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 380 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
Embodiment 4
Production yield strength is 425MPa, the chain round steel that nominal diameter is 32 millimeters, and its component and weight percent are: C:0.25%, Mn:1.60%, Si:0.52%, P:0.029%, S:0.016%, Ceq:0.52%, all the other are Fe and inevitable impurity.
Its production stage:
1) smelt: control P:0.115% in molten steel, S:0.025%, and carry out remaining slag operation, the basicity of slag is 3.5; Argon blowing time is 4.7 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1265～1275 DEG C, and be 85 minutes heat-up time; The component of strand and weight percent content: C:0.25%, Mn:1.60%, Si:0.52%, P:0.029%, S:0.016%, Ceq:0.52%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1065～1070 DEG C, finishing temperature is at 1055～1060 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 885～890 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 385 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
After testing, it the results are shown in Table 1 to the various embodiments described above steel.
Its performance list after testing of the each embodiment steel of table 1
| Embodiment | R el/MPa | R m/MPa | Unit elongation A/% | Clod wash |
| 1 | 420 | 620 | 33.5 | Well |
| 2 | 415 | 620 | 31.5 | Well |
| 3 | 420 | 650 | 26.0 | Well |
| 4 | 425 | 660 | 26.0 | Well |
Claims (4)
1. produce the method for a kind of annular chains steel, its step:
1) smelt: control P:0.115% in molten steel, S:0.037%, and carry out remaining slag operation, the basicity of slag is 2.8; Argon blowing time is 4.1 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1275～1280 DEG C, and be 61 minutes heat-up time; The component of strand and weight percent content: C:0.23%, Mn:1.06%, Si:0.42%, P:0.027%, S:0.025%, Ceq:0.41%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1110～1120 DEG C, finishing temperature is at 1090～1100 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 850～860 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 385 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
2. produce the method for a kind of annular chains steel, its step:
1) smelt: control P:0.11% in molten steel, S:0.032%, and carry out remaining slag operation, the basicity of slag is 3.0; Argon blowing time is 4.2 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1265～1270 DEG C, and be 70 minutes heat-up time; The component of strand and weight percent content: C:0.20%, Mn:1.40%, Si:0.48%, P:0.026%, S:0.024%, Ceq:0.43%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1105～1110 DEG C, finishing temperature is at 1080～1085 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 870～875 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 395 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
3. produce the method for a kind of annular chains steel, its step:
1) smelt: control P:0.118% in molten steel, S:0.03%, and carry out remaining slag operation, the basicity of slag is 3.3; Argon blowing time is 4.5 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1260～1265 DEG C, and be 90 minutes heat-up time; The component of strand and weight percent content: C:0.22%, Mn:1.56%, Si:0.55%, P:0.031%, S:0.019%, Ceq:0.48%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1085～1090 DEG C, finishing temperature is at 1070～1075 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 895～900 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 380 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
4. produce the method for a kind of annular chains steel, its step:
1) smelt: control P:0.115% in molten steel, S:0.025%, and carry out remaining slag operation, the basicity of slag is 3.5; Argon blowing time is 4.7 minutes;
2) carry out continuous casting heating, heating and temperature control is at 1265～1275 DEG C, and be 85 minutes heat-up time; The component of strand and weight percent content: C:0.25%, Mn:1.60%, Si:0.52%, P:0.029%, S:0.016%, Ceq:0.52%, all the other are Fe and inevitable impurity;
3) be rolled, control start rolling temperature at 1065～1070 DEG C, finishing temperature is at 1055～1060 DEG C, rolling to needing size;
4) carry out water-cooled, control cooling rear temperature at 885～890 DEG C;
5) nibbling shear;
6) carry out air cooling, be cooled to 385 DEG C of temperature;
7) carry out cutting to length, and packed for standby use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135118.6A CN102653834B (en) | 2012-05-04 | 2012-05-04 | Circular chain steel and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135118.6A CN102653834B (en) | 2012-05-04 | 2012-05-04 | Circular chain steel and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102653834A CN102653834A (en) | 2012-09-05 |
| CN102653834B true CN102653834B (en) | 2014-11-26 |
Family
ID=46729563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210135118.6A Active CN102653834B (en) | 2012-05-04 | 2012-05-04 | Circular chain steel and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102653834B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952198A (en) * | 2005-10-17 | 2007-04-25 | 马鞍山钢铁股份有限公司 | Trace niobium -containing steel for cooling-control reinforced bar and method for producing same |
| CN101519751A (en) * | 2008-02-27 | 2009-09-02 | 宝山钢铁股份有限公司 | High-performance marine mooring chain steel and manufacturing method thereof |
| CN102383031A (en) * | 2011-10-28 | 2012-03-21 | 武汉钢铁(集团)公司 | High-strength binding band and production method thereof |
| JP5098388B2 (en) * | 2007-03-20 | 2012-12-12 | 日本電気株式会社 | Clock correction circuit and method and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033178B2 (en) * | 1980-11-28 | 1985-08-01 | 新日本製鐵株式会社 | Chain with excellent toughness and tensile strength of 70Kg/mm↑2 or more and its manufacturing method |
| JPH0598388A (en) * | 1991-10-04 | 1993-04-20 | Sumitomo Metal Ind Ltd | High toughness and high carbon thin steel sheet and its manufacture |
-
2012
- 2012-05-04 CN CN201210135118.6A patent/CN102653834B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1952198A (en) * | 2005-10-17 | 2007-04-25 | 马鞍山钢铁股份有限公司 | Trace niobium -containing steel for cooling-control reinforced bar and method for producing same |
| JP5098388B2 (en) * | 2007-03-20 | 2012-12-12 | 日本電気株式会社 | Clock correction circuit and method and system |
| CN101519751A (en) * | 2008-02-27 | 2009-09-02 | 宝山钢铁股份有限公司 | High-performance marine mooring chain steel and manufacturing method thereof |
| CN102383031A (en) * | 2011-10-28 | 2012-03-21 | 武汉钢铁(集团)公司 | High-strength binding band and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 朱中平.20Mn2与国外钢号对照.《中外钢号对照手册》.化学工业出版社,2007, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102653834A (en) | 2012-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106661705B (en) | carburized alloy steel and preparation method and application thereof | |
| CN103160729B (en) | Medium-carbon microalloyed steel for engineering machinery caterpillar chain piece and production process thereof | |
| CN109957707B (en) | Weather-resistant cold-heading steel wire rod for 1000 MPa-level fastener and production method thereof | |
| TW201718907A (en) | Steel wire rod for wire drawing | |
| CN103361561A (en) | Seamless steel tube material for coupling material and preparation method thereof | |
| CN109957728B (en) | Weather-resistant cold heading steel wire rod for 800 MPa-level fastener and production method thereof | |
| CN111485167A (en) | Hot-rolled round steel for rare earth microalloyed 25MnCrNiMoA coupler yoke and production method thereof | |
| CN103194683B (en) | Containing rare earth oil well pipe coupling material weldless steel tube material and preparation method thereof | |
| CN104372245B (en) | A kind of high-strength building steel plate and production method thereof | |
| CN104451375A (en) | Q235C super-thick steel plate having thickness of 160mm and low compression ratio and preparation method of steel plate | |
| CN102653834B (en) | Circular chain steel and production method thereof | |
| CN106676418A (en) | Atmosphere corrosion resisting profile steel liquid containing niobium and nitrogen, atmosphere corrosion resisting profile steel and production method of atmosphere corrosion resisting profile steel | |
| CN103667955B (en) | A kind of steel with high impact strength and foundry goods thereof | |
| CN106676417B (en) | The atmosphere corrosion resistance structural steel molten steel of nitrogen containing vanadium and atmosphere corrosion resistance structural steel and its production method | |
| CN106676402B (en) | The atmosphere corrosion resistance structural steel molten steel of titanium containing chromium and atmosphere corrosion resistance structural steel and its production method | |
| CN106676398B (en) | The nitrogen atmosphere corrosion resistance structural steel molten steel of titanium containing vanadium and atmosphere corrosion resistance structural steel and its production method | |
| CN106676427B (en) | Atmosphere corrosion resistance structural steel molten steel and the nitrogen atmosphere corrosion resistance structural steel of titanium containing vanadium and its production method | |
| CN103451544A (en) | Boracic 140 ksi steel grade petroleum casing pipe for deep well and extra-deep well and production method thereof | |
| CN103243270A (en) | Novel low-cost, wear-resistant and high-strength Q460B steel plate and production method thereof | |
| CN103243269A (en) | Novel low-cost, wear-resistant and high-strength Q420A/B steel plate and production method thereof | |
| CN110230003B (en) | High-strength low-alloy heat-resistant cast steel material suitable for alpine regions and preparation process thereof | |
| CN106676426B (en) | Atmosphere corrosion resistance structural steel molten steel and atmosphere corrosion resistance structural steel containing Cr-V-Ti and its production method | |
| CN106676423B (en) | The atmosphere corrosion resistance structural steel molten steel of titanium containing vanadium and atmosphere corrosion resistance structural steel and its production method | |
| CN106676421B (en) | Atmosphere corrosion resistance structural steel molten steel and titaniferous nitrogen atmosphere corrosion resistance structural steel and its production method | |
| CN106676419B (en) | Titaniferous nitrogen atmosphere corrosion resistance structural steel molten steel and atmosphere corrosion resistance structural steel and its production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180322 Address after: No. 215, Wuchang Avenue, Hubei, Ezhou, Hubei Patentee after: Echeng Iron and Steel Co., Ltd., of Wuhan Iron and Steel Group Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 215, Wuchang Avenue, Hubei, Ezhou, Hubei Patentee after: Baowu group Echeng Iron and Steel Co., Ltd Address before: No. 215, Wuchang Avenue, Hubei, Ezhou, Hubei Patentee before: WUHAN IRON AND STEEL GROUP ECHENG IRON AND STEEL Co.,Ltd. |