CN103215495A - Hot-dipped galvanized plate for side surrounding plate of washing machine and production method of hot-dipped galvanized plate - Google Patents
Hot-dipped galvanized plate for side surrounding plate of washing machine and production method of hot-dipped galvanized plate Download PDFInfo
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- CN103215495A CN103215495A CN2013101360692A CN201310136069A CN103215495A CN 103215495 A CN103215495 A CN 103215495A CN 2013101360692 A CN2013101360692 A CN 2013101360692A CN 201310136069 A CN201310136069 A CN 201310136069A CN 103215495 A CN103215495 A CN 103215495A
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Abstract
The invention discloses a hot-dipped galvanized plate for a side surrounding plate of a washing machine. The hot-dipped galvanized plate comprises the following components in percentage by weight: 0.0020wt%-0.0080wt% of C, not more than 0.04wt% of Si, 0.10wt%-0.30wt% of Mn, not more than 0.020wt% of P, not more than 0.015wt% of S, 0.010wt%-0.060wt% of Alt, not more than 0.0050wt% of N, less than 0.09wt% of Ti and the balance of Fe. The invention further discloses a production method of the hot-dipped galvanized plate. The production method sequentially comprises the following steps of: hot roll, cold rolling and hot galvanizing, wherein the hot rolling includes heating up the casting blank to 1150 DEG C to 1250 DEG C, controlling the final rolling temperature to 900 DEG C and 950 DEG C and controlling the rolling temperature to 600 DEG C to 700 DEG C. The hot-dipped galvanized plate for the side surrounding plate of the washing machine provided by the invention is free of any alloy element; moreover, the corresponding hot rolling, cold rolling and hot galvanizing processes are correspondingly improved, so that the hot-dipped galvanized plate for the side surrounding plate of the washing machine is economically and stably produced in a large-scale manner.
Description
Technical field
The present invention relates to the heat zinc coating plate technical field, particularly a kind of washing machine gusset plate heat zinc coating plate and production method thereof.
Background technology
Washing machine gusset plate is one of sheet material the strictest in the tame electroplax to the requirement of steel always, and it not only is embodied in the high request to surface quality, is also embodied in its high request to the intensity processability and the ageing resistance performance of steel plate.Colour coated plate is the development trend of tame electroplax outside plate, and washing machine gusset plate major part is to supply the refrigerator outside plate with heat zinc coating plate after color coating.And color coating just is equivalent to artificial aging, and washing machine gusset plate all has bigger radian at the column place, if ageing resistance performance difference then is easy to occur the barring defective at washing machine column place, so it requires to have high ageing resistance performance to steel plate.In addition, because the cylinder of washing machine needs load and high speed rotating, the cylinder place needs deep-draw simultaneously, so washing machine gusset plate requires heat zinc coating plate to have high strength and high-mouldability performance.Therefore how economic, stable, production washing machine gusset plate in batches with the continuously dip coat zine plate of high strength high-mouldability and high ageing resistance performance always each big steel enterprise capture this commanding elevation of tame electroplax concentrate on studies " trump card ".
Summary of the invention
Technical problem to be solved by this invention provides a kind of washing machine gusset plate heat zinc coating plate, solves production cost height, inefficient problem that existing washing machine gusset plate exists with heat zinc coating plate.
For solving the problems of the technologies described above, the invention provides a kind of washing machine gusset plate heat zinc coating plate, comprise: C:0.0020～0.0080wt%, Si :≤0.04wt%, Mn:0.10～0.30wt%, P :≤0.020wt%, S≤0.015wt%, Alt:0.010～0.060wt%, N :≤0.0050wt%, Ti＜0.09%, surplus are Fe.
In order to solve the problems of the technologies described above, the present invention also provides its production method, and order comprises: hot rolling, cold rolling and pot galvanize;
Described hot rolling comprises: with 1150～1250 ℃ of strand heating; The control finishing temperature is 900～950 ℃, and coiling temperature is 600～700 ℃.
Further, described hot rolling also comprises: between roughing and finish rolling, use stay-warm case.
Further, described cold rolling comprise control draft be 55～85%.
Further, described pot galvanize comprises: control heating zone temperature is 700～780 ℃, and the polishing elongation control is 0.9～2.0%.
Washing machine gusset plate heat zinc coating plate provided by the invention, the composition system that adopts, do not add any alloying element, only improve the intensity of steel plate by suitable raising C content, improve corresponding hot rolling, cold rolling and continuous zinc coating technology simultaneously, thus economical, in batches, stable production washing machine gusset plate heat zinc coating plate.
Embodiment
The washing machine gusset plate that the embodiment of the invention provides heat zinc coating plate and production method thereof, satisfied of the requirement of washing machine gusset plate with high strength, high-mouldability and high ageing resistance performance, have high processability and high anti-low aging performance when improving its intensity, to satisfy the user to the performance requriements of washing machine gusset plate to pot galvanize.
The present invention satisfies the performance requriements of washing machine gusset plate to heat zinc coating plate, by chemical ingredients reasonable in design, hot rolling, cold rolling and hot dip galvanizing process system, obtains the continuous hot galvanizing steel plate of the high ageing resistance of high strength high-mouldability energy.Technical process is: KR desulfurization processing → conventional converter steelmaking → RH refining treatment → continuous casting → process furnace → roughing → finish rolling → laminar flow cools off → batches; Cold rolling: uncoiling → pickling → five frame cold continuous rollings → batch; Pot galvanize: uncoiling → cleaning → continuous annealing → pot galvanize → polishing → batch obtains washing machine gusset plate continuously dip coat zine plate.
The washing machine gusset plate heat zinc coating plate that the embodiment of the invention provides, comprise: C:0.0020～0.0080wt%, Si :≤0.04wt%, Mn are 0.10～0.30wt%, P :≤0.020wt%, S≤0.015wt%, Alt:0.010～0.060wt%, N :≤0.0050wt%, Ti＜0.09%, and surplus is Fe substantially.
The washing machine gusset plate that the embodiment of the invention the provides production method of heat zinc coating plate comprises:
Hot rolling technology comprises: with 1150～1250 ℃ of strand heating, be 3～5 hours heat-up time earlier; Through Fixed width pressure, obtain needed strand width; Through two roller roughing and four roller roughing, the roughing pattern adopts the 3+3 pattern, to improve its output again; Between roughing and finish rolling, enable stay-warm case, it is too fast to prevent that the intermediate blank temperature from reducing; Pass through finishing train again; Batch after the laminar flow cooling.Strict control finishing temperature and coiling temperature in the course of hot rolling guarantee that the two-phase particle is fully separated out in the steel, and strict control finishing temperature is 900～950 ℃, and coiling temperature is 600～700 ℃;
Cold-rolling process comprises: with hot rolled coil uncoiling crop, remove its scale on surface after the straightening scale breading enters pickling tank, enter 5 frame tandem mills tandem rollings then, and the control draft is 55～85%, batch the back for chill volume;
Hot dip galvanizing process comprises: with the chill CGL of the company of twisting in unit ingress uncoiling crop material loading, remove its surface and oil contaminant through cleaning section and enter vertical continuous annealing furnace, the coating that acquisition needs behind the zinc pan gas cutter batches through polishing machine, straightening more then afterwards again.Hot galvanizing process strict control heating zone temperature and smooth unit elongation, control heating zone temperature is 700～780 ℃, the polishing unit elongation is looked its thickness specifications vary and is controlled at 0.9～2.0%.
To sum up, washing machine gusset plate that the embodiment of the invention provides is with heat zinc coating plate and production method thereof, by chemical ingredients reasonable in design and production process system, thereby can be economical, in batches, stable production washing machine gusset plate heat zinc coating plate.
Below be specific examples provided by the invention:
Example one
After molten iron process KR desulfurization processing, conventional converter steelmaking, RH refining processing, carry out continuous casting again, gained steel grade chemical ingredients is C:0.0033wt%, Si:0.01wt%, Mn:0.12wt%, P:0.010wt%, S:0.008wt%, Alt:0.0350wt%, N:0.0028wt%, Ti:0.05%, and surplus is Fe substantially.
In course of hot rolling, strand is heated to 1180 ℃, be 3.5 heat-up time, and finishing temperature is 910 ℃, and coiling temperature is 615 ℃; Carry out cold rollingly then, behind the broken phosphorus of uncoiling straightening on the sour milling train group, enter after the pickling of shallow slot turbulent flow removes its scale on surface, enter 5 frame cold continuous rollings, the control draft is 65%; Carry out pot galvanize at last, enter vertical continuous annealing furnace in the uncoiling of Continuous Hot Dip Galvanizing ingress, after cleaning, control heating zone temperature is 730 ℃, passes through smoothly then, and controls smooth unit elongation 1.2%, batches to be finished product.Obtaining specification at last is the washing machine gusset plate heat zinc coating plate of 0.7mm * 1250mm, and its yield strength, tensile strength and elongation after fracture A80 index are respectively 195MPa, 315MPa and 43%; The yield point elongation length of its stress strain curve is 0%, also promptly possesses high strength high-mouldability and high ageing resistance performance, satisfies the service requirements of user to washing machine gusset plate.
Example two
After molten iron process KR desulfurization processing, conventional converter steelmaking, RH refining processing, carry out continuous casting again, gained steel grade chemical ingredients is C:0.0042wt%, Si:0.013wt%, Mn:0.13wt%, P:0.013wt%, S:0.012wt%, Alt:0.0450wt%, N:0.0033wt%, Ti:0.06%, and surplus is Fe substantially.
In course of hot rolling, strand is heated to 1210 ℃, be 3.7 heat-up time, and finishing temperature is 915 ℃, and coiling temperature is 622 ℃; Carry out cold rollingly then, behind the broken phosphorus of uncoiling straightening on the sour milling train group, enter after the pickling of shallow slot turbulent flow removes its scale on surface, enter 5 frame cold continuous rollings, the control draft is 60%; Carry out pot galvanize at last, enter vertical continuous annealing furnace in the uncoiling of Continuous Hot Dip Galvanizing ingress, after cleaning, control heating zone temperature is 745 ℃, passes through smoothly then, and controls smooth unit elongation 1.4%, batches to be finished product.Obtaining specification at last is the washing machine gusset plate heat zinc coating plate of 0.8mm * 1250mm, and its yield strength, tensile strength and elongation after fracture A80 index are respectively 203MPa, 319MPa and 41%; The yield point elongation length of its stress strain curve is 0%, also promptly possesses high strength high-mouldability and high ageing resistance performance, satisfies the service requirements of user to washing machine gusset plate.
Example three
After molten iron process KR desulfurization processing, conventional converter steelmaking, RH refining processing, carry out continuous casting again, gained steel grade chemical ingredients is C:0.0055wt%, Si:0.018wt%, Mn:0.12wt%, P:0.009wt%, S:0.008wt%, Alt:0.030wt%, N:0.0027wt%, Ti:0.065%, and surplus is Fe substantially.
In course of hot rolling, strand is heated to 1170 ℃, be 3.4 heat-up time, and finishing temperature is 905 ℃, and coiling temperature is 648 ℃; Carry out cold rollingly then, behind the broken phosphorus of uncoiling straightening on the sour milling train group, enter after the pickling of shallow slot turbulent flow removes its scale on surface, enter 5 frame cold continuous rollings, the control draft is 75%; Carry out pot galvanize at last, enter vertical continuous annealing furnace in the uncoiling of Continuous Hot Dip Galvanizing ingress, after cleaning, control heating zone temperature is 740 ℃, passes through smoothly then, and controls smooth unit elongation 1.0%, batches to be finished product.Obtaining specification at last is the washing machine gusset plate heat zinc coating plate of 0.6mm * 1250mm, and its yield strength, tensile strength and elongation after fracture A80 index are respectively 209MPa, 317MPa and 42%; The yield point elongation length of its stress strain curve is 0%, also promptly possesses high strength high-mouldability and high ageing resistance performance, satisfies the service requirements of user to washing machine gusset plate.
Claims (5)
1. a washing machine gusset plate heat zinc coating plate is characterized in that, comprises: C:0.0020～0.0080wt%, Si :≤0.04wt%, Mn:0.10～0.30wt%, P :≤0.020wt%, S≤0.015wt%, Alt:0.010～0.060wt%, N :≤0.0050wt%, Ti＜0.09%, surplus is Fe.
2. washing machine gusset plate as claimed in claim 1 is characterized in that with the production method of heat zinc coating plate order comprises: hot rolling, cold rolling and pot galvanize;
Described hot rolling comprises: with 1150～1250 ℃ of strand heating; The control finishing temperature is 900～950 ℃, and coiling temperature is 600～700 ℃.
3. production method as claimed in claim 2 is characterized in that, described hot rolling also comprises: between roughing and finish rolling, use stay-warm case.
4. production method as claimed in claim 2 is characterized in that, described cold rolling comprise control draft be 55～85%.
5. as each described production method of claim 2 to 4, it is characterized in that described pot galvanize comprises: control heating zone temperature is 700～780 ℃, and the polishing elongation control is 0.9～2.0%.
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| CN201310136069.2A CN103215495B (en) | 2013-04-18 | 2013-04-18 | Hot-dipped galvanized plate for side surrounding plate of washing machine and production method of hot-dipped galvanized plate |
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| CN201310136069.2A CN103215495B (en) | 2013-04-18 | 2013-04-18 | Hot-dipped galvanized plate for side surrounding plate of washing machine and production method of hot-dipped galvanized plate |
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| CN103215495B CN103215495B (en) | 2015-04-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521342A (en) * | 2016-12-19 | 2017-03-22 | 武汉钢铁股份有限公司 | Iron-zinc coated steel plate with yield strength being 130 MPa and production method thereof |
| CN108265230A (en) * | 2018-01-12 | 2018-07-10 | 唐山钢铁集团有限责任公司 | The high strength steel band and its production method of a kind of no timeliness of household electrical appliances |
| CN111996457A (en) * | 2020-08-27 | 2020-11-27 | 攀钢集团研究院有限公司 | Method for producing cold-rolled steel plate by low-temperature continuous annealing |
Citations (3)
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| JPS5757827A (en) * | 1980-09-26 | 1982-04-07 | Sumitomo Metal Ind Ltd | Production of alloyed hot-dipped galvanized steel plate |
| CN101255529A (en) * | 2008-03-06 | 2008-09-03 | 武汉钢铁(集团)公司 | High plastic-strain ratio galvanized steel sheet and production method |
| CN102732780A (en) * | 2012-06-18 | 2012-10-17 | 首钢总公司 | Hot galvanized plate used for refrigerator outer plate, and production method thereof |
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2013
- 2013-04-18 CN CN201310136069.2A patent/CN103215495B/en active Active
Patent Citations (3)
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|---|---|---|---|---|
| JPS5757827A (en) * | 1980-09-26 | 1982-04-07 | Sumitomo Metal Ind Ltd | Production of alloyed hot-dipped galvanized steel plate |
| CN101255529A (en) * | 2008-03-06 | 2008-09-03 | 武汉钢铁(集团)公司 | High plastic-strain ratio galvanized steel sheet and production method |
| CN102732780A (en) * | 2012-06-18 | 2012-10-17 | 首钢总公司 | Hot galvanized plate used for refrigerator outer plate, and production method thereof |
Non-Patent Citations (1)
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| 崔健: "宝钢家电用钢的现状与发展", 《冶金丛刊》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521342A (en) * | 2016-12-19 | 2017-03-22 | 武汉钢铁股份有限公司 | Iron-zinc coated steel plate with yield strength being 130 MPa and production method thereof |
| CN108265230A (en) * | 2018-01-12 | 2018-07-10 | 唐山钢铁集团有限责任公司 | The high strength steel band and its production method of a kind of no timeliness of household electrical appliances |
| CN111996457A (en) * | 2020-08-27 | 2020-11-27 | 攀钢集团研究院有限公司 | Method for producing cold-rolled steel plate by low-temperature continuous annealing |
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| CN103215495B (en) | 2015-04-22 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |