CN103205629A - High-hardness steel belt for home appliances and manufacturing method - Google Patents
High-hardness steel belt for home appliances and manufacturing method Download PDFInfo
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- CN103205629A CN103205629A CN2013100983501A CN201310098350A CN103205629A CN 103205629 A CN103205629 A CN 103205629A CN 2013100983501 A CN2013100983501 A CN 2013100983501A CN 201310098350 A CN201310098350 A CN 201310098350A CN 103205629 A CN103205629 A CN 103205629A
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Abstract
The invention provides a high-hardness steel belt for home appliances. The chemical component of the high-hardness steel belt includes, by mass, 0.06%<=C<=0.13%, 0.03%<=Si<=0.25%, 0.2%<=Mn<=0.4%, 0%<P<0.025%, 0%<S<0.025%, 0.01%<=Al<=0.05%, and the balance of Fe. After many tests and tries, the high-hardness steel belt completely meets quality requirements for strength, hardness and elongation of high-hardness steel for side plates of refrigerators, is quite popular with customers, and has high popularization and application values and wide prospect since cold-rolled steel belts for home appliances are quite wide in development prospect.
Description
(1) technical field
The present invention relates to a kind of household electrical appliances high rigidity (LJD) steel band and manufacture method.
(2) background technology
Household electrical appliances industry is the emerging industry that reform and opening-up forms afterwards, along with the go to the countryside implementation of policy of household electrical appliances several years ago, domestic demand market particularly rural market demand is vigorous, the cold-rolled steel strip of production household appliances also has different according to the difference of its corresponding household appliances greatly to plate property and surperficial requirement, require to have higher hardness and corresponding surface treatment as refrigerator side plate, backboard, because household electrical appliances are directly also higher to plate face specification of quality as the outward appearance event of the finished product with steel, can not there be macroscopic defective in single face in addition.
According to a large amount of investigation data to the client, determine that refrigerator side plate class high rigidity with the demand of steel to steel band is:
Defectives such as common cold-rolled steel strip is not enough because of its hardness, surface treatment is bad can not satisfy produces the specification of quality that household electrical appliances are used steel.
(3) summary of the invention
The object of the invention provides a kind of household electrical appliances high rigidity steel band and manufacture method thereof of specification of quality of satisfied production household appliances.
The technical solution used in the present invention is:
A kind of household electrical appliances high rigidity steel band, its chemical ingredients mass content is as follows:
0.06%≤C≤0.13%；0.03%≤Si≤0.25%；0.2%≤Mn≤0.4%；
0%＜P≤0.025%；0%＜S≤0.025%；0.01%≤Al≤0.05%；
Surplus is Fe; The unavoidable impurities that wherein also may contain trace;
Its thickness is 0.4～0.5mm, and width is 930～1390mm, surface roughness Ra=0.8～1.5 μ m.
Preferably, its chemical ingredients mass content is as follows:
0.07%≤C≤0.10%；0.09%≤Si≤0.13%；0.25%≤Mn≤0.28%；
0.016%≤P≤0.02%；0.014%≤S≤0.015%；0.015%≤Al≤0.025%；
Surplus is Fe.
The invention still further relates to the described household electrical appliances manufacture method of high rigidity steel band, described method comprises:
(1) hot rolling:
Hot rolling material chemical component mass content is as follows:
0.06%≤C≤0.13%；0.03%≤Si≤0.25%；0.2%≤Mn≤0.4%；
0%＜P≤0.025%；0%＜S≤0.025%；0.01%≤Al≤0.05%；
Surplus is Fe; The unavoidable impurities that wherein also may contain trace;
The hot fine rolling finishing temperature is 870 ± 20 ℃, and the finish to gauge coiling temperature is 650 ± 20 ℃; With 7%～17% chlorohydric acid pickling remove the surface iron scale after carry out next step cold rolling manipulation;
(2) cold rolling:
Adopt two-shipper frame reversable mill to be rolled; This unit is equipped with a complete set of Siemens field bus control system, can realize that omnidistance PLC controls automatically; Unit has all-hydraulic depressing, and hydraulic AGC is controlled automatically; Unit configuration plate profile instrument adopts X line thickness tester, and the high-resolution camera head of online observation plate surface quality, guarantees that the steel band precision and the template that shut out reach first-class level, through actual detected thickness of strips precision at ± 5 μ m.
Carry out next step annealing operation after the degreasing; Degreasing adopts vertical electrolytic degreasing unit to carry out;
(3) annealing:
Be warming up to 400 ℃～450 ℃ insulations 4 hours, be warming up to 665 ℃ of insulations 6 hours again, 335 ℃ of sprays are come out of the stove for 80 ℃; Annealing adopts the perhydro bell furnace to carry out;
(4) smooth:
Adopt and to depress technology greatly and carry out, smooth roll in advance ball blast to roughness Ra=3 μ m.For the unit elongation that guarantees hardness and the smooth employing 2% of plate surface evenness roughness is depressed output steel strip surface Ra=0.8～1.5 μ m.For guaranteeing that the plate face does not occur being pressed into the surface imperfection of bringing because of foreign material, unit must carry out comprehensive cleaning before production simultaneously.
Preferably, hot rolling material chemical component mass content is as follows:
0.07%≤C≤0.10%；0.09%≤Si≤0.13%；0.25%≤Mn≤0.28%；
0.016%≤P≤0.02%；0.014%≤S≤0.015%；0.015%≤Al≤0.025%；
Surplus is Fe.
The present invention selects special hot rolled strip for use, makes strict demand at composition and hot rolling technology, adopts the whole world state-of-the-art two-shipper frame reversable mill rolling, and supporting siemens electrical control system has guaranteed the thickness and precision of steel band; Adopt vertical electrolytic degreasing unit to clean, guarantee plate face degree of cleaning, avoid plate face foreign matter to be pressed into; Develop at specific perhydro annealing process and the flattening process of household electrical appliances with high rigidity steel band performance requriements, the finished product detected result meet customer need target value more than 95%, become the example of technical progress of industry, promote the progress of domestic and international cold-rolled steel strip rolling technology, the starting material of high-quality are provided for the downstream client.
The steel band specification of quality:
1) steel band mechanical property:
Horizontal sample is got in the steel band tension test, and mechanical property need meet the following table regulation:
2) slip line
Assurance is dispatched from the factory and slip line do not occurred in back 3 months.
3) surface quality
Steel strip surface must not scab, crackle, drawing crack, be mingled with, iron scale, iron rust and layering, blue oxidation tint and yellow film phenomenon have not been allowed, allow the defective that do not influence formability and be coated with, plate sticking power, as small bubbles, little cut, little roll marks, slightly scratch and oxidation tint etc. allows to exist.
Beneficial effect of the present invention is mainly reflected in:
(1) hot rolling raw material Chemical Composition adopts composition design in accordance with regulations to produce, and guarantees cold rolled annealed back steel plate hardness and bending;
(2) adopt the advanced two-shipper frame reversable mill of configuration rolling, guarantee thickness and precision;
(3) adopt vertical electrolytic degreasing unit to clean, guarantee plate face degree of cleaning;
(4) adopt specific perhydro annealing process annealing, smooth roll adopts the ball blast technology, and the roll roughness is about 3 μ m, and flat back plate surface roughness is between 0.7～1.5 μ m, and technology is depressed in smooth employing greatly at LJD;
Household electrical appliances of the present invention have fully satisfied refrigerator side plate class high rigidity specification of quality with intensity, hardness and the unit elongation of steel through test of many times with trying out with the high rigidity steel band, be subjected at present enjoying great popularity of client, because household electrical appliances are boundless with the cold-rolled steel strip development prospect, therefore it has application value, and prospect is very wide.
(4) description of drawings
The typical metallographic structure of high rigidity steel band of Fig. 1 household electrical appliances of the present invention.
(5) embodiment
The present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is not limited in this:
Embodiment 1:
(1) hot rolling:
Hot rolling raw material composition sees the following form:
| Sequence number | C | Si | Mn | P | S | Al |
| 1 | 0.07 | 0.12 | 0.28 | 0.018 | 0.015 | 0.015 |
| 2 | 0.1 | 0.09 | 0.25 | 0.019 | 0.014 | 0.02 |
| 3 | 0.07 | 0.13 | 0.27 | 0.016 | 0.015 | 0.023 |
Surplus is the unavoidable impurities of Fe and trace;
The hot fine rolling finishing temperature is 870 ± 20 ℃, and the finish to gauge coiling temperature is 650 ± 20 ℃;
(2) pickling
Coils of hot-rolled steel adopts chlorohydric acid pickling through the pickling of plug-type shallow slot turbulent flow pickling unit, and concentration of hydrochloric acid is controlled between 7%～17%(w/w), removes scale on surface.
(3) cold rolling
Coil of strip is rolling through two-shipper frame reversable mill after the pickling;
(4) vertical electrolysis unit degreasing: Faradaic current is controlled about 3000A, guarantees that plate face grease all washes, and adopts small tension receiving coil to batch.
(5) annealing:
The perhydro bell furnace is adopted in annealing, anneals by following setting technology:
| Annealing process control parameter name | The parameters controlling valu |
| Steel grade | LJD |
| Thickness (mm) | 0.4～0.5 |
| Width (mm) | 930～1390 |
| Batch (T) | 80～95 |
| First section intensification | Heating at full speed |
| First section insulation platform (℃) | 400～450 |
| First section soaking time (h) | 4 |
| Second period heating time spent (h) | 8 |
| Second section holding temperature (℃) | 665 |
| Second section soaking time (h) | 6 |
| The spray temperature (℃) | 335 |
| Tapping temperature (℃) | 80 |
(5) smooth:
Employing is depressed technology greatly and is carried out, the smooth elongation control of conventional products is below 1.5%, produce these type of household electrical appliances and be set in 2% with the steel unit elongation, simultaneously smooth roll in advance ball blast to roughness Ra=3 μ m, batch by rewinding unit dab oil small tension receiving coil, the part steel band is by customer demand spermatophore delivery behind slitting line itemize cutting plate.
Make the steel band quality examination:
1) steel band mechanical property: horizontal sample is got in the steel band tension test, and mechanical property is as follows:
2) slip line dispatches from the factory and slip line do not occur in back 3 months.
3) surface quality
Steel strip surface do not have scab, crackle, drawing crack, be mingled with, iron scale, iron rust and layering, do not have blue oxidation tint and yellow film phenomenon.
4) metallographic structure
Make 1# sample household electrical appliances and use the typical metallographic structure of steel band LJD referring to Fig. 1, this is organized as ferrite+free cementite, 10 grades of grain fineness numbers.
Claims (4)
1. household electrical appliances high rigidity steel band, its chemical ingredients mass content is as follows:
0.06%≤C≤0.13%；0.03%≤Si≤0.25%；0.2%≤Mn≤0.4%；
0%＜P≤0.025%；0%＜S≤0.025%；0%＜Al≤0.05%；
Surplus is Fe;
Its thickness is 0.4～0.5mm, and width is 930～1390mm, surface roughness Ra=0.8～1.5 μ m.
2. household electrical appliances as claimed in claim 1 high rigidity steel band is characterized in that its chemical ingredients mass content is as follows:
0.07%≤C≤0.10%；0.09%≤Si≤0.13%；0.25%≤Mn≤0.28%；
0.016%≤P≤0.02%；0.014%≤S≤0.015%；0.015%≤Al≤0.025%；
Surplus is Fe.
3. the described household electrical appliances of claim 1 are with the manufacture method of high rigidity steel band, and described method comprises:
(1) hot rolling:
Hot rolling material chemical component mass content is as follows:
0.06%≤C≤0.13%；0.03%≤Si≤0.25%；0.2%≤Mn≤0.4%；
0%＜P≤0.025%；0%＜S≤0.025%；0%＜Al≤0.05%；
Surplus is Fe;
The hot fine rolling finishing temperature is 870 ± 20 ℃, and the finish to gauge coiling temperature is 650 ± 20 ℃; With carrying out next step cold rolling manipulation behind 7%～17% chlorohydric acid pickling;
(2) cold rolling:
Adopt two-shipper frame reversable mill to be rolled;
Carry out next step annealing operation after the degreasing;
(3) annealing:
Be warming up to 400 ℃～450 ℃ insulations 4 hours, be warming up to 665 ℃ of insulations 6 hours again, 335 ℃ of sprays are come out of the stove for 80 ℃;
(4) smooth:
Adopt and to depress technology greatly and carry out, smooth roll in advance ball blast to roughness Ra=3 μ m.
4. method as claimed in claim 3 is characterized in that hot rolling material chemical component mass content is as follows:
0.07%≤C≤0.10%；0.09%≤Si≤0.13%；0.25%≤Mn≤0.28%；
0.016%≤P≤0.02%；0.014%≤S≤0.015%；0.015%≤Al≤0.025%；
Surplus is Fe.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924152A (en) * | 2014-04-22 | 2014-07-16 | 迁安轧一钢铁集团有限公司 | Method for producing hot-rolled steel strips |
| CN104043653A (en) * | 2014-06-23 | 2014-09-17 | 梧州恒声电子科技有限公司 | Control process for cold rolling steel plates |
| CN105506469A (en) * | 2014-09-25 | 2016-04-20 | 上海梅山钢铁股份有限公司 | Anti-stamping-distortion aluminum-and-zinc-plated steel and production method thereof |
| CN106191651A (en) * | 2016-08-10 | 2016-12-07 | 邢台钢铁有限责任公司 | A kind of automatic binding reinforcing bar steel and the production method of wire rod thereof |
| CN107587089A (en) * | 2017-07-19 | 2018-01-16 | 宝钢集团新疆八钢铁有限公司 | A kind of technique for eliminating zinc-plated door-plate steel surface straightening line |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924152A (en) * | 2014-04-22 | 2014-07-16 | 迁安轧一钢铁集团有限公司 | Method for producing hot-rolled steel strips |
| CN104043653A (en) * | 2014-06-23 | 2014-09-17 | 梧州恒声电子科技有限公司 | Control process for cold rolling steel plates |
| CN105506469A (en) * | 2014-09-25 | 2016-04-20 | 上海梅山钢铁股份有限公司 | Anti-stamping-distortion aluminum-and-zinc-plated steel and production method thereof |
| CN105506469B (en) * | 2014-09-25 | 2017-05-24 | 上海梅山钢铁股份有限公司 | Anti-stamping-distortion aluminum-and-zinc-plated steel and production method thereof |
| CN106191651A (en) * | 2016-08-10 | 2016-12-07 | 邢台钢铁有限责任公司 | A kind of automatic binding reinforcing bar steel and the production method of wire rod thereof |
| CN106191651B (en) * | 2016-08-10 | 2018-05-08 | 邢台钢铁有限责任公司 | A kind of production method of automatic binding reinforcing bar steel and its wire rod |
| CN107587089A (en) * | 2017-07-19 | 2018-01-16 | 宝钢集团新疆八钢铁有限公司 | A kind of technique for eliminating zinc-plated door-plate steel surface straightening line |
| CN107587089B (en) * | 2017-07-19 | 2021-05-28 | 新疆八一钢铁股份有限公司 | Process for eliminating withdrawal and straightening lines on surface of galvanized door sheet steel |
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Application publication date: 20130717 |