CN102747270A - Process for preparing extra-deep drawing interstitial-free (IF) steel {111}(110) textures - Google Patents
Process for preparing extra-deep drawing interstitial-free (IF) steel {111}(110) textures Download PDFInfo
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Abstract
The invention discloses a process for preparing extra-deep drawing IF steel {111}(110) textures and belongs to the technical field of micro-analysis of materials. A cold rolled sheet comprises, by weight, no more than 0.006% of C, no more than 0.02% of Si, no more than 0.25% of Mn, no more than 0.015% of P, no more than 0.006% of S, no less than 0.02% of all Al, no more than 0.02% of Ti, and the balance Fe and trace impurities which can not be detected. A cold rolling pretreatment process system comprises that the total rolling reduction is more than 76% and the single process rolling reduction is no less than 5%. An intermediate annealing process system comprises that the annealing temperature is 720 DEG C, the temperature is kept for 40-60 hours, and a sample is taken out for air cooling. A cold rolling process system comprises that the total rolling reduction is in a range of 60-96%, the single process rolling reduction is no less than 10%, and the system is finished in five processes. A short-cycle annealing process system comprises that the annealing temperature is 720 DEG C, the temperature is kept for 1-3 hours, and furnace cooling is conducted. The process has the advantages that extra-deep drawing steel textures treated by the process is sole in constituent and {111}(110) textures are principal textures. The deep drawing performance of plates and strips is excellent, the plastic strain ratio n is no less than 0.26, and the plastic strain ratio r can reach 2.2-4.2.
Description
Technical field
{ method of 111} < 110>texture belongs to the materials processing technology field to the invention discloses the ultra deep-draw IF of a kind of preparation steel.
Background technology
Extra-deep drawing steel is mainly used in industries such as automobile, enamel, household electrical appliances, electronics.Texture orientation and texture component are the deciding factors that influences plate, band deep drawability.In the cold rolling extra-deep drawing steel texture test result on α line and the γ line { 001} < 110 >, { 112} < 110 >, { 111} < 110 >, { 111} < 211>etc. is comparatively common texture component.Yet, plate, band that the desire acquisition has excellent deep drawability, must need the texture component that is beneficial to deep drawability increases, and is unfavorable for that the texture component of deep drawability reduces.According to the amount of literature data report, { 112} < 110>texture stability is the strongest in the extra-deep drawing steel.Yet, stability take second place { 111} < 110>texture is to realize the more favourable texture of ultra deep drawability.Of Chinese invention patent 92110519.3, obtain the r value through the texture pre-treatment and reach 3.5 extra-deep drawing steel, in the texture component so that { 111} texture is main, has reached producible in the world IF steel r value highest level.Along with the improvement of progress of science and technology and smelting technology means, it is imperative that production surmounts traditional ultra deep-draw IF steel.
The invention discloses the ultra deep-draw IF of a kind of preparation steel the method for 111} < 110>texture, through the control of cold rolling and annealing process, can obtain to help deep drawability and stability stronger { 111} < 110>texture, its r value reaches 2.2-4.2.
Summary of the invention
{ method of 111} < 110>texture to satisfy the market requirement of the ultra deep-draw of China with steel, obtains to have the extra-deep drawing steel of single texture component to the purpose of this invention is to provide the ultra deep-draw IF of a kind of preparation steel.
The present invention wants the technical scheme of technical solution problem to be: pickling raw material-cold rolling pre-treatment-process annealing-cold rolling-short-cycle annealing.
The chemical ingredients of the used steel billet of the present invention and content (weight percent) are: C≤0.006%, and Si≤0.02%, Mn≤0.25%, P≤0.015%, S≤0.006%, Alt>=0.02%, Ti≤0.02%, all the other are Fe and the trace impurity that can't detect.Cold rolling pretreatment technology system is: total reduction is greater than 76%, and the single pass draught is not less than 5%.The intermediate annealing process system is: annealing temperature is 720 ℃, and soaking time is 40-60 hour, takes out the sample air cooling.The cold-rolling process system is: the cold-rolling process total reduction is 60-96%, and the single pass draught is not less than 10%, divides five passages to accomplish.The short-cycle annealing process system is: annealing temperature is 720 ℃, furnace cooling after soaking time 1-3 hour.
The outstanding advantage of the present invention is comparatively single for the extra-deep drawing steel texture component after handling through aforesaid method, mainly so that { 111} < 110>texture is main.Plate, band deep drawability excellence, plastic strain ratio n >=0.26, plastic strain ratio r reaches 2.2-4.2.
Description of drawings
Fig. 1, Fig. 2 are that embodiment 1 corresponding α line and γ line is orientated the line texture pattern;
Fig. 3, Fig. 4 are that embodiment 2 corresponding α line and γ lines are orientated the line texture pattern.
Embodiment
Below in conjunction with embodiment the present invention is explained in detail.
Embodiment 1
The chemical ingredients and the weight percentage of ultra deep-draw IF steel cold rolled sheet are: C 0.004%, and Si 0.007%, and Mn 0.14%, and P 0.007%, and S 0.006%, and Ti 0.045%, and Nb 0.020%, and Alt 0.028%, and all the other are Fe and the trace impurity that can't detect.The cold-rolling process listed according to table 1 is rolled, and sheet gauge is cold-rolled to 0.325mm by 1mm.
Cold rolling pre-treatment total reduction is 78%, and minimum single pass draught is 8%.The process annealing temperature is 710 ℃, and soaking time is 50 hours, takes out the sample air cooling.The cold-rolling process system is: the cold-rolling process total reduction is 67.5%, and minimum single pass draught is 17.8%, divides five passages to accomplish.The short-cycle annealing temperature is 720 ℃, and soaking time is furnace cooling after 2.5 hours.Mechanical property detected value according to the IF steel sample after the above-mentioned second annealing art breading is seen table 2.Texture test result such as Fig. 1, shown in Figure 2.Because of α line and γ line in that { 111} < 110>locates to intersect, so the texture that obtains according to above-mentioned technology is so that { 111} < 110>is master's a single texture.
Table 1 cold-rolling process
| Sheet metal thickness mm | First passage | Second passage | The 3rd passage | Four-pass | The 5th passage | Finished product thickness mm |
| 1 | 26% | 19% | 18.3% | 19.4% | 17.8 | 0.325 |
Table 2 short-cycle annealing mechanical property and n, r value
| Direction | R P0.2/MPa | Rm/MPa | A% | n | r |
| Laterally | 105 | 309 | 60 | 0.29 | 2.51 |
| Eventually to | 107 | 313 | 51 | 0.28 | 2.32 |
| 45° | 106 | 309 | 56 | 0.27 | 3.33 |
The chemical ingredients and the weight percent content of ultra deep-draw IF steel cold rolled sheet are: C 0.004%, and Si 0.007%, and Mn 0.14%, and P 0.007%, and S 0.006%, and Ti 0.045%, and Nb 0.020%, and Alt 0.028%, and all the other are Fe and the trace impurity that can't detect.The cold-rolling process listed according to table 3 is rolled, and sheet gauge is cold-rolled to 0.38mm by 1mm.
Cold rolling pre-treatment total reduction is 75%, minimum single pass draught 7%.The process annealing temperature is 700 ℃, and soaking time is 50 hours, takes out the sample air cooling.The cold-rolling process system is: the cold-rolling process total reduction is 62%, and minimum single pass draught is 14%, divides five passages to accomplish.The short-cycle annealing temperature is 720 ℃, and soaking time is furnace cooling after 2.6 hours.Mechanical property detected value according to the IF steel sample after the above-mentioned second annealing art breading is seen table 4.Texture test result such as Fig. 3, shown in Figure 4.The texture that obtains according to above-mentioned technology is so that { 111} < 110>is master's a single texture equally.
Table 3 cold-rolling process
| Sheet metal thickness mm | First passage | Second passage | The 3rd passage | Four-pass | The 5th passage | Finished product thickness mm |
| 1 | 21% | 14% | 14.7% | 20.7% | 17.4% | 0.38 |
Table 4 short-cycle annealing mechanical property and n, r value test result
| Direction | R P0.2/MPa | Rm/MPa | A% | n | r |
| Laterally | 105 | 299 | 44.5 | 0.32 | 4.11 |
| Eventually to | 102 | 307 | 57.5 | 0.32 | 3.23 |
| 45° | 108 | 301 | 51.5 | 0.33 | 2.85 |
Claims (5)
1. a ultra deep-draw IF steel is characterized in that the chemical ingredients of steel and weight percent content are: C≤0.006%, Si≤0.02%; Mn≤0.25%, P≤0.015%, S≤0.006%; Alt>=0.02%, Ti≤0.02%, all the other are Fe and the trace impurity that can't detect.
According to claim 1 the ultra deep-draw IF of a kind of preparation steel of characteristic { method of 111} < 110>texture, it is characterized in that the cold rolling pretreatment technology system of said steel plate is: total reduction is greater than 76%, and the single pass draught is not less than 5%.
3. { method of 111} < 110>texture, it is characterized in that the intermediate annealing process system is: 720 ℃ of annealing temperatures, soaking time are 40-60 hour to the ultra deep-draw IF of a kind of preparation as claimed in claim 2 steel, take out the sample air cooling.
4. { method of 111} < 110>texture, it is characterized in that the cold-rolling process system is: cold rolling total reduction is 60-96% to the ultra deep-draw IF of a kind of preparation as claimed in claim 2 steel, and the single pass draught is not less than 10%, divides five passages to accomplish.
5. { method of 111} < 110>texture is characterized in that the short-cycle annealing process system is: 720 ℃ of annealing temperatures are incubated furnace cooling after 1-3 hour to the ultra deep-draw IF of a kind of preparation as claimed in claim 2 steel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022736A (en) * | 2018-08-06 | 2018-12-18 | 首钢集团有限公司 | A kind of cold-rolling process regulation method of gapless atomic steel continuous annealing thin plate |
| CN111676420A (en) * | 2020-05-12 | 2020-09-18 | 包头钢铁（集团）有限责任公司 | Television backboard for household appliances and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041166A (en) * | 1989-09-11 | 1991-08-20 | Kawasaki Steel Corporation | Cold-rolled steel sheet for deep drawing and method of producing the same |
| JPH05239555A (en) * | 1992-02-28 | 1993-09-17 | Kobe Steel Ltd | Production of cold rolled steel sheet for extra deep drawing |
| CN102586679A (en) * | 2012-03-22 | 2012-07-18 | 内蒙古包钢钢联股份有限公司 | Extra-deep drawing IF steel and annealing process thereof |
-
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- 2012-07-31 CN CN2012102680941A patent/CN102747270A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041166A (en) * | 1989-09-11 | 1991-08-20 | Kawasaki Steel Corporation | Cold-rolled steel sheet for deep drawing and method of producing the same |
| JPH05239555A (en) * | 1992-02-28 | 1993-09-17 | Kobe Steel Ltd | Production of cold rolled steel sheet for extra deep drawing |
| CN102586679A (en) * | 2012-03-22 | 2012-07-18 | 内蒙古包钢钢联股份有限公司 | Extra-deep drawing IF steel and annealing process thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022736A (en) * | 2018-08-06 | 2018-12-18 | 首钢集团有限公司 | A kind of cold-rolling process regulation method of gapless atomic steel continuous annealing thin plate |
| CN109022736B (en) * | 2018-08-06 | 2020-07-24 | 首钢集团有限公司 | Cold rolling process regulation and control method for interstitial free steel continuous annealing sheet |
| CN111676420A (en) * | 2020-05-12 | 2020-09-18 | 包头钢铁（集团）有限责任公司 | Television backboard for household appliances and manufacturing method thereof |
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Application publication date: 20121024 |