CN1166531A - Production technology of cold-rolled plate for automobile friction sheets - Google Patents
Production technology of cold-rolled plate for automobile friction sheets Download PDFInfo
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- CN1166531A CN1166531A CN 96115338 CN96115338A CN1166531A CN 1166531 A CN1166531 A CN 1166531A CN 96115338 CN96115338 CN 96115338 CN 96115338 A CN96115338 A CN 96115338A CN 1166531 A CN1166531 A CN 1166531A
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Abstract
The present invention adopts low compression ratio rolling technology together with low temperature heat treatment, low temperature tapping and accurate levelling elongation coefficient to ensure the excellent properties of said cold rolled plate. When the finished plate thickness is 1.5-2.5mm, the compression ratio is 33-42%, specific draft loss each step is not greater than 15% and decremental, rolling emulsion density and tension are increased, annealing temperature is 550-580 deg.C, tapping temperature is lower than 90 deg.C, and levelling elongation coefficient is 1.2-2.0%. The said technological process results in high surface quality, high size accuracy and high comprehensive material utilizing rate.
Description
The invention belongs to the steel rolling production field, particularly a kind of technology of producing cold-rolled plate for automobile friction sheets.
The steel plate that the production automobile friction is used has required good surface quality, dimensional precision, mechanical property and surface hardness etc.Conventional production process has higher compression ratio (＞60%), rolling emulsion concentration lower (about 2%), and annealing temperature is higher, is generally 650～700 ℃, and tapping temperature is generally 110～120 ℃.Adopt common process to be difficult to produce the cold-rolled steel sheet that satisfactory production automobile friction is used.
The purpose of this invention is to provide a kind of technology that adopts the production cold-rolled plate for automobile friction sheets that features such as small reduction ratio, rolling, the little reduction in pass of multi-pass, high emulsion concentration, low-temperature annealing, middling speed heating, low temperature are come out of the stove, medium unit elongation form, to produce the production cold-rolled plate for automobile friction sheets that conforms to quality requirements, finished product rate is high.
According to the present invention, rolling technology, heat treating regime and smooth unit elongation are optimized, and correspondingly carry out rational Match, to produce high standard automobile friction steel plate.
Generally with No. 45 steel rollings, the composition weight percent of this steel is automobile friction with steel plate: C=0.42～0.50, and Si=0.17～0.37, Mn=0.50～0.80, P≤0.035, Ni≤0.25, Cr≤0.25, surplus is an iron.
For rolling technology, heat treating regime and smooth unit elongation are optimized, and make it rational Match according to production cold-rolled plate for automobile friction sheets technology of the present invention.
1) adopt the small reduction ratio steel rolling process, when requiring finished product thickness to be 1.5～2.5mm, compression ratio is 33～42%, and multi-pass is rolling, and each percentage pass reduction is not more than 15%, and reduces successively.
2) rolling emulsion concentration is increased to 4.5～5.5% by 2.0%.
3) rolling tensile force generally increases by 0.8～1.2kN/mm
2
4) adopt low-temperature annealing, the low temperature technology of coming out of the stove, annealing temperature is 550～580 ℃, and be 5.5～6.5 hours heat-up time, tapping temperature＜90 ℃.
5) guarantee smooth accurately unit elongation, when requiring finished product thickness to be 1.5～2.5mm, the unit elongation scope is 1.2～2.0%, thickness and precision is ± 0.05mm in.
No. 45 steel finished product thickness 1.5～2.5mm can be optimized for two group distances, it is 1.5～1.9mm that I forms product thickness, and it is 2.0～2.5mm that II forms product thickness, and the compression ratio of I group is 40～42%, and annealing temperature is 580 ℃, and unit elongation is 1.2～1.7%.Corresponding finished product thickness optimization raw thickness and compression ratio.
When requiring finished product thickness to be 1.6mm, compression ratio is 41.82%, and promptly adopting raw thickness is 2.75mm.
When requiring finished product thickness to be 1.8mm, compression ratio is 40.0%, and promptly adopting raw thickness is 3.0mm.
Finished product thickness is that the compression ratio of the II group of 2.0～2.5mm is 33～35%, and annealing temperature is 550 ℃, and unit elongation is 1.5～2.0%.
When requiring finished product thickness to be 2.0mm, compression ratio is 33.3%, is 3.0mm with raw thickness promptly.
When requiring finished product thickness to be 2.3mm, compression ratio is 34.3%, is 3.50mm with raw thickness promptly.
According to the present invention, annealing temperature and rolling compression ratio are complementary, and adopt the low-temperature heat treatment system to make grain structure become globular pearlite.Require to guarantee to handle the purity of shielding gas hydrogen in the stove simultaneously, low temperature is come out of the stove and can be guaranteed no Decarburized layer.
Guarantee when smooth that unit elongation is accurate, make surface hardness even, reach 86～96 (HRB), make the finished product thickness tolerance in ± 0.05mm.
When producing according to technology of the present invention, finished product rate reaches 76.15%, exceeds more than 2.0% than the lumber recovery of general technology.
Claims (7)
1, the technology of No. 45 steel production of a kind of usefulness cold-rolled plate for automobile friction sheets is characterized in that rolling technology, heat treating regime and smooth unit elongation are optimized, and makes it rational Match, that is:
1) adopt the small reduction ratio steel rolling process, when requiring finished product thickness to be 1.5～2.5mm, compression ratio is 33～42%, and multi-pass is rolling, and each percentage pass reduction is not more than 15%, and reduces successively,
2) rolling emulsion concentration is increased to 4.5～5.5% by 2.0%,
3) rolling tensile force generally increases by 0.8～1.2kN/mm
2,
4) adopt low-temperature annealing, the low temperature technology of coming out of the stove, annealing temperature is 550～580 ℃, 5.5～6.5 hours heat-up times, and tapping temperature＜90 ℃,
5) guarantee smooth accurately unit elongation, when requiring finished product thickness to be 1.5～2.5mm, the unit elongation scope is 1.2～2.0%.
2, according to the technology of the production cold-rolled plate for automobile friction sheets of claim 1, it is characterized in that when requiring finished product thickness to be 1.5～1.9mm, compression ratio is 40～42%, annealing temperature is 580 ℃, and unit elongation is 1.2～1.7%.
3, the technology of the cold-rolled steel sheet of using according to the production automobile friction of claim 1 or 2 is characterized in that when requiring finished product thickness to be 1.6mm, compression ratio is 41.82%, and promptly adopting raw thickness is 2.75mm.
4, according to the technology of the production cold-rolled plate for automobile friction sheets of claim 1 or 2, it is characterized in that when requiring finished product thickness to be 1.8mm, compression ratio is 40.0%, promptly adopting raw thickness is 3.0mm.
5, according to the technology of the production cold-rolled plate for automobile friction sheets of claim 1, it is characterized in that when requiring finished product thickness to be 2.0～2.5mm, compression ratio is 33～35%, annealing temperature is 550 ℃, and unit elongation is 1.5～2.0%.
6, according to the production cold-rolled plate for automobile friction sheets of claim 1 or 5, it is characterized in that when requiring finished product thickness to be 2.0mm, compression ratio is 33.3%, be 3.0mm promptly with raw thickness.
7, according to the technology of the production cold-rolled plate for automobile friction sheets of claim 1 or 5, it is characterized in that when requiring finished product thickness to be 2.3mm, compression ratio is 34.3%, is 3.50mm with raw thickness promptly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115338A CN1055504C (en) | 1996-05-23 | 1996-05-23 | Production technology of cold-rolled plate for automobile friction sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115338A CN1055504C (en) | 1996-05-23 | 1996-05-23 | Production technology of cold-rolled plate for automobile friction sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1166531A true CN1166531A (en) | 1997-12-03 |
| CN1055504C CN1055504C (en) | 2000-08-16 |
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ID=5122607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96115338A Expired - Fee Related CN1055504C (en) | 1996-05-23 | 1996-05-23 | Production technology of cold-rolled plate for automobile friction sheets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1055504C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586279A (en) * | 2012-08-17 | 2014-02-19 | 宝山钢铁股份有限公司 | Production method of cold-rolled steel sheet for automobile friction plates |
| CN104084424A (en) * | 2014-06-23 | 2014-10-08 | 梧州恒声电子科技有限公司 | Control method for cold-rolled steel plate |
| CN104084423A (en) * | 2014-06-23 | 2014-10-08 | 梧州恒声电子科技有限公司 | Cold-rolled steel plate control method |
| CN109351828A (en) * | 2018-10-09 | 2019-02-19 | 苏州翔楼新材料股份有限公司 | A kind of automobile gearbox friction plate material preparation process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113123A (en) * | 1982-12-17 | 1984-06-29 | Kawasaki Steel Corp | Production of ultra-hard extra-thin cold rolled steel sheet |
-
1996
- 1996-05-23 CN CN96115338A patent/CN1055504C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586279A (en) * | 2012-08-17 | 2014-02-19 | 宝山钢铁股份有限公司 | Production method of cold-rolled steel sheet for automobile friction plates |
| CN103586279B (en) * | 2012-08-17 | 2015-12-02 | 宝山钢铁股份有限公司 | A kind of production method of cold-rolled plate for automobile friction sheets |
| CN104084424A (en) * | 2014-06-23 | 2014-10-08 | 梧州恒声电子科技有限公司 | Control method for cold-rolled steel plate |
| CN104084423A (en) * | 2014-06-23 | 2014-10-08 | 梧州恒声电子科技有限公司 | Cold-rolled steel plate control method |
| CN109351828A (en) * | 2018-10-09 | 2019-02-19 | 苏州翔楼新材料股份有限公司 | A kind of automobile gearbox friction plate material preparation process |
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| Publication number | Publication date |
|---|---|
| CN1055504C (en) | 2000-08-16 |
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