CN85100775A - Make the novel spring steel 28 manganese silicon boron steels of leaf springs of car - Google Patents
Make the novel spring steel 28 manganese silicon boron steels of leaf springs of car Download PDFInfo
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- CN85100775A CN85100775A CN 85100775 CN85100775A CN85100775A CN 85100775 A CN85100775 A CN 85100775A CN 85100775 CN85100775 CN 85100775 CN 85100775 A CN85100775 A CN 85100775A CN 85100775 A CN85100775 A CN 85100775A
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- steel
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- car
- leaf springs
- spring steel
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Abstract
A kind of spring steel 28MnSiB steel of making leaf springs of car is characterized in that through behind oil quenching, its through hardening band steel critical thickness can reach 16 millimeters; Through behind quenching-in water, its through hardening band steel critical thickness can reach 30 millimeters, can make thick cross section plate spring.The assembly stand life-span of 28MnSiB plate spring is above requiring more than 50% of life-span, and is the highest above 200%.In the system spring is produced,, can make the life-span of cold work tool improve twice because of the carbon content of this steel is low.
Description
The invention provides a kind of spring steel, especially for the 28MnSiB novel spring steel of making leaf springs of car.
The invention belongs to novel spring steel steel grade.
In known technology, what make leaf springs of car is that carbon content is 0.5～0.7% medium high carbon steel alloy.The steel grade in past is in the tempered sorbite state and uses behind quenching and high tempering.Because carbon content is higher, the back of quenching obtains needle type martensite, can only use oil quenching; For improving hardening capacity, make the spring in thicker cross section, need to add more alloying elements such as chromium, molybdenum, manganese or boron; If only use silicomanganese element alloyed, hardening capacity is lower; Because the high hot cold-forming property of carbon content is bad.
28MnSiB steel of the present invention, its composition are (weight ratio): carbon 0.24～0.32%, manganese 1.00～1.60%, silicon 0.60～1.20%, boron 0.001～0.005%.The sulphur phosphorus content is with generally closing the knot steel.This steel grade through 880～950 ℃ of quenchings (shrend or oil quenching) and low temperature (250～360 ℃) tempering after, under the tempered martensite state, use, its performance can reach yield strength 127 kgf/millimeters
2, tensile strength 148 kgf/millimeters
2, unit elongation 7%, relative reduction in area is more than 45%.The 28MnSiB band steel reaches 16 millimeters at the through hardening band steel critical thickness of oil quenching; Reach 30 millimeters through the through hardening band steel critical thickness behind quenching-in water.Can make thick taper leaf spring.
The 28MnSiB steel is low because of carbon content, hot and cold good processability, and its cold working is used in the production of system spring drift and die wear are little, and the life-span that can make tool is improved twice.
With the automobile leaf spring that the 28MnSiB steel is made, its rigidity and tension set meet the demands, and the assembly stand life-span is above requiring more than 50% of life-span, and is the highest above 200%.See Table 1,2.
Claims (2)
1, a kind of spring steel is characterized in that especially for the spring steel 28MnSiB steel of making leaf springs of car chemical ingredients is (weight ratio):
Carbon 0.24～0.32%, manganese 1.00～1.60%,
Silicon 0.60～1.20%, boron 0.001～0.005%.
2, its heat treating regime of spring steel 28MnSiB steel according to claim 1 is: 880～950 ℃ of quenchings (oil or water), 250～360 ℃ of tempering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100775 CN85100775A (en) | 1985-04-01 | 1985-04-01 | Make the novel spring steel 28 manganese silicon boron steels of leaf springs of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85100775 CN85100775A (en) | 1985-04-01 | 1985-04-01 | Make the novel spring steel 28 manganese silicon boron steels of leaf springs of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85100775A true CN85100775A (en) | 1986-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85100775 Pending CN85100775A (en) | 1985-04-01 | 1985-04-01 | Make the novel spring steel 28 manganese silicon boron steels of leaf springs of car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100775A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325010A (en) * | 2014-09-26 | 2015-02-04 | 无锡市天力五金弹簧厂 | Raw material and method for manufacturing brake shoe press spring |
| CN107587070A (en) * | 2017-09-15 | 2018-01-16 | 河钢股份有限公司承德分公司 | Hot rolling broadband leaf spring steel and its production method |
-
1985
- 1985-04-01 CN CN 85100775 patent/CN85100775A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325010A (en) * | 2014-09-26 | 2015-02-04 | 无锡市天力五金弹簧厂 | Raw material and method for manufacturing brake shoe press spring |
| CN107587070A (en) * | 2017-09-15 | 2018-01-16 | 河钢股份有限公司承德分公司 | Hot rolling broadband leaf spring steel and its production method |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |