CN85108359A - A kind of easily machined low carbon steel that contains tellurium, sulphur - Google Patents
A kind of easily machined low carbon steel that contains tellurium, sulphur Download PDFInfo
- Publication number
- CN85108359A CN85108359A CN 85108359 CN85108359A CN85108359A CN 85108359 A CN85108359 A CN 85108359A CN 85108359 CN85108359 CN 85108359 CN 85108359 A CN85108359 A CN 85108359A CN 85108359 A CN85108359 A CN 85108359A
- Authority
- CN
- China
- Prior art keywords
- tellurium
- steel
- sulphur
- low carbon
- easily machined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 42
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 42
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000005864 Sulphur Substances 0.000 title claims abstract description 21
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 2
- 229910000975 Carbon steel Inorganic materials 0.000 claims 1
- 229910000915 Free machining steel Inorganic materials 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- VCTOKJRTAUILIH-UHFFFAOYSA-N manganese(2+);sulfide Chemical group [S-2].[Mn+2] VCTOKJRTAUILIH-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
A kind of easily machined low carbon steel that contains tellurium, sulphur, it is characterized in that the tellurium/sulphur proportioning in the steel is 0.07～0.13, oxygen level (by weight percentage, as follows) greater than 0.012, the composition range of steel is: carbon 0.07～0.25, manganese 0.8～2.0, silicon 0.01～0.15, sulphur 0.15～0.4, phosphorus 0.03～0.1, tellurium 0.01～0.05, oxygen 0.012～0.015, iron surplus.This free-cutting steel is not only because not leaded environmental pollution when avoiding smelting, and its hot workability is also good than general high sulfur free-cutting steel.
Description
The invention belongs to the technical field of ferrous alloy, a kind of lead-free easily machined low carbon steel promptly is provided.
Known free-cutting steel majority all is added with plumbous composition, thereby problem of environmental pollution can occur in smelting and hot procedure.
The invention provides a kind of easily machined low carbon steel of not leading, in the scope of the sulphur content of determining, control the form and the distribution of sulfide in the free-cutting steel with tellurium, oxygen level, make the sulfide in the steel have optimal shape, distribution and size, thereby make steel have good cutting ability.The easily machined low carbon steel that contains tellurium, sulphur provided by the present invention, compare with the easily machined low carbon steel of external leading, not only smelting technology is easy, has avoided environmental pollution, and the chip breaking when turning and when die-cut the smooth smooth situation in face of tool all have more significantly and improve; Compare with general high sulfur free-cutting steel, it has hot workability preferably.
The easily machined low carbon steel that contains tellurium, sulphur provided by the present invention, its composition range (calculating by weight percentage) is: carbon 0.07～0.25; Manganese 0.8～2.0; Silicon 0.01～0.15; Sulphur 0.15～0.4; Phosphorus 0.03～0.1; Tellurium 0.01～0.5; Oxygen 0.012～0.035; Iron surplus.Wherein the content of tellurium system controls by the proportioning of tellurium/sulphur＞0.07～0.13.Because our research work is found the maximum solid solution capacity of tellurium in manganese sulfide and is equivalent to the proportioning of tellurium/sulphur=0.07, this is just with the comparatively suitable ratio of tellurium control manganese sulfide form.Our research work shows when surpassing this ratio, then have a small amount of tellurium to precipitate in the outside of manganese sulfide with the form of tellurium manganese, and tellurium manganese is positioned at the front end of distortion manganese sulfide behind the steel heater.Though tellurium manganese is favourable to the cutting ability of steel, tellurium manganese is too much, and is harmful to the hot workability of steel, and increased the directivity of steel, and the price of tellurium is higher simultaneously, adds the production cost that tellurium has also increased steel.Oxygen level in the control steel also is to make free-cutting steel provided by the present invention have hot workability and the very important ring of cutting ability preferably, our research work shows, oxygen level in the steel should be greater than the 0.012(weight percent), if there not be the oxygen level that suits, add tellurium and can not guarantee that manganese sulfide is spherical in shape and separate out dispersedly; Oxygen level is low excessively to make manganese sulfide distribute along crystal boundary, thereby the hot workability of making and cutting ability degenerate.So the optimal components scope (calculating by weight percentage) that contains the easily machined low carbon steel of tellurium, sulphur provided by the present invention is:
Carbon 0.1～0.15 manganese 1.0～1.5
Silicon≤0.05 sulphur 0.28～0.35
Phosphorus 0.05～0.08 tellurium 0.025～0.035
Oxygen 0.017～0.024 iron surplus
The method that contains the easily machined low carbon steel of tellurium, sulphur with optimal oxygen level of control and tellurium content provided by the present invention makes manganese sulfide have good form and distribution, thereby guarantees that this steel grade has hot workability preferably.
The smelting technology of the easily machined low carbon steel that contains tellurium, sulphur provided by the present invention is identical with known free-cutting steel, and it all is suitable for the various type of furnaces.But in order to control suitable oxygen, silicone content, comparatively suitable with converter smelting, because converter smelting obtains low silicone content and higher oxygen level easily, sulphur and manganese then at the end add in blowing, and can replenish in ladle and adjust.Tellurium is more weak than iron with the avidity of oxygen, thus even directly insert in the molten steel, can not produce kickback with the form of pure tellurium yet, but the boiling point of tellurium is low, then is easy to gasification on the molten steel face if rest on, and preferably inserts in the molten steel with the form of tellurium manganese alloy.In the steel for fear of the existence of aluminum oxide, so forbid adding aluminium, the residual aluminium amount in the steel should be controlled at 100,000/several in.Behind the molten steel casting ingot-forming, preferably allow ingot slow cool, carry out making the form of manganese sulfide and distribution reach requirement fully to guarantee the reaction that forms manganese sulfide.
This steel grade when hot-work, soaking temperature suitable high (1300 ℃) before the cogging, soaking time should grow (being no less than 3 hours), the rolling-cogging temperature is～1250 ℃, finishing temperature～950 ℃, as if the employing hammer cogging, final forging temperature can be hanged down to 850 ℃.
The easily machined low carbon steel that contains tellurium, sulphur provided by the present invention also has an advantage, that be exactly steel scrap and steel cuttings when overweight refining, tellurium can most ofly reclaim, under the condition of basic slag, melt, recyclable approximately 75% tellurium melts under the condition of no slag, and the recovery of tellurium will be hanged down slightly.This point also is favourable for reducing the steel production cost.
Claims (3)
1, a kind of easily machined low carbon steel that contains tellurium, sulphur, it is characterized in that the tellurium/sulphur proportioning in the steel is 0.07～0.13, and its oxygen level (calculating by weight percentage, as follows) is greater than 0.012, the composition range of steel is: carbon 0.07～0.25, manganese 0.8～2.0, silicon 0.01～0.15, sulphur 0.15～0.4, phosphorus 0.03～0.1, tellurium 0.01～0.05, oxygen 0.012～0.035, iron level.
2, by the described easily machined low carbon steel of claim 1, it is characterized in that the optimal components scope is: carbon 0.1～0.15, manganese 1.0～1.5, silicon≤0.05, sulphur 0.28～0.35, phosphorus 0.05～0.08, tellurium 0.025～0.035 oxygen 0.017～0.024, iron surplus.
3, by claim 1,2 described easily machined low carbon steels, it is characterized in that the form that tellurium can pure tellurium directly adds in the molten steel, form that also can the tellurium manganese alloy adds in the molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108359 CN85108359A (en) | 1985-11-05 | 1985-11-05 | A kind of easily machined low carbon steel that contains tellurium, sulphur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85108359 CN85108359A (en) | 1985-11-05 | 1985-11-05 | A kind of easily machined low carbon steel that contains tellurium, sulphur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85108359A true CN85108359A (en) | 1987-05-13 |
Family
ID=4795993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85108359 Pending CN85108359A (en) | 1985-11-05 | 1985-11-05 | A kind of easily machined low carbon steel that contains tellurium, sulphur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85108359A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734427A (en) * | 2014-12-24 | 2016-07-06 | Posco公司 | Steel having excellent machinability and vibration damping ability and manufacturing method thereof |
| CN107287504A (en) * | 2017-06-16 | 2017-10-24 | 上海大学 | The middle carbon easy-cutting non-hardened and tempered steel and its manufacturing technique method of sulfur-bearing, tellurium |
| CN113913704A (en) * | 2021-12-13 | 2022-01-11 | 北京科技大学 | Tellurium-sulfur co-processed aluminum deoxidized steel and preparation method and application thereof |
-
1985
- 1985-11-05 CN CN 85108359 patent/CN85108359A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734427A (en) * | 2014-12-24 | 2016-07-06 | Posco公司 | Steel having excellent machinability and vibration damping ability and manufacturing method thereof |
| CN107287504A (en) * | 2017-06-16 | 2017-10-24 | 上海大学 | The middle carbon easy-cutting non-hardened and tempered steel and its manufacturing technique method of sulfur-bearing, tellurium |
| CN107287504B (en) * | 2017-06-16 | 2019-06-04 | 上海大学 | The middle carbon easy-cutting non-hardened and tempered steel and its manufacturing technique method of sulfur-bearing, tellurium |
| CN113913704A (en) * | 2021-12-13 | 2022-01-11 | 北京科技大学 | Tellurium-sulfur co-processed aluminum deoxidized steel and preparation method and application thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |