CN86103009B - Air cooled medium high carbon manganese boron bainite steel - Google Patents
Air cooled medium high carbon manganese boron bainite steel Download PDFInfo
- Publication number
- CN86103009B CN86103009B CN86103009A CN86103009A CN86103009B CN 86103009 B CN86103009 B CN 86103009B CN 86103009 A CN86103009 A CN 86103009A CN 86103009 A CN86103009 A CN 86103009A CN 86103009 B CN86103009 B CN 86103009B
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- CN
- China
- Prior art keywords
- air cooling
- high carbon
- medium high
- present
- steel
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 229910001563 bainite Inorganic materials 0.000 title claims abstract description 4
- YHEXKHYQCQBLJR-UHFFFAOYSA-N [B].[Mn].[C] Chemical compound [B].[Mn].[C] YHEXKHYQCQBLJR-UHFFFAOYSA-N 0.000 title 1
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 3
- 239000011572 manganese Substances 0.000 claims abstract 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000203 mixture Substances 0.000 claims description 5
- 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 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000010791 quenching Methods 0.000 abstract description 2
- 230000000171 quenching effect Effects 0.000 abstract description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 abstract 1
- PALQHNLJJQMCIQ-UHFFFAOYSA-N boron;manganese Chemical compound [Mn]#B PALQHNLJJQMCIQ-UHFFFAOYSA-N 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 238000005275 alloying Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to air cooling manganese-boron bainitic steel with medium high carbon. Manganese and boron are used as main alloy elements. The smelting technology and the forge rolling technology are simple. After heat treatment, the air cooling is carried out so as to obtain a complex phase structure of bainite / martensite. The quenching working procedure can be omitted. The hardness HRc after air cooling is more than or equal to 50 or is more than or equal to 56. The present invention can be used for manufacturing various precise and complicated moulds, grinding balls, large racks, etc. The present invention has the advantages of high hardness and long service life, and has obvious economic benefit.
Description
The invention belongs to low-alloy die steel.
Manufacturing die cavity precision, complicated mould in most of the cases all uses without thermal treatment.Because heat treatment step will cause gross distortion, even cracking, cause workpiece to be scrapped.Low without heat treated mould hardness, not wear-resisting, the cavity dimension instability, and problems such as cut, pit easily in use appear, the life-span is very low.General terms of settlement is to adopt alloy tool steel to use through thermal treatment (as surfaces nitrided, pre-modified post-treatment etc.), but technology and economical effectiveness are not ideal enough.Except that taking above-mentioned way, also adopt a series of interalloies and high quality steel abroad, as the HB of the U.S., A2, D2, steel such as S7.This class steel air cooling hardens, but alloying element is many, and complex manufacturing costs an arm and a leg.
The objective of the invention is to develop the less air cooling medium high carbon bainitic steel of a kind of alloying element.
The present invention is with Mn, and B is as main alloy element, and air cooling obtains the bainite/martensite heterogeneous structure, and its composition can be:
1.C0.47～0.6%; Si0.5～1.5%; Mn2.1～3.5%; B0.0005～0.005%; Surplus is Fe.(weight %).
2. the preferable composition of this steel grade (by the purposes difference) is respectively:
(1) C 0.47～0.6%; Si0.5～1.5%; Mn 2.1～2.4%; B0.0005～0.005%; Surplus is Fe.(weight %)
(2) C 0.47～0.6%; Si 0.5～1.5%; Mn 2.6～3.2%; B 0.0005～0.005%; Surplus is Fe.(weight %)
3. on the mentioned component basis, add one or two or more kinds column element down:
W≤1.5%;Mo≤1%;Cr≤1.5%;V≤0.15%。(weight %)
This steel grade with electric arc furnace routinely technology smelt, water into steel ingot, through 1200 ℃ of forgings, roll after slow cooling become a useful person.Make rubber mold, air cooling after 900 ℃ of heating with the forging stock machining.HR
c〉=50, a
k〉=2.0kg-m/cm
2, deformation rate≤0.04% is not because of heat-treating.So workpiece deformation is little not easy to crack.
Make abrading-ball with steel of the present invention, air cooling is from hard (〉=HR
c52) can exempt quenching process, save the energy.Abrading-ball highly abrasion-resistant, percentage of damage are extremely low.This steel grade is used in tangible economic benefit on the engineering.
Make large-scale tooth bar with steel of the present invention, tooth face hardness can reach HR
c〉=56.
Enforcement steel grade of the present invention such as following table:
Claims (8)
1, a kind of medium high carbon air cooling Bei Shi steel is characterized in that with manganese, boron as main alloy element, air cooling obtains the bainite/martensite heterogeneous structure, and its composition is:
C 0.47～0.6%; Si 0.1～1.5%; Mn 2.1～3.5%; B 0.0005～0.005%; Surplus is Fe.(weight %).
2, by the described steel of claim 1, it is characterized in that composition can be:
C 0.47～0.6%; Si 0.5～1.5%; Mn 2.1～2.4%; B 0.0005～0.005%; Surplus is Fe.(weight %).
3, by the described steel of claim 1, it is characterized in that composition can be:
C 0.47～0.6%; Si 0.5～1.5%; Mn 2.6～3.2%; B 0.0005～0.005%; Surplus is Fe.(weight %).
4, by one of claim 1,2 and 3, described steel is characterized in that adding one or two or more kinds column element down:
W≤1.5%;Mo≤1%;Cr≤1.5%;V≤0.15%。(weight %).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103009A CN86103009B (en) | 1986-04-30 | 1986-04-30 | Air cooled medium high carbon manganese boron bainite steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86103009A CN86103009B (en) | 1986-04-30 | 1986-04-30 | Air cooled medium high carbon manganese boron bainite steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86103009B true CN86103009B (en) | 1987-02-04 |
| CN86103009A CN86103009A (en) | 1987-02-04 |
Family
ID=4801917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86103009A Expired CN86103009B (en) | 1986-04-30 | 1986-04-30 | Air cooled medium high carbon manganese boron bainite steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86103009B (en) |
-
1986
- 1986-04-30 CN CN86103009A patent/CN86103009B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86103009A (en) | 1987-02-04 |
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| GR02 | Examined patent application | ||
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