CN1056902A - Maraging steel - Google Patents
Maraging steel Download PDFInfo
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- CN1056902A CN1056902A CN91104461A CN91104461A CN1056902A CN 1056902 A CN1056902 A CN 1056902A CN 91104461 A CN91104461 A CN 91104461A CN 91104461 A CN91104461 A CN 91104461A CN 1056902 A CN1056902 A CN 1056902A
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Abstract
The invention belongs to field of alloy steel.It is the elastic maraging steel of a kind of high loading.
The present invention is the basis according to 18Ni (300), 18Ni (350) two steel grades, its composition has been carried out rational adjustment, and added the RE element, made that steel of the present invention has obdurability, elastic limit all increases, characteristics such as the linear relationship in the elastic range is good, and the little and processing performance of elastic lag is good.
Description
The invention belongs to field of alloy steel.Be applicable to iron-based Ni-Co-Mo-Ti class elasticity maraging steel.
As the contour loading elasticity sensor of superhigh pressure sensor, then require material to have very high yield strength and fracture toughness property, and the favorable manufacturability energy.The elasticity martensitic aging steel that is used at present this field both at home and abroad mainly is 18Ni(300) and 18Ni(350) two kinds.And 18Ni(300) the steel actual strength is on the low side, the 1790MPa of its σ 0.2 lower value; Though 18Ni(350) intensity height, the Klc value is lower, generally at 35MPa
About.Japan's special permission discloses clear 54-162616 and introduces a kind of semi-rigid magnetite material, and this material is applicable to the half-hard magnetic material of manufacturing the hysteresis machine rotor, its σ b≤190kgf/mm
2(about 1862MPa), but do not have the Klc data, be not suitable for the high loading elastic element.Clear in addition 57-16116 introduces a kind of being suitable for and makes the material that mould, axletree and other transmission shaft are used, and improves the material surface performance by shot peening.This material and purposes of the present invention differ far away, and do not provide corresponding correlation data, therefore the high loading elastic sensing element of inapplicable manufactured size precision.
The objective of the invention is to make that a kind of to have an obdurability good, elastic limit is high, and elastic lag is little, in elastic range internal linear elasticity maraging steel that be on speaking terms and good manufacturability.
According to the object of the invention, we adopt iron-based Ni-Co-Mo-Ti is maraging steel, and adds the proper amount of rare-earth element, to improve the obdurability of steel, obtains a kind of novel snappiness maraging steel.The concrete chemical ingredients (weight %) of steel of the present invention be C≤0.02%Ni 17.5～18.5% Co 9.5～10.5% Mo 4.0～4.5% Ti 1.0～1.2% Al 0.05～0.15% Si≤0.10% Mn≤0.10% S≤0.008% P≤0.008% RE 0.005～0.015% all the other be Fe.
Steel of the present invention forms intermetallic compound by alloying elements such as Mo, Ti and strengthens in the Fe-Ni martensitic matrix.C is harmful element in steel, and it can make matrix toughness descend, and also generates TiC or Ti(C, N with Ti) etc. mutually harmful, significantly reduce the toughness of steel.Therefore C is low more good more, and C content is≤0.02% in steel of the present invention.Ni guarantees steel flexible important element, and when Ni content was lower than 10%, the toughness of steel significantly reduced.Ti, Mo are all with Ni during timeliness
3Ti, Ni
3Mo intermetallic compound form exists.The formation of these two kinds of strengthening phases all can consume Ni, so Ni content is lower than at 17% o'clock and just is difficult to guarantee that Ni content reaches more than 10% in the matrix in the steel.Ni is again the element that reduces martensite point, when Ni content is higher than 21%, after the solution treatment martensitic transformation incomplete, the part residual austenite is arranged, the strength degradation of steel.Therefore Ni content should be 17.5～18.5%.The main effect of Co in steel has three; 1. reduce the solubleness of Mo in steel, promote to contain the separating out of intermetallic compound of Mo, increase with the Co amount, the intensity of steel is enhanced.2. improve the Ms point, guarantee to obtain full martensitic stucture after the steel solid solution.3. improve martensitic stability, and make substructure remain to higher intensity, thus the anti-overaging ability of raising steel.In order to improve the intensity of steel, steel Co content of the present invention is 9.5～10.5%.Mo, Ti are the strengthening elements of steel of the present invention.After the timeliness in the steel Ti almost all form the Ni3Ti intermetallic compound strengthening phase of disperse, and Mo can prevent that Ni3Ti from separating out on crystal.Mo can improve the intensity of steel and improve the toughness of steel, but the Mo too high levels occur compound between metal remained after the solid solution easily, so Mo content is at 4-5%.Ti increases then with content that intensity increases in steel, but then can reduce with the toughness that Ti content increases steel, and the easy segregation of composition, and Ti content is 1.0～1.2% in steel of the present invention.Al adds as reductor in steel of the present invention, and its add-on is 0.05～0.15%.RE is not only further deoxidation, desulfurization in steel of the present invention, improve steel inclusion form and distribution, and can improve the toughness of steel, especially more obvious to fracture toughness property Klc, therefore RE is a bioelement in steel of the present invention, and its content is 0.005～0.015%.Mn, Si all belong to harmful element in steel of the present invention, they form oxide inclusion easily in steel, so its content all is not more than 0.10%.
Steel of the present invention can be smelted in vacuum induction furnace, about 1550 ℃ of fine melt temperature, and about 1600 ℃ of refining temperature, about 1540 ℃ of tapping temperature, vacuum tightness is 3 * 10 during steel-making
-3More than the mmHg post.Steel ingot is after high temperature homogenization annealing, and opening and forging temperature is 1100 ℃, stops forging temperature 〉=800 ℃.
Steel of the present invention compared with prior art, it is good to have an obdurability, elastic limit height, characteristics such as the linear relationship in the elastic range is good, and the little and processing performance of elastic lag is good.Be a kind of good combination property, the elasticity maraging steel that is suitable for making high loading elasticity components and parts.
Embodiment
Chemical ingredients scope according to steel of the present invention, the four stove steel that adopted vacuum induction furnace smelting, its chemical ingredients sees Table 1, steel ingot through 1200 ℃ of heating homogenize handle after, forge into bar in 1100 ℃～900 ℃ temperature ranges, mechanical property test after heat treatment the results are shown in Table 2.In order to contrast conveniently, also smelted 18Ni(300 simultaneously) and 18Ni(350) two steel grades, its working method is with preceding identical, and component content and mechanical property are also all listed in table 1, the table 2.
Claims (1)
1, a kind of elasticity maraging steel, all the other are Fe to the concrete chemical ingredients that it is characterized in that this steel for (weight %): C≤0.02%Ni17.5～18.5%Co9.5～10.5%Mn4.0～5.0%Ti1.0～1.2%Al0.05～0.15%Si≤0.10%Mn≤0.10%S≤0.008%P≤0.008%RE0.005～0.015%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91104461A CN1056902A (en) | 1991-07-12 | 1991-07-12 | Maraging steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91104461A CN1056902A (en) | 1991-07-12 | 1991-07-12 | Maraging steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1056902A true CN1056902A (en) | 1991-12-11 |
Family
ID=4906641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91104461A Pending CN1056902A (en) | 1991-07-12 | 1991-07-12 | Maraging steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056902A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250704A (en) * | 2014-09-12 | 2014-12-31 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel ingot and preparation method thereof |
| CN104259240A (en) * | 2014-09-12 | 2015-01-07 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel bar and preparation method thereof |
| CN113549842A (en) * | 2021-06-21 | 2021-10-26 | 首钢集团有限公司 | High-strength bulletproof helmet shell and preparation method thereof |
| WO2022170789A1 (en) * | 2021-02-10 | 2022-08-18 | 华为技术有限公司 | Steel material, steel structural member and preparation method therefor, and terminal |
-
1991
- 1991-07-12 CN CN91104461A patent/CN1056902A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250704A (en) * | 2014-09-12 | 2014-12-31 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel ingot and preparation method thereof |
| CN104259240A (en) * | 2014-09-12 | 2015-01-07 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel bar and preparation method thereof |
| CN104259240B (en) * | 2014-09-12 | 2016-03-09 | 攀钢集团江油长城特殊钢有限公司 | A kind of 18Ni-200 rod iron and preparation method thereof |
| CN104250704B (en) * | 2014-09-12 | 2016-07-13 | 攀钢集团江油长城特殊钢有限公司 | A kind of 18Ni-200 steel ingot and preparation method thereof |
| WO2022170789A1 (en) * | 2021-02-10 | 2022-08-18 | 华为技术有限公司 | Steel material, steel structural member and preparation method therefor, and terminal |
| CN113549842A (en) * | 2021-06-21 | 2021-10-26 | 首钢集团有限公司 | High-strength bulletproof helmet shell and preparation method thereof |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |