CN104032225A - High-strength high-toughness stainless steel screw material - Google Patents
High-strength high-toughness stainless steel screw material Download PDFInfo
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- CN104032225A CN104032225A CN201410281823.6A CN201410281823A CN104032225A CN 104032225 A CN104032225 A CN 104032225A CN 201410281823 A CN201410281823 A CN 201410281823A CN 104032225 A CN104032225 A CN 104032225A
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Abstract
The invention relates to a high-strength high-toughness stainless steel screw material and belongs to the technical field of stainless steel. The material comprises the following chemical components in percentage by weight: 0.13-0.19% of C, less than or equal to 0.6% of Si, 0.6-1.0% of Mn, less than or equal to 0.01% of P, less than or equal to 0.01% of S, 3.0-4.0% of Ni, 15.0-16.0% of Cr, 1.4-1.9% of Mo, 1.0-2.0% of Cu, 0.05-0.12% of N, and the balance of Fe and inevitable impurities. The material disclosed by the invention has the advantage of good match between strength and toughness, especially the match between hardness and toughness and is applicable in manufacturing a screw material for a nuclear reactor drive mechanism.
Description
Technical field
The invention belongs to stainless steel technical field, a kind of high-strength, high-toughness stainless steel leading screw material is particularly provided, be applicable to manufacture nuclear reactor driving mechanism leading screw.
Background technology
Nuclear reactor driving mechanism has good corrosion resisting property, shock resistance and wear resisting property with leading screw material requirements, conventionally adopts high strength stainless steel manufacture.In prior art, adopt 0Cr17Ni4Cu4Nb PH Stainless Steel as leading screw material.0Cr17Ni4Cu4Nb PH Stainless Steel mainly relies on the strengthening of copper-rich phase, and maximum hardness can reach HRC=45, but corresponding impact value A now
kU2≤ 12J, although can adjust the relation between intensity, toughness by thermal treatment, intensity corresponding when toughness is high is lower, wear resistance is poor, cannot obtain all high matching relationships of obdurability, 0Cr17Ni4Cu4Nb leading screw serious wear in actual moving process.
The obdurability of prior art steel grade mates the requirement that especially coupling of Hardness and toughness can not touch the mark, and therefore needs to design a kind of novel material.
Summary of the invention
The object of the present invention is to provide a kind of high-strength, high-toughness stainless steel leading screw material, by 0Cr17Ni4Cu4Nb PH Stainless Steel Material Addition and minimizing alloying element are obtained to a kind of high-strength and high ductility Martensite Stainless Steel, and realize by controlling thermal treatment process the method that improves intensity and toughness.
The chemical composition of high-strength, high-toughness stainless steel leading screw material of the present invention is by weight percentage: C:0.13～0.19%, Si≤0.6%, Mn:0.6～1.0%, P≤0.01%, S≤0.01%, Ni:3.0～4.0%, Cr:15.0～16.0%, Mo:1.4～1.9%, Cu:1.0～2.0%, N:0.05～0.12%, surplus is Fe and inevitable impurity
According to above-mentioned purpose, the present invention adopts on the basis of 0Cr17Ni4Cu4Nb PH Stainless Steel, improve the content of C, adjust Cu, the content of Ni, and add Mo, N alloying element, remove Nb element, realized by 1050 DEG C～1090 DEG C insulation 0.5～2h, the heat treating regime of oil cooling+(192) DEG C deepfreeze+400 DEG C～600 DEG C of timeliness, significantly improves the object of intensity and toughness.
The technology of the present invention principle is as follows:
The interpolation of the raising of C content and N element can improve the intensity of steel, expands austenite stable region, reduces delta ferrite level, and therefore C content is controlled at 0.13～0.19%.
Ni is austenite phase forming element, expands austenite stable region, thereby can improve the toughness of material.But Ni content is too much, M
spoint reduce, when cooling, can cause too much residual austenite, make the strength of materials reduce, therefore in martensite aged stainless steel the content general control of Ni 3～10%.
The raising of Cu content can increase the content of copper-rich phase, thereby improves the intensity of material, but copper too high levels, toughness has obvious decline.Balance is considered the strengthening effect of Cu and the impact on hot workability and toughness, and the content of control Cu of the present invention is between 1.0～2.0.
Mo plays solution strengthening effect, promotes in addition the effect that MX type carbonitride is separated out with nano-form simultaneously, thereby improves the intensity of steel; But Mo content too much can cause δ iron element to be stopped to be formed, and reduces intensity and toughness, and therefore the content of Mo is controlled at 1.4～1.9%.
Nb is carbide, but easy segregation forms primary carbide while smelting, reduces toughness, does not therefore add Nb element.
According to above-mentioned purpose and technological principle technical scheme of the present invention be: on 0Cr17Ni4Cu4Nb basis, add and increase C content to 0.13～0.19%, add 0.05～0.12%N and 1.4～1.9%Mo, remove Nb element, control Cu content 1.0～3.0%, Ni content is 3.0～4.0%.
Beneficial effect of the present invention: compared with prior art, only add the content of a small amount of Alloy Elements Mo, N and adjustment alloying element C, Cu, Ni, remove Nb element, cost is more or less the same, coordinate rational thermal treatment process, intensity, the toughness of alloy after overaging all can significantly improve, can process there is high strength, the leading screw material bar of high rigidity, good impelling strength and good corrosion.
Embodiment
High-strength and high ductility leading screw material of the present invention will be described in more detail by an embodiment.The present embodiment is the description to best mode for carrying out the invention, scope of the present invention is not had to any restriction.
Embodiment:
Testing material, on 0Cr17Ni4Cu4Nb sedimentation type stainless steel base, increases C content to 0.13～0.19%, adds 0.05～0.12%N, 1.4～1.9%Mo, removes Nb element, adjusts the content of alloying element cu, Ni, adopts chemical composition in table 1.Under 1070 DEG C of solid solution+(192 DEG C) deepfreeze+400 DEG C～500 DEG C of timeliness heat treating regimes, the hardness of embodiment and ballistic work, with and with the contrast of prior art steel grade, in table 2.Prior art steel grade cannot be realized mating of high rigidity and high tenacity, embodiment still can keep very high impelling strength in more than hardness value is up to 46HRC, there is better obdurability coupling, can meet the application requiring of nuclear reactor driving mechanism leading screw material shock resistance and wear resisting property.
Table 1 embodiment of the present invention chemical composition (Wt.%)
| Embodiment | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N |
| 1# | 0.17 | 0.33 | 0.88 | 0.01 | 0.009 | 15.59 | 1.43 | 3.30 | 1.00 | 0.079 |
| 2# | 0.19 | 0.58 | 0.89 | 0.007 | 0.007 | 15.72 | 1.54 | 3.00 | 1.08 | 0.054 |
| 3# | 0.15 | 0.31 | 0.84 | 0.008 | 0.007 | 16.00 | 1.66 | 3.00 | 1.36 | 0.090 |
The hardness of table 2 prior art steel grade and embodiment and impact value
Claims (1)
1. a high-strength, high-toughness stainless steel leading screw material, it is characterized in that, chemical composition is by weight percentage:: C:0.13～0.19%, Si≤0.6%, Mn:0.6～1.0%, P≤0.01% ,≤0.01%, Ni:3.0～4.0%, Cr:15.0～16.0%, Mo:1.4～1.9%, Cu:.0～2.0%, N:0.05～0.12, surplus is Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281823.6A CN104032225A (en) | 2014-06-21 | 2014-06-21 | High-strength high-toughness stainless steel screw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281823.6A CN104032225A (en) | 2014-06-21 | 2014-06-21 | High-strength high-toughness stainless steel screw material |
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| CN104032225A true CN104032225A (en) | 2014-09-10 |
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| CN201410281823.6A Pending CN104032225A (en) | 2014-06-21 | 2014-06-21 | High-strength high-toughness stainless steel screw material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518086A (en) * | 2018-12-12 | 2019-03-26 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon strong cooling machine plough share shovel for aluminum |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436441A (en) * | 1990-05-31 | 1992-02-06 | Nkk Corp | High strength and high toughness stainless steel and its manufacture |
| CN1352319A (en) * | 2000-11-15 | 2002-06-05 | 浦项产业科学研究院 | Martensitic stainless steel with high mechanical strength and anti-corrosion |
| CN103695796A (en) * | 2013-12-12 | 2014-04-02 | 钢铁研究总院 | High-strength and high-toughness stainless steel and preparation method thereof |
-
2014
- 2014-06-21 CN CN201410281823.6A patent/CN104032225A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0436441A (en) * | 1990-05-31 | 1992-02-06 | Nkk Corp | High strength and high toughness stainless steel and its manufacture |
| CN1352319A (en) * | 2000-11-15 | 2002-06-05 | 浦项产业科学研究院 | Martensitic stainless steel with high mechanical strength and anti-corrosion |
| CN103695796A (en) * | 2013-12-12 | 2014-04-02 | 钢铁研究总院 | High-strength and high-toughness stainless steel and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518086A (en) * | 2018-12-12 | 2019-03-26 | 国家电投集团黄河上游水电开发有限责任公司 | Alloy material for carbon strong cooling machine plough share shovel for aluminum |
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Application publication date: 20140910 |