CN107151764A - A kind of heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal annealing method - Google Patents
A kind of heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal annealing method Download PDFInfo
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- CN107151764A CN107151764A CN201710378673.4A CN201710378673A CN107151764A CN 107151764 A CN107151764 A CN 107151764A CN 201710378673 A CN201710378673 A CN 201710378673A CN 107151764 A CN107151764 A CN 107151764A
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- wire rod
- stainless steel
- heat
- slow cooling
- containing molybdenum
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The invention discloses a kind of heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal annealing method, the stainless steel wire rod chemical composition composition and weight/mass percentage composition are：C：0.35 0.45%, Si：1.90 2.60%, Mn≤0.70%, P≤0.035%, S≤0.030%, Cr：9.00 10.50%, Mo：0.70 0.90%, surplus is Fe and inevitable impurity；The isothermal annealing method includes wire rod heating, insulation process, wire rod slow cooling, insulation process, wire rod slow cooling, quick refrigerating work procedure.The present invention is designed by rational annealing process, both ensure that annealing wire rod has compared with soft, in turn ensure that the grain size of material；The performance indications of annealing wire rod：Hardness HB≤269；Grain size >=8 grade.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of the heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal are moved back
Ignition method.
Background technology
Heat-resistance stainless steel is a kind of use in high temperature, the material of high corrosion environment.Because of the particularity of use environment, to material
Existing resistant to elevated temperatures requirement, also has corrosion resistant requirement, while also being had higher requirements to intensity.
The heat-resistance stainless steel of martensite containing molybdenum 40Cr10Si2Mo of the present invention is used for production automotive engine valves, row
In tracheae high temperature section connecting bolt and other hot environments, environment temperature is at 400 DEG C -1000 DEG C or so.In use
The problems such as part can not occur bending, be broken.This just proposes requirement to the processing characteristics of material.National standard《Internal combustion engine, which is inspired, to be used
Steel and alloy steel rod》（GB/T12773）In define annealing wire rod performance indications：Hardness HB≤269；Grain size：8 grades or more
Carefully.
Material is in annealing process, and the reduction by one of hardness is to rely on structural transformation, and two are grown up by crystal grain.And the material
The difficult point of annealing is both to require that relatively low hardness is easy to processing, requires that crystal grain can not be roughened again, this is just carried to annealing process
Requirement is gone out.
The present invention starts with from annealing process, by rationally designing annealing process, it is ensured that annealing wire rod has compared with soft,
It in turn ensure that the grain size of material.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of heat-resistance stainless steel wire rod of martensite containing molybdenum；The present invention is also carried
For a kind of isothermal annealing method of the heat-resistance stainless steel of martensite containing molybdenum wire rod.By annealing process control, hardness reduction is realized, together
When ensure crystal grain be not roughened.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of heat-resistance stainless steel of martensite containing molybdenum
Wire rod, chemical composition composition and weight/mass percentage composition are：C：0.35-0.45%, Si：1.90-2.60%, Mn≤0.70%, P≤
0.035%, S≤0.030%, Cr：9.00-10.50%, Mo：0.70-0.90%, surplus is Fe and inevitable impurity.
Stainless steel wire rod hardness HB≤269 of the present invention；Grain size >=8 grade.
Stainless steel wire rod specification of the present invention is φ 6.5-12.0mm.
Isothermal annealing method of the present invention includes wire rod heating, insulation process, and wire rod slow cooling, insulation process, wire rod delay
Cold, quick refrigerating work procedure.
Wire rod heating of the present invention, insulation process, wire rod are warming up to 855-865 DEG C, are incubated 350-370min.
Wire rod slow cooling of the present invention, insulation process, 15-25 DEG C of slow cooling cooling velocity/h, slow cooling are protected to 795-805 DEG C
Warm 110-130min.
Wire rod slow cooling of the present invention, quick refrigerating work procedure, slow cooling cooling velocity are 15-25 DEG C/h, slow cooling to≤650
℃。
Wire rod slow cooling of the present invention, quick refrigerating work procedure, quick cooling velocity are 50-60 DEG C/h, and≤600 are cooled to soon
DEG C, wire rod is come out of the stove.
The heat-resisting rod irons of product martensite containing molybdenum heat-resistance stainless steel wire rod canonical reference GB/T1221 of the present invention, GB/T231.1
Jin Shubushi hardness detection methods.
Design principle of the present invention is：
Can occur martensitic phase in the cooling procedure of the heat-resistance stainless steel 40Cr10Si2Mo of martensite containing molybdenum gren rods after hot rolling
Become, hardness is high, it is impossible to process.Being beneficial to processing for reduction hardness needs to be annealed, and annealing hardness HB wants≤269, and anneals
Crystal grain can not be caused to grow up, it is necessary to ensure at 8 grades or higher.With reference to 40Cr10Si2Mo structural transformation critical-temperature Ac1：900
℃；Ar1：810℃.
The factor for causing crystal grain to be grown up in annealing process has two, and one is that temperature is high, and two be that the time is long.To ensure crystal grain not
Grow up, austenite transformation does not occur preferably for annealing process, i.e., highest holding temperature is not above 900 DEG C.Therefore, highest insulation temperature
Degree is designed as 865 DEG C, 6h ± 10min is incubated, to ensure that tissue fully changes.To avoid the soaking time mistake under 865 DEG C of high temperature
It is long to produce abnormal structure, using the techniques for being cooled to 800 ± 5 DEG C of continuation insulation 2h ± 10min, it is to avoid while grain coarsening again
Hardness is set further to reduce.Slow cooling is to 650 DEG C after insulation terminates, to ensure that structural transformation is more thorough；Structural transformation afterwards
It has been be basically completed that, therefore be quickly cooled to 600 DEG C and come out of the stove.
The heat-resistance stainless steel 40Cr10Si2Mo wire rod detection methods of the inventive method production refer to GB/T12773.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the present invention is designed by rational annealing process,
Both it ensure that annealing wire rod has compared with soft, in turn ensure that the grain size of material.2nd, the property of annealing wire rod produced by the invention
Can index：Hardness HB≤269；Grain size >=8 grade.
Brief description of the drawings
Fig. 1 is annealing process curve figure of the present invention.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
The present embodiment heat-resistance stainless steel wire rod 40Cr10Si2Mo φ 6.5mm, its chemical composition composition and weight/mass percentage composition are：
C：0.38%, Si：2.06%, Mn：0.32%, P：0.022%, S：0.003%, Cr：9.61%, Mo：0.80%, surplus is Fe and can not
The impurity avoided.
Isothermal annealing method includes wire rod heating, insulation, wire rod slow cooling, insulation, wire rod slow cooling, quick refrigerating work procedure, tool
Body technology step is as follows：862 DEG C are warming up to, 350min, Slow cooling is incubated（23 DEG C/h of cooling velocity）To 803 DEG C, insulation
110min, slow cooling（20 DEG C/h of cooling velocity）To 650 DEG C, quick cooling（50 DEG C/h of cooling velocity）To 600 DEG C, wire rod is come out of the stove.
Annealing wire rod performance detection index is shown in Table 1：
Table 1
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 235 | 231 | 240 | 230 |
| Grain size | 10 | 10 | 10 | 10 |
Embodiment 2
The present embodiment heat-resistance stainless steel wire rod 40Cr10Si2Mo φ 9.0mm, its chemical composition composition and weight/mass percentage composition are：
C：0.40%, Si：1.95%, Mn：0.50%, P：0.030%, S：0.020%, Cr：9.80%, Mo：0.70%, surplus is Fe and can not
The impurity avoided.
Isothermal annealing method includes wire rod heating, insulation, wire rod slow cooling, insulation, wire rod slow cooling, quick refrigerating work procedure, tool
Body technology step is as follows：865 DEG C are warming up to, 355min, Slow cooling is incubated（20 DEG C/h of cooling velocity）To 801 DEG C, insulation
115min, slow cooling（18 DEG C/h of cooling velocity）To 650 DEG C, quick cooling（60 DEG C/h of cooling velocity）To 605 DEG C, wire rod is come out of the stove.
Annealing wire rod performance detection index is shown in Table 2：
Table 2
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 265 | 259 | 258 | 260 |
| Grain size | 9 | 9 | 9 | 9 |
Embodiment 3
The present embodiment heat-resistance stainless steel wire rod 40Cr10Si2Mo φ 10.0mm, its chemical composition composition and weight/mass percentage composition are：
C：0.42%, Si：2.1%, Mn：0.40%, P：0.015%, S：0.015%, Cr：9.50%, Mo：0.90%, surplus is Fe and can not kept away
The impurity exempted from.
Isothermal annealing method includes wire rod heating, insulation, wire rod slow cooling, insulation, wire rod slow cooling, quick refrigerating work procedure, tool
Body technology step is as follows：858 DEG C are warming up to, 360min, Slow cooling is incubated（20 DEG C/h of cooling velocity）To 800 DEG C, insulation
120min, slow cooling（25 DEG C/h of cooling velocity）To 650 DEG C, quick cooling（50 DEG C/h of cooling velocity）To 600 DEG C, wire rod is come out of the stove.
Annealing wire rod performance detection index is shown in Table 3：
Table 3
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 245 | 253 | 250 | 248 |
| Grain size | 9 | 9 | 9 | 9 |
Embodiment 4
The present embodiment heat-resistance stainless steel wire rod 40Cr10Si2Mo φ 10.0mm, its chemical composition composition and weight/mass percentage composition are：
C：0.39%, Si：2.4%, Mn：0.30%, P：0.025%, S：0.010%, Cr：10.15%, Mo：0.75%, surplus is Fe and can not
The impurity avoided.
Isothermal annealing method includes wire rod heating, insulation, wire rod slow cooling, insulation, wire rod slow cooling, quick refrigerating work procedure, tool
Body technology step is as follows：860 DEG C are warming up to, 365min, Slow cooling is incubated（20 DEG C/h of cooling velocity）To 800 DEG C, insulation
125min, slow cooling（20 DEG C/h of cooling velocity）To 645 DEG C, quick cooling（58 DEG C/h of cooling velocity）To 585 DEG C, wire rod is come out of the stove.
Annealing wire rod performance detection index is shown in Table 4：
Table 4
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 242 | 246 | 242 | 245 |
| Grain size | 10 | 10 | 10 | 10 |
Embodiment 5
The present embodiment heat-resistance stainless steel wire rod 40Cr10Si2Mo φ 12.0mm, its chemical composition composition and weight/mass percentage composition are：
C：0.35%, Si：1.90%, Mn：0.20%, P：0.035%, S：0.030%, Cr：9.00%, Mo：0.85%, surplus is Fe and can not
The impurity avoided.
Isothermal annealing method includes wire rod heating, insulation, wire rod slow cooling, insulation, wire rod slow cooling, quick refrigerating work procedure, tool
Body technology step is as follows：855 DEG C are warming up to, 370min, Slow cooling is incubated（15 DEG C/h of cooling velocity）To 795 DEG C, insulation
130min, slow cooling（15 DEG C/h of cooling velocity）To 640 DEG C, quick cooling（52 DEG C/h of cooling velocity）To 590 DEG C, wire rod is come out of the stove.
Annealing wire rod performance detection index is shown in Table 5：
Table 5
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 239 | 241 | 247 | 249 |
| Grain size | 9 | 9 | 9 | 9 |
Embodiment 6
The present embodiment heat-resistance stainless steel 40Cr10Si2Mo wire rod φ 8.0mm, its chemical composition composition and weight/mass percentage composition are：
C：0.45%, Si：2.60%, Mn：0.25%, P：0.031%, S：0.025%, Cr：10.50%, Mo：0.78%, surplus is Fe and can not
The impurity avoided.
Technology for Heating Processing is：859 DEG C are warming up to, 360min, Slow cooling is incubated（25 DEG C/h of cooling velocity）To 805 DEG C,
It is incubated 120min, slow cooling（25 DEG C/h of cooling velocity）To 630 DEG C, quick cooling（57 DEG C/h of cooling velocity）To 595 DEG C, wire rod goes out
Stove.
Annealing wire rod performance detection index is shown in Table 6：
Table 6
| Sample | 1# | 2# | 3# | 4# |
| Hardness | 245 | 241 | 246 | 251 |
| Grain size | 9 | 9 | 9 | 9 |
Above example is only used to illustrative and not limiting technical scheme, although entering with reference to above-described embodiment to the present invention
Go detailed description, it will be understood by those within the art that：Still the present invention can be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask among scope.
Claims (8)
1. a kind of heat-resistance stainless steel wire rod of martensite containing molybdenum, it is characterised in that the stainless steel wire rod chemical composition composition and matter
Measuring percentage composition is：C：0.35-0.45%, Si：1.90-2.60%, Mn≤0.70%, P≤0.035%, S≤0.030%, Cr：
9.00-10.50%, Mo：0.70-0.90%, surplus is Fe and inevitable impurity.
2. one kind heat-resistance stainless steel wire rod of martensite containing molybdenum according to claim 1, it is characterised in that the stainless steel disc
Bar hardness HB≤269；Grain size >=8 grade.
3. one kind heat-resistance stainless steel wire rod of martensite containing molybdenum according to claim 1, it is characterised in that the stainless steel disc
Bar specification is φ 6.5-12.0mm.
4. the isothermal annealing side based on a kind of heat-resistance stainless steel of martensite containing molybdenum wire rod described in claim 1-3 any one
Method, it is characterised in that the isothermal annealing method includes wire rod heating, insulation process, wire rod slow cooling, insulation process, wire rod delay
Cold, quick refrigerating work procedure.
5. a kind of isothermal annealing method of the heat-resistance stainless steel of martensite containing molybdenum wire rod according to claim 4, its feature exists
In the wire rod heating, insulation process, wire rod are warming up to 855-865 DEG C, are incubated 350-370min.
6. a kind of isothermal annealing method of the heat-resistance stainless steel of martensite containing molybdenum wire rod according to claim 4, its feature exists
In the wire rod slow cooling, insulation process, 15-25 DEG C of slow cooling cooling velocity/h, slow cooling are incubated 110- to 795-805 DEG C
130min。
7. a kind of isothermal annealing side of the heat-resistance stainless steel of martensite containing molybdenum wire rod according to claim 4-6 any one
Method, it is characterised in that the wire rod slow cooling, quick refrigerating work procedure, slow cooling cooling velocity is 15-25 DEG C/h, slow cooling to≤650
℃。
8. a kind of isothermal annealing side of the heat-resistance stainless steel of martensite containing molybdenum wire rod according to claim 4-6 any one
Method, it is characterised in that the wire rod slow cooling, quick refrigerating work procedure, quick cooling velocity is 50-60 DEG C/h, and≤600 are cooled to soon
DEG C, wire rod is come out of the stove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378673.4A CN107151764A (en) | 2017-05-25 | 2017-05-25 | A kind of heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal annealing method |
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|---|---|---|---|
| CN201710378673.4A CN107151764A (en) | 2017-05-25 | 2017-05-25 | A kind of heat-resistance stainless steel wire rod of martensite containing molybdenum and its isothermal annealing method |
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Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983003A (en) * | 2019-10-28 | 2020-04-10 | 邢台钢铁有限责任公司 | Production method of martensite air valve steel 45Cr9Si3 wire rod |
| CN113166899A (en) * | 2018-09-28 | 2021-07-23 | 康宁股份有限公司 | Alloy metals having increased austenite transformation temperatures and articles comprising the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274632A (en) * | 1999-05-20 | 2000-11-29 | 重庆钢铁(集团)有限责任公司 | Production process of small steel shape for gas valve |
| CN101233254A (en) * | 2005-07-29 | 2008-07-30 | Crs控股公司 | Corrosion-resistant, cold-formable, machinable, high strength, martensitic stainless steel |
| CN101967610A (en) * | 2009-07-28 | 2011-02-09 | 宝山钢铁股份有限公司 | High carbon high silicon martensite stainless steel billet and preparation method thereof |
| CN104975231A (en) * | 2015-06-30 | 2015-10-14 | 柳州金特新型耐磨材料股份有限公司 | Lost foam 4Cr9Si2 material |
-
2017
- 2017-05-25 CN CN201710378673.4A patent/CN107151764A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274632A (en) * | 1999-05-20 | 2000-11-29 | 重庆钢铁(集团)有限责任公司 | Production process of small steel shape for gas valve |
| CN101233254A (en) * | 2005-07-29 | 2008-07-30 | Crs控股公司 | Corrosion-resistant, cold-formable, machinable, high strength, martensitic stainless steel |
| CN101967610A (en) * | 2009-07-28 | 2011-02-09 | 宝山钢铁股份有限公司 | High carbon high silicon martensite stainless steel billet and preparation method thereof |
| CN104975231A (en) * | 2015-06-30 | 2015-10-14 | 柳州金特新型耐磨材料股份有限公司 | Lost foam 4Cr9Si2 material |
Non-Patent Citations (4)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局，中国国家标准化管理委员会: "《中华人民共和国国家标准 GB/T 1221-2007》", 1 December 2007 * |
| 吴武楠: "4Cr10Si2Mo钢丝球化工艺研究", 《特殊钢》 * |
| 林肇杰，等: "国产4Cr9Si2、4Cr10Si2Mo气阀钢的性能及状况", 《内燃机配件》 * |
| 齐小卫，等: "马氏体型耐热钢螺栓的热处理", 《摩托车技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113166899A (en) * | 2018-09-28 | 2021-07-23 | 康宁股份有限公司 | Alloy metals having increased austenite transformation temperatures and articles comprising the same |
| JP2022501515A (en) * | 2018-09-28 | 2022-01-06 | コーニング インコーポレイテッド | Alloy metals with increased austenite transformation temperature and articles containing them |
| CN110983003A (en) * | 2019-10-28 | 2020-04-10 | 邢台钢铁有限责任公司 | Production method of martensite air valve steel 45Cr9Si3 wire rod |
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Application publication date: 20170912 |