CN106978565A - A kind of high intensity non-hardened and tempered steel - Google Patents
A kind of high intensity non-hardened and tempered steel Download PDFInfo
- Publication number
- CN106978565A CN106978565A CN201710216692.7A CN201710216692A CN106978565A CN 106978565 A CN106978565 A CN 106978565A CN 201710216692 A CN201710216692 A CN 201710216692A CN 106978565 A CN106978565 A CN 106978565A
- Authority
- CN
- China
- Prior art keywords
- steel
- hardened
- tempered steel
- tensile strength
- yield strength
- 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
Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Abstract
The present invention relates to a kind of non-hardened and tempered steel of high intensity, it is characterised in that its component is by weight percentage：C：0.34% 0.39%, Si：0.61% 0.75%, Mn：1.35 1.45%, S≤0.010%, P≤0.020%, Cr：0.10% 0.20%, Mo≤0.10%, Al：0.01 0.03%, V：0.16 0.25%, Ni≤0.10%, N：0.012 0.020%, O≤15 × 10‑6, remainder is Fe and inevitable impurity；A type impurity≤1.0 grade of obtained non-hardened and tempered steel.The present invention adds enough N by increasing substantially V content, it is ensured that V/N is 8 15, forms enough VN, V (CN)；Simultaneously by adding a small amount of Cr and carrying high Si content, the solution strengthening ability of steel is added, crystal grain thinning makes the tensile strength of steel reach more than 922Mpa, yield strength reaches more than 700Mpa；By the scope for controlling various composition, it is ensured that the Ceq in steel obtains unexpected extremely stable yield strength and tensile strength in the range of 0.67 0.74, and tensile strength reaches 922 1020MPa, and yield strength reaches 700 780MPa；Simultaneously by reducing the S contents in steel, sulphide grade is reduced, the service life of steel is improved.
Description
Technical field
The invention belongs to technical field of metallurgical manufacturing, be related to a kind of design production of non-hardened and tempered steel, specifically automobile,
A kind of design production of high intensity non-hardened and tempered steel of the parts such as the engine crankshafts such as truck, connecting rod.
Background technology
With the progress of automobile making, requirement of the part such as automobile crane, connecting rod to non-hardened and tempered steel material is also improved constantly,
It is required that material has good process industrial art performance, high-intensity high-tenacity etc..Non-hardened and tempered steel relies primarily on the micro member such as Nb, Ti, V
The addition of element combines the cold technique of follow-up forging control by the strength control of part in a suitable scope.
04 phase in 1994《Automobile Technology and Material》Entitled " 35MnVS easily cuts non-hardened and tempered steel " document, steel it is main
Composition Control is：0.33%~0.40%C, 0.30%~0.60%Si, 1.00%~1.40%Mn ,≤0.039%P, 0.035
~0.075%S, 0.06%~0.12%V.The actual control of yield strength is in 464-729.8MPa, and tensile strength is controlled in 732-
922MPa.It can be seen that, it is difficult to which stability contorting is in yield strength >=700MPa, tensile strength is in >=900MPa.
In the Micro Alloying engineering steel standards of GB/T 15712,38MnV main component control is：0.34%~0.41%
C ,≤0.60%Si, 1.20%~1.60%Mn ,≤0.035%P, 0.035~0.075%S ,≤0.30%Cr, 0.08%~
0.15%V.The product is also mainly Mn and micro V by adding certain content, takes the side such as solution strengthening, dispersion-strengtherning
Formula improves the intensity of steel.Yield strength requirement >=620MPa of the product, tensile strength >=800MPa.The tension of standard requirement is strong
Degree is relatively low.
In summary, using conventional composition design, the tensile strength of current non-hardened and tempered steel is difficult that stability contorting exists
More than 922MPa, and due to the addition of substantial amounts of element sulphur, the higher sulfide-based field trash of rank can be formed, although can be
Improve processing characteristics to a certain extent, but can also easily become formation of crack, reduce the service life of part.In present steel row
In the case that industry homogeneity competition is more serious, how more preferably to improve product quality and meet the requirement of client by significant increase enterprise
Competitiveness.
The content of the invention
The problem of to overcome above-mentioned, the present invention provides a kind of tensile strength more than 922Mpa and yield strength is more than 700
The manufacture method of MPa non-hardened and tempered steel, the characteristics of non-hardened and tempered steel is also equipped with good processing characteristics, long lifespan.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：A kind of tensile strength is more than 922Mpa and surrender
Intensity is more than 700 MPa non-hardened and tempered steel, and its component and its percentage by weight are：C：0.34%-0.39%, Si：0.61%-
0.75%, Mn：1.35-1.45%, S≤0.010%, P≤0.020%, Cr：0.10%-0.20%, Mo≤0.10%, Al：0.01-
0.03%, V：0.16-0.25%, Ni≤0.10%, N：0.012-0.020%； O≤15×10-6, remainder is for Fe and inevitably
Impurity.
In order to ensure the intensity of steel, the content of the V and N are met：8≤V/N≤15.
In order to ensure the strength stability of steel, the primary alloy constituent content and proportioning in steel are strictly controlled, so that it is guaranteed that
Carbon equivalent Ceq in steel（=C+Mn/6+Si/24+Cr/5+V/5）Control is in 0.67-0.74 scopes.
The present invention takes the composition design of the above, passes through converter smelting, LF refining, RH refinings and bloom continuous casting, heating
And continuous rolling is become a useful person, the Micro Alloying round steel intensity stabilization of sampling detection is controlled in a higher scope.
The beneficial effects of the invention are as follows：V content is increased substantially, and adds enough N, it is ensured that V/N：8-15, can be formed
Enough VN, V (CN)；A small amount of Cr is added simultaneously, the solution strengthening ability of steel is improved, and crystal grain thinning improves intensity；By improving
Si contents, more than conventional Si content ranges, strengthen solution strengthening, improve the yield strength of steel；By controlling various composition
Scope, it is ensured that the Ceq in steel is in the range of 0.67-0.74.By the combination of several enhancements, obtain it is unexpected extremely
Stable yield strength and tensile strength；Simultaneously by reducing the S contents in steel, sulphide grade is reduced, so as to improve steel
Service life.
Embodiment
With reference to embodiment, the present invention is further described.
A kind of novel high-strength non-hardened and tempered steel, its component and percentage by weight (Wt%) are：C：0.34%-0.39%, Si：
0.61%-0.75%, Mn：1.35-1.45%, S≤0.010%, P≤0.020%, Cr：0.10%-0.20%, Mo≤0.10%, Al：
0.01-0.03%, V：0.16-0.25%, Ni≤0.10%, N：0.012-0.020%；Residual elements O≤15 × 10-6, it is remaining to be
Fe and some other micro residue elements.Simultaneously in order to ensure strength stability, controlled by chemical composition arrowbandization, it is ensured that steel
In Ceq controls in 0.67-0.74, V/N is controlled in 8-15.
According to the composition design of scheme, converter smelting, LF refining and RH refinings and bloom continuous casting are taken, by the several of smelting
Stove steel billet is rolled into the round steel of 40mm, 50mm and 60mm specification after heating respectively, round steel, which is taken, to be rolled rear the natural type of cooling and be cooled to
Room temperature.Chemical composition, performance and the hoc scenario of sampling detection round steel, composition detection result are as shown in table 1, performance and tissue feelings
As shown in table 2, through hardening implementations are as shown in table 3 for condition.
The testing result of round steel prepared by 3 embodiments is respectively as shown in table 1-2.The change of comparative example 1,2 in Tables 1 and 2
Study point document " 35MnVS easily cuts non-hardened and tempered steel " corresponding with performance and " the standard 35MnV " of GB/T 15712 chemical composition and property
Can situation.
The Micro Alloying round steel finished product main chemical compositions of table 1 control situation（Wt, %）
The round steel tissue of table 2, behavior pattern
The chemical Composition Control of the Micro Alloying round steel of preparation is stable, and intensity is relatively high and stable, and Control of gas content is relatively low, A classes folder
Debris rank is low.
Claims (3)
1. a kind of non-hardened and tempered steel of high intensity, it is characterised in that its component is by weight percentage：
C：0.34%-0.39%, Si：0.61%-0.75%, Mn：1.35-1.45%, S≤0.010%, P≤0.020%, Cr：0.10%-
0.20%, Mo≤0.10%, Al：0.01-0.03%, V：0.16-0.25%, Ni≤0.10%, N：0.012-0.020%, O≤15×
10-6, remainder is Fe and inevitable impurity；A type impurity≤1.0 grade of wherein obtained non-hardened and tempered steel.
2. a kind of high intensity non-hardened and tempered steel as claimed in claim 1, it is characterised in that：8≤V/N≤15.
3. a kind of high intensity non-hardened and tempered steel as described in claim 1 or claim 2, it is characterised in that：0.67≤Ceq=C+
Mn/6+Si/24+ Cr/5+V/5≤0.74。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216692.7A CN106978565A (en) | 2017-04-05 | 2017-04-05 | A kind of high intensity non-hardened and tempered steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216692.7A CN106978565A (en) | 2017-04-05 | 2017-04-05 | A kind of high intensity non-hardened and tempered steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106978565A true CN106978565A (en) | 2017-07-25 |
Family
ID=59345440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710216692.7A Pending CN106978565A (en) | 2017-04-05 | 2017-04-05 | A kind of high intensity non-hardened and tempered steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106978565A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549287A (en) * | 2020-06-28 | 2020-08-18 | 宝钢特钢韶关有限公司 | Medium carbon steel and production process thereof |
| CN112143965A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Non-quenched and tempered oil casing pipe and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055715A (en) * | 2001-08-09 | 2003-02-26 | Kobe Steel Ltd | Method for producing hot forged non-heat treated connecting rod |
| CN102899575A (en) * | 2012-11-12 | 2013-01-30 | 莱芜钢铁集团有限公司 | Non-quenched and tempered steel used for welding and electroplating hydraulic rod and production method thereof |
| CN103695793A (en) * | 2013-12-17 | 2014-04-02 | 西宁特殊钢股份有限公司 | Large-sized non-quenched and tempered steel and smelting method thereof |
| CN103958714A (en) * | 2011-11-21 | 2014-07-30 | 新日铁住金株式会社 | Rolled steel bar for hot forging |
-
2017
- 2017-04-05 CN CN201710216692.7A patent/CN106978565A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055715A (en) * | 2001-08-09 | 2003-02-26 | Kobe Steel Ltd | Method for producing hot forged non-heat treated connecting rod |
| CN103958714A (en) * | 2011-11-21 | 2014-07-30 | 新日铁住金株式会社 | Rolled steel bar for hot forging |
| CN102899575A (en) * | 2012-11-12 | 2013-01-30 | 莱芜钢铁集团有限公司 | Non-quenched and tempered steel used for welding and electroplating hydraulic rod and production method thereof |
| CN103695793A (en) * | 2013-12-17 | 2014-04-02 | 西宁特殊钢股份有限公司 | Large-sized non-quenched and tempered steel and smelting method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 齐宝森等: "《新型材料及其应用》", 30 September 2007, 哈尔滨工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143965A (en) * | 2019-06-28 | 2020-12-29 | 宝山钢铁股份有限公司 | Non-quenched and tempered oil casing pipe and manufacturing method thereof |
| CN112143965B (en) * | 2019-06-28 | 2022-06-28 | 宝山钢铁股份有限公司 | Non-quenched and tempered oil casing pipe and manufacturing method thereof |
| CN111549287A (en) * | 2020-06-28 | 2020-08-18 | 宝钢特钢韶关有限公司 | Medium carbon steel and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101694875B1 (en) | QP High-Strength Hot Rolling QP Steel and Method of Manufacturing the Same | |
| WO2015197007A1 (en) | Carburized alloy steel, method for preparing same, and use thereof | |
| CN104120368B (en) | A kind of automobile frame high intensity austenitic stainless steel and its manufacturing method | |
| CN108220815B (en) | Hot work die steel with high heat resistance and high impact toughness for hot forging and preparation method thereof | |
| TW201839152A (en) | High-Mn steel and production method therefor | |
| CN110343954A (en) | A kind of connection rod of automobile engine steel and its manufacturing method | |
| CN111074148B (en) | 800 MPa-level hot stamping axle housing steel and manufacturing method thereof | |
| CN102071368A (en) | Medium carbon non-quenched and tempered steel used in low-cost forging | |
| CN109338228A (en) | A kind of high conductivity anode steel claw steel and preparation method thereof | |
| CN103882301B (en) | J55 level Low-cost electric welding resistance oil casing pipe steel and manufacture method thereof | |
| CN106978565A (en) | A kind of high intensity non-hardened and tempered steel | |
| WO2021057954A1 (en) | Steel for alloy structure and manufacturing method therefor | |
| CN114875302B (en) | Low-alloy steel and preparation method and application thereof | |
| CN112912530A (en) | Austenitic high-manganese steel material with excellent yield strength and preparation method thereof | |
| CN115446459A (en) | High-strength steel laser welding filler, joint and method | |
| KR20160014998A (en) | Steel sheet and method of manufacturing the same | |
| CN111270160B (en) | High-elongation hot-rolled tissue regulating steel with tensile strength of more than or equal to 1200MPa and production method thereof | |
| TWI727230B (en) | Cast iron structure and manufacturing method thereof | |
| KR20140056767A (en) | Axle beam and method of manufacturing the same | |
| CN112442629A (en) | Medium-carbon steel for mechanical structure and manufacturing method thereof | |
| CN115386791B (en) | Flat steel for micro-alloyed high-strength weldable composite stabilizer bar torsion spring and manufacturing method thereof | |
| JP7287448B1 (en) | Warm forged parts for carburizing and manufacturing method thereof | |
| CN113737081B (en) | Stainless steel smelting method, stainless steel modification method and stainless steel | |
| CN115679194B (en) | Plastic mold steel plate and manufacturing method thereof | |
| KR20130002188A (en) | Shape steel and method of manufacturing the shape steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170725 |
|
| RJ01 | Rejection of invention patent application after publication |