CN106906415A - It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature - Google Patents
It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature Download PDFInfo
- Publication number
- CN106906415A CN106906415A CN201510975503.5A CN201510975503A CN106906415A CN 106906415 A CN106906415 A CN 106906415A CN 201510975503 A CN201510975503 A CN 201510975503A CN 106906415 A CN106906415 A CN 106906415A
- Authority
- CN
- China
- Prior art keywords
- cold rolling
- strength steel
- transition temperature
- phosphorate
- 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.)
- 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
- C22C38/04—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
- C22C38/001—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
- C22C38/02—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
- C22C38/06—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Phosphorated high-strength steel field the present invention relates to cold rolling IF, it is specially a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature.Cold rolling IF phosphorate high-strength steel phosphorus content between 0.05wt%~0.09wt%, B content control between 0.0010wt%~0.0020wt%.Phosphorated the brittle transition temperature of high-strength steel to improve cold rolling IF, improve the secondary workability of steel, adapt to northern China winter automobile production and the requirement for using, ensure the safety in utilization of automobile, by being properly added B element, the phosphorate brittle transition temperatures of high-strength steel of cold rolling IF are made to be reduced to subzero less than 50 DEG C, it is to avoid brittle fracture occurs during secondary operation in the cold rolling IF high-strength steel that phosphorates.
Description
Technical field
Phosphorated high-strength steel field the present invention relates to cold rolling IF, it is specially a kind of to improve cold rolling IF and phosphorate high-strength steel brittleness
The method of transition temperature.
Background technology
IF steel, sometimes referred to as full name Interstitial-Free Steel, i.e. gapless atomic steel, ultra-low-carbon steel, has
Extremely excellent deep drawability, present elongation and r values are obtained up to 50% and more than 2.0 in auto industry
Extensive use.In IF steel, because C, N content are low, a certain amount of titanium (Ti), niobium (Nb) are added
Etc. strong carboritride formation element, the interstitial atoms such as the carbon in ultra-low-carbon steel, nitrogen are completely fixed for carbon nitridation
Compound, the clean ferritic steel of gap-free atom, as Ultra-low carbon gapless atomic steel obtained from
(Interstitial Free Steel)。
By weight percentage, the chemistry of IF steel turns into：C≤0.003；Si≤0.03；Mn 0.10~0.20；P≤
0.006；S≤0.007；Al 0.02~0.05；Ti 0.04~0.08；O≤0.003；N≤0.004；Nb 0.06~
0.25.IF steel mainly for the production of auto parts and components, north of China most area winter temperature zero
Lower 20 DEG C or so, and subzero 30 DEG C or so can be reached for more remote regional winter temperature, thus mean
IF steel in the winter time using or production auto parts and components there is secondary operation (such as：Car crass) when,
Easily there is brittle fracture in steel plate, badly influences the personal safety of autoist.
The content of the invention
A kind of method of the high-strength steel brittle transition temperature that phosphorated it is an object of the invention to provide cold rolling IF of improvement, solution
Certainly there is steel plate in the prior art and brittle fracture easily occur, badly influence personal safety of autoist etc.
Problem.
The technical scheme is that：
A kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature, the phosphorate phosphorus of high-strength steel of cold rolling IF contains
Between 0.05wt%~0.09wt%, B content is controlled between 0.0010wt%~0.0020wt% amount, Transition of Brittleness
Temperature reaches subzero less than 50 DEG C.
The described cold rolling IF of improvement phosphorates the method for high-strength steel brittle transition temperature, and cold rolling IF phosphorates the phosphorus of high-strength steel
Between 0.065wt%~0.085wt%, B content is controlled between 0.0012wt%~0.0018wt% content, fragility
Transition temperature reaches subzero less than 55 DEG C.
Advantages of the present invention and beneficial effect are：
1st, in order to reduce production cost, as cold rolling IF phosphorates the increase of high-strength hardness of steel, the addition of P content
Also can gradually increase, can so greatly improve the brittle transition temperature of steel, before without B element, cold rolling IF
Phosphorate high-strength steel brittle transition temperature it is minimum at subzero 25 DEG C or so, with P content in steel increase fragility turn
Temperature is being improved constantly.
2nd, brittle transition temperature refers to that when the temperature decreases, metal material turns to brittle state by ductile states change
Temperature province, also referred to as ductile-brittle transition temperature.More than brittle transition temperature region, metal material is in toughness
State, fracture mode is mainly ductile rupture；Below brittle transition temperature region, material is in fragility shape
State, fracture mode is mainly brittle fracture.Brittle transition temperature is lower, illustrates that the cold short performance of resistance of steel is got over
Height, i.e. suitability for secondary processing are better.Phosphorated the brittle transition temperature of high-strength steel to improve cold rolling IF, improve steel
Secondary workability, adapt to northern China winter automobile production and the requirement that uses, it is ensured that automobile uses peace
Quan Xing, by being properly added B element, makes the phosphorate brittle transition temperatures of high-strength steel of cold rolling IF be reduced to subzero 50
Below DEG C, it is to avoid brittle fracture occurs during secondary operation in the cold rolling IF high-strength steel that phosphorates.
Specific embodiment
In specific implementation process, cold rolling IF phosphorate high-strength steel be in ultra-low-carbon steel addition Nb, Ti element, make
C, N atom are fixed completely in steel and gap-free atom is present, then by adding the solution strengthening such as P, Mn, Si
The method of element reinforcing or refined crystalline strengthening improves the intensity of steel.Consider that cold rolling IF phosphorates the products characteristics of high-strength steel,
First it is the presence of gap-free atom, the crystal boundary of steel is very weak, in low temperature Pressing Deformation it sometimes appear that embrittlement
Trend, next to that adding P elements in IF steel, between 0.05%~0.09%, black brittleness problem is more for phosphorus content
Plus it is prominent, reason is that phosphorus easily makes embrittlement of grain boundaries in Grain Boundary Segregation, weakens the cohesive force of crystal boundary.Do not increasing additionally
On the basis of the production cost of additional element, in order to prevent the cyrystal boundary segregation of phosphorus, on the basis of original composition design
The upper appropriate B element of addition 0.0010%~0.0020% in steel, B element moves to crystal boundary, and reinforcing crystal boundary is simultaneously
The segregation of phosphorus is prevented, so as to reduce the brittle transition temperature of steel, makes brittle transition temperature from original subzero 25 DEG C
Subzero 50 DEG C are reduced to, use and secondary operation requirement of the auto parts and components in low temperature is met, it is to avoid occur crisp
Property cracking, influence autoist personal safety.Using the process route of conventional IF steel：Blast furnace → molten iron takes off
Sulphur → top and bottom combined blown converter → argon gas stirring → RH application of vacuum → continuous casting.
Below, by embodiment, the present invention is described in more detail.
Embodiment 1
In the present embodiment, by weight percentage, cold rolling IF phosphorate high-strength steel chemical composition it is as follows：Carbon
0.0020%, silicon 0.025%, manganese 0.10%, sulphur 0.0040%, aluminium 0.036%, titanium 0.061%, niobium 0.08%, phosphorus
0.080%, boron 0.0015%, oxygen 0.0025%, nitrogen 0.0035%, remaining is iron, and the brittle transition temperature of steel reaches
Subzero 55 DEG C.
Embodiment 2
In the present embodiment, by weight percentage, cold rolling IF phosphorate high-strength steel chemical composition it is as follows：Carbon
0.0015%, silicon 0.012%, manganese 0.15%, sulphur 0.0046%, aluminium 0.043%, titanium 0.045%, niobium 0.13%, phosphorus
0.052%, boron 0.0010%, oxygen 0.0020%, nitrogen 0.0030%, remaining is iron, and the brittle transition temperature of steel reaches
Subzero 50 DEG C.
Embodiment 3
In the present embodiment, by weight percentage, cold rolling IF phosphorate high-strength steel chemical composition it is as follows：Carbon
0.0025%, silicon 0.018%, manganese 0.20%, sulphur 0.0032%, aluminium 0.027%, titanium 0.067%, niobium 0.16%, phosphorus
0.085%, boron 0.0018%, oxygen 0.0015%, nitrogen 0.0020%, remaining is iron, and the brittle transition temperature of steel reaches
Subzero 60 DEG C.
Embodiment result shows, is phosphorated high-strength steel for cold rolling IF, and the present invention is appropriate by addition in smelting procedure
B element, improve steel brittle transition temperature, improve steel secondary workability, it is to avoid steel is used in low temperature
With occur brittle cracking problem in secondary processing process, improve the security of materials'use.
Claims (2)
1. it is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature, it is characterised in that cold rolling IF
Phosphorate high-strength steel phosphorus content between 0.05wt%~0.09wt%, B content control 0.0010wt%~
Between 0.0020wt%, brittle transition temperature reaches subzero less than 50 DEG C.
2. the method for the high-strength steel brittle transition temperature that phosphorated according to the cold rolling IF of improvement described in claim 1, it is special
Levy and be, cold rolling IF phosphorate high-strength steel phosphorus content between 0.065wt%~0.085wt%, B content control exist
Between 0.0012wt%~0.0018wt%, brittle transition temperature reaches subzero less than 55 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975503.5A CN106906415A (en) | 2015-12-23 | 2015-12-23 | It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975503.5A CN106906415A (en) | 2015-12-23 | 2015-12-23 | It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106906415A true CN106906415A (en) | 2017-06-30 |
Family
ID=59199347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510975503.5A Pending CN106906415A (en) | 2015-12-23 | 2015-12-23 | It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106906415A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023050A (en) * | 2018-08-10 | 2018-12-18 | 湖南华菱涟钢薄板有限公司 | 390 MPa-grade high-strength IF steel and production method thereof |
| CN114000060A (en) * | 2021-11-10 | 2022-02-01 | 山东钢铁集团日照有限公司 | Production method of high-strength low-temperature-impact-resistant phosphorus-containing high-strength steel strip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011243A (en) * | 2011-12-27 | 2014-08-27 | 新日铁住金株式会社 | Hot-dip plated high-strength steel sheet for press working with excellent low-temperature toughness and corrosion resistance, and process for producing same |
| CN104630622A (en) * | 2015-01-20 | 2015-05-20 | 内蒙古科技大学 | High-strength IF steel containing rare earth and preparation method of high-strength IF steel |
-
2015
- 2015-12-23 CN CN201510975503.5A patent/CN106906415A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011243A (en) * | 2011-12-27 | 2014-08-27 | 新日铁住金株式会社 | Hot-dip plated high-strength steel sheet for press working with excellent low-temperature toughness and corrosion resistance, and process for producing same |
| CN104630622A (en) * | 2015-01-20 | 2015-05-20 | 内蒙古科技大学 | High-strength IF steel containing rare earth and preparation method of high-strength IF steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023050A (en) * | 2018-08-10 | 2018-12-18 | 湖南华菱涟钢薄板有限公司 | 390 MPa-grade high-strength IF steel and production method thereof |
| CN114000060A (en) * | 2021-11-10 | 2022-02-01 | 山东钢铁集团日照有限公司 | Production method of high-strength low-temperature-impact-resistant phosphorus-containing high-strength steel strip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106661705B (en) | carburized alloy steel and preparation method and application thereof | |
| CN111074140B (en) | Method for manufacturing cold-rolled low-carbon enamel steel for household appliances | |
| CN102796967B (en) | 800 MPa economic corrosion-resistance and high-strength steel plate | |
| CN104451385B (en) | A kind of low-carbon (LC), low nitrogen, hyperoxia ingot iron and its production method | |
| CN108866444B (en) | Corrosion-resistant mirror surface die steel and preparation method thereof | |
| WO2014015822A1 (en) | Glass-enameling high-strength steel plate and manufacturing method therefor | |
| CN101319294A (en) | Steel for fine grain carburizing gear and method of manufacturing the same | |
| CN102653843A (en) | Carburizing bearing steel | |
| CN105543703A (en) | Multi-microalloyed antifatigue carburized gear steel and manufacturing method thereof | |
| CN108315656A (en) | A kind of 8.8 grades of fastener cold-forging steels and its manufacturing method for exempting from heat treatment | |
| CN102409233A (en) | Low-temperature steel for engineering machinery and production method thereof | |
| CN102199727A (en) | 400MPa high-strength and high-forming-performance cold rolled steel plate and production method thereof | |
| CN102912227A (en) | Soft tinning raw steel plate and manufacturing method thereof | |
| CN110343971B (en) | Ultrahigh-strength hot-galvanized complex-phase steel and production method thereof | |
| CN103882322B (en) | 590 Mpa-grade high-strength structural steel plate and manufacturing method thereof | |
| CN104213022A (en) | Agitation tank steel with tensile strength of 650 MPa grade and production method thereof | |
| WO2019029533A1 (en) | Cast steel, preparation method for cast steel and use of cast steel | |
| CN106906415A (en) | It is a kind of to improve cold rolling IF and phosphorate the method for high-strength steel brittle transition temperature | |
| CN103725974A (en) | Novel low-cost wear-resistant pipe steel X65 steel plate and production method thereof | |
| CN110106432A (en) | A kind of preparation method of high nitrogen steel | |
| CN104046923B (en) | The X80 pipe line steel smelted under half steel condition and production technique thereof | |
| CN111424215B (en) | Cold-rolled low-carbon enamel steel for household appliances | |
| CN102732802B (en) | Boiler-steam-drum-use steel with thickness no lower than 80mm, and production method thereof | |
| CN111979478B (en) | Thin SAPH440 strip steel and production method thereof | |
| CN111254247B (en) | Method for controlling titanium-containing IF steel continuous casting nozzle nodulation |
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: 20170630 |
|
| RJ01 | Rejection of invention patent application after publication |