CN102912217A - Method for preventing copper-containing steel from cracking - Google Patents
Method for preventing copper-containing steel from cracking Download PDFInfo
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- CN102912217A CN102912217A CN2012104639814A CN201210463981A CN102912217A CN 102912217 A CN102912217 A CN 102912217A CN 2012104639814 A CN2012104639814 A CN 2012104639814A CN 201210463981 A CN201210463981 A CN 201210463981A CN 102912217 A CN102912217 A CN 102912217A
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Abstract
The invention relates to a method for preventing copper-containing steel from cracking. The method provided by the invention is characterized in that metal nickel is added in a copper-containing steel smelting process, and the mol ratio of nickel to copper is more than or equal to 1. The method provided by the invention has the advantages that only one metal nickel is added in the smelting process, so that less alloys are added; the nickel is added with copper and other alloys, so that an addition method is simple, and the process cost is not increased; the effect for eliminating a crack is obvious and effective; and the corrosion resistance of copper element is still active, and the integrated performances of steel (such as strength and low temperature impact toughness) are improved, so that the two aims are achieved at the same time.
Description
Technical field
The present invention relates to a kind of method that prevents that Copper Bearing Steel from cracking, belong to the metal material field in the metallurgical industry production.
Background technology
310 Yi shape steels are special-purpose special sections of making the railway carriage central sill, and working conditions and environment are abominable, require to have atmospheric corrosion resistance.The steel grade that 310 Yi shape steels with atmospheric corrosion resistance that Baogang produces as far back as the eighties of last century the nineties adopt is 09CuPTiRE, produced by ingot blank material system, because steel billet and Yi shape steel surface crack, rolling also difficulty, the removing surface workload is larger, and lumber recovery is less than 50%, and efficient is low, of poor benefits, even loss.How eliminating the defective that the Copper Bearing Steel surface easily cracks, is this area problem demanding prompt solution.
Summary of the invention
The objective of the invention is the defective that easily cracks in order to eliminate the Copper Bearing Steel surface, especially the defective that cracks of the base of cupric Yi shape steel and material surface, intensity, low-temperature impact toughness and the over-all properties of raising and stable high-strength weathering Yi shape steel provide a kind of method that prevents that Copper Bearing Steel from cracking.
Method of the present invention is: add metallic nickel in the Copper Bearing Steel smelting process, the ambrose alloy mole ratio is more than or equal to 1.
Preferably, the quality of the metallic nickel that adds in the steel equates with the quality of copper in the steel, and namely the ambrose alloy mass ratio is 1:1 in the steel.
Principle of the present invention is: add the nickel metal in Copper Bearing Steel, make the ambrose alloy mole ratio more than or equal to 1, thereby all coppers all are combined to the high-melting-point corronel with nickel element in the assurance steel, have avoided steel and have caused steel billet or stocking to crack because the copper fusing point is low in smelting, continuous casting, heating and the operation of rolling; And then stablized, improved or improved relevant therewith steel performance; Make ambrose alloy mole ratio in the steel reach requirement more than or equal to 1, need make the mass percent ratio of ambrose alloy in the steel reach certain value.Because copper is more bigger than nickle atom amount, add nickel and the copper metal of identical weight in the steel, namely the mass percent ratio of ambrose alloy is 1, just can reach requirement, makes the complete and nickel combination reaction of copper in the steel, purpose is to make the copper that does not have unbound state in the steel.
Advantage of the present invention is: only add in the smelting process into a kind of metal of nickel, the kind that increases alloy is few; Together add with copper and other alloy, the adding method is simple, does not increase process cost; The successful of eliminating crackle is effective; The corrosion resistance nature of copper still works, and has also improved simultaneously the over-all properties (such as intensity, low-temperature impact toughness etc.) of steel, kills two birds with one stone.
Embodiment
310 Yi shape steels with atmospheric corrosion resistance of Baogang's first production, the steel grade that adopts is 09CuPTiRE, owing to not adding nickel element in the steel, steel billet and Yi shape steel surface crack, owing to cupric, billet heating temperature is also low simultaneously, rolling also difficulty, the removing surface workload is larger, and lumber recovery is less than 50%.Production practice all the time also prove, because the defective in the 09CuPTiRE design does not add nickel, steel billet and Yi shape steel finished product all have crackle, and especially steel billet is more serious, and some steel billet is more also declared useless owing to crackle.
Cupronickel itself is high-meltiing alloy.Add nickel in the Copper Bearing Steel, eliminated the deleterious effect of low melting-point coper.
Sem energy spectrum analysis shows that the copper of unbound state is arranged with cracks in the matrix in the 09CuPTiRE steel.This is the major reason that cracks.
Baogang has researched and developed high-strength weathering 310 Yi shape steels of YQ450NbRE, two steel grades of YQ450NQR1 subsequently, in YQ450NbRE, two steel grades of YQ450NQR1, the one-tenth of copper, nickel is grouped into and is: the weight of copper percentage composition is 0.25～0.40%, and the nickel weight percentage is 0.25～0.40%; Other is five large elements in the steel and necessary alloying element, iron and inevitable impurity.From Composition Design and optimizing process, just consider to add excessive nickel metal, make that copper all is combined to the high-melting-point cupronickel with nickel element in the steel, just do not have the copper metal of unbound state in the steel, thereby eliminated steel billet and Yi shape steel surface crack.Add excessive nickel metal and copper in the steel and be combined to the high-melting-point corronel, just as having added superalloy in the steel, not only eliminated the defective that copper easily cracks in steel, and the corrosion resistance nature of copper still works, and also improves and stablized simultaneously the over-all properties (such as intensity, low-temperature impact toughness etc.) of steel.
YQ450NbRE, two steel grades of YQ450NQR1, adopt continuous casting process to produce after, lumber recovery all reach 90% with.High-strength weathering 310 Yi shape steels that adopt above-mentioned two steel grades to produce have satisfied the high speed of rail vehicle factory development, the demand of heavily loaded new model.
Claims (2)
1. method that prevents that Copper Bearing Steel from cracking, it is characterized in that: add metallic nickel in the Copper Bearing Steel smelting process, the ambrose alloy mole ratio is more than or equal to 1.
2. the method that prevents that Copper Bearing Steel from cracking according to claim 1, it is characterized in that: the quality of the metallic nickel that adds in the steel equates with the quality of copper in the steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104639814A CN102912217A (en) | 2012-11-16 | 2012-11-16 | Method for preventing copper-containing steel from cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104639814A CN102912217A (en) | 2012-11-16 | 2012-11-16 | Method for preventing copper-containing steel from cracking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102912217A true CN102912217A (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104639814A Pending CN102912217A (en) | 2012-11-16 | 2012-11-16 | Method for preventing copper-containing steel from cracking |
Country Status (1)
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| CN (1) | CN102912217A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392196A (en) * | 2011-11-15 | 2012-03-28 | 内蒙古包钢钢联股份有限公司 | High-strength high-tenacity rare earth-containing steel material for Z-type steels |
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2012
- 2012-11-16 CN CN2012104639814A patent/CN102912217A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392196A (en) * | 2011-11-15 | 2012-03-28 | 内蒙古包钢钢联股份有限公司 | High-strength high-tenacity rare earth-containing steel material for Z-type steels |
Non-Patent Citations (2)
| Title |
|---|
| 刘莉等: "310乙字钢开裂原因分析", 《物理测试》 * |
| 程德富等: "高耐候310乙字钢试制", 《包钢科技》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |