CN101603154B - New material of hot perforation top head of steel pipe - Google Patents
New material of hot perforation top head of steel pipe Download PDFInfo
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- CN101603154B CN101603154B CN2009100008869A CN200910000886A CN101603154B CN 101603154 B CN101603154 B CN 101603154B CN 2009100008869 A CN2009100008869 A CN 2009100008869A CN 200910000886 A CN200910000886 A CN 200910000886A CN 101603154 B CN101603154 B CN 101603154B
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Abstract
The invention relates to a new material of a hot perforation top head of a steel pipe, comprising the following components according to chemical constituents and the weight percent: C 0.20 to 0.30, Si 0.20 to 1.20, Mn 0.40 to 0.60, Cr 0.50 to 0.80, Ni 0.90 to 1.20, Mo 0.90 to 1.20, W 1.80 to 2.20, Al 1.0 to 2.0, Ce 0.02 to 0.05 and the balance of iron and inevitable trace impurities. Because the content of Mo and W elements is increased and a proper amount of Al and a proper amount of rare earth element Ce (cerium) are also added, the strength, the wear-resistant property, the hardness, the plasticity and the thermal stability of the material are enhanced, a dense oxidation film is formed on the surface of a top head manufactured by using the material after heat treatment, and the service life of each top head can reach 520 to 640 times.
Description
Technical field
The present invention relates to a kind of ferrous alloy, particularly a kind of novel material that is applied to hot perforation top head of steel pipe.
Background technology
Perforating head is the crucial tool and mould in the seamless steel tube production; The temperature of its work is about 1000 ℃; And the thermal stresses that will bear huge axle pressure, radial pressure, spin friction power, rapid heat cycle; Its quality quality, the length in work-ing life all have material impact to quality, production efficiency and factory's benefit of weldless steel tube, and therefore develop high quality, long-life perforating head all is an important problem in the seamless steel tube production all the time.
China uses more top material at present has structural alloy steel, hot-work die steel and molybdenum alloy.The top that traditional 3Cr2W8V high alloy die steel is processed, though higher hardness and intensity are at high temperature arranged, toughness and plasticity are relatively poor, easy of crack and heat crack under the rapid heat cycle Working environment, work-ing life is shorter, and use cost is also higher.Though the top that molybdenum alloy is processed has use properties preferably, its cost is too high.And being widely used in the 15Cr2Ni3MoW steel of seamless steel pipe hot-rolling perforating head at present, its chemical ingredients and weight percent are: C 0.15-0.19, Si 0.50-0.80; Mn 0.40-0.50, Cr 1.50-1.80, Ni 2.4-2.8; Mo 0.40-0.50, W 0.16-0.19, this material is machining again after smelting, cast, forge into the perforating head base; After oxidizing thermal treatment, use; Though it can make the tissue of top improve, and has good obdurability, " nose collapses ", " steel bonding " phenomenon take place when wearing steel easily.
Summary of the invention
The purpose of this invention is to provide the new material of hot perforation top head of steel pipe that over-all propertieies such as a kind of hardness, intensity, toughness, plasticity and thermal fatigue property improve greatly; The hot perforation top head of steel pipe that uses the present invention to make is not only economical and practical, and can reach work-ing life more than 520-640 time/.
Technical scheme of the present invention is following:
A kind of new material of hot perforation top head of steel pipe, the weight percent of its moity and each component is: C 0.20-0.30, Si 0.20-1.20; Mn 0.40-0.60, Cr 0.50-0.80, Ni 0.90-1.20; Mo 0.90-1.20, W 1.80-2.20, Al 1.0-2.0; Ce 0.02-0.05, surplus is iron and inevitable trace impurity.
And the optimum embodiment of the present invention is that the weight percent of its moity and each component is: C 0.25, and Si 1.0, and Mn 0.50, and Cr 0.80, and Ni 1.0, and Mo 1.0, and W 2.0, and Al 1.50, and Ce 0.05, and surplus is iron and inevitable trace impurity.
The present invention is on the basis of low alloy steel; Utilize REE microalloying principle research and development to form, not only cost is lower to use the hot perforation top head of steel pipe that novel material of the present invention makes, for enterprise has practiced thrift resource; Also has the excellent comprehensive performance simultaneously; The hot perforation top head of steel pipe life-span of work-ing life than 15Cr2Ni3MoW steel is more than doubled, and also reduced the frequency of changing the top, improved the production efficiency of enterprise greatly.Design considerations of the present invention is:
1, C content (weight percent, below all with) is 0.20-0.30, and C is a carbide forming element, can improve the hardness of material, and content is too high then to be unfavorable for carrying out oxidizing thermal treatment;
2, Cr and Si can improve the hot hardness and the intensity of steel, the stagnation point that improves steel simultaneously, and to improve the thermal fatigue resistance of steel, a spot of Cr also can improve the toughness of material, and generally between 0.50-0.80, the content of Si is 0.20-1.20 to its content;
3, the content of Ni is 0.90-1.20, and the adding of minor amount of nickel element can improve the toughness of material;
4, Mn can improve the hardening capacity and the heat resistance of steel, can also eliminate the harmful effect of impurity S in the steel, but too high levels can make thermal conductivity reduce, and its content is generally 0.40-0.60.
5, Mo and the W element more more in alloy, have been added than ordinary low-alloy steel content.The Mo constituent content is 0.90-1.20; The W constituent content is 1.80-2.20, and these two kinds of elements all are the strong carbide forming elements, and the content that increases Mo and W is strengthened tissue; Improve heat resistance ability, wear resisting property and thermostability simultaneously, the life-span of top can be greatly improved.
6, add Al and rare earth element ce (cerium) simultaneously, wherein the content of Al is 1.0-2.0, and Al ability crystal grain thinning is controlled the temperature that crystal grain begins alligatoring, can effectively improve the grindability ability and the hot strength of steel; The content of Ce is 0.02-0.05, and micro-Ce is the ability cleaning molten steel in steel, removes the detrimental impurity of crystal boundary enrichment; Make tissue, the performance of top obtain best the improvement; Also between crystal grain and alloy liquid, form surface-active film simultaneously, stop the grain growth that generates, make the alloy organizing refinement; It is fine and close to add the sull of surface after oxide treatment that makes the top in the time of Al and Ce; And it is firm with the top matrix bond; Improved the hot strength, hardness, plasticity, wear resistance and the thermal fatigue property that come directly towards simultaneously, made the life-span ratio of the top of adopting novel material making of the present invention adopt the life-span of the top of 15Cr2Ni3MoW steel work to increase more than 1 times.
The present invention has suitably increased the content of Mo and W on the low-alloy basis; Added Al and rare earth element ce simultaneously, with to adopt high quality steel to compare cost lower, but the work-ing life of the top that makes is longer; Both, also improved the production efficiency of enterprise simultaneously for enterprise has practiced thrift cost.
According to embodiment the present invention is done further explain below.
Embodiment
New material of hot perforation top head of steel pipe of the present invention, the weight percent of its moity and each component is: C 0.20-0.30, Si 0.20-1.20; Mn 0.40-0.60, Cr 0.50-0.80, Ni 0.90-1.20; Mo 0.90-1.20, W 1.80-2.20, Al 1.0-2.0; Ce 0.02-0.05, surplus is iron and inevitable trace impurity.
As the optimized embodiment of new material of hot perforation top head of steel pipe of the present invention, component and weight percent content that embodiments of the invention 1 are adopted are specially: C 0.25, and Si 1.0; Mn 0.50, and Cr 0.80, and Ni 1.0; Mo 1.0, and W 2.0, and Al 1.50; Ce 0.05, and surplus is iron and inevitable trace impurity.
Adopt the step of novel material manufacturing of the present invention top to be: 1, no surplus precision casting shell mould; 2, alloy is prepared burden by required composition and content; 3, the good composition of will preparing burden is smelted, is poured into a mould, and obtains high-precision top after the curing; 4, annealing thermal treatment, the annealing insulation was 3 hours when the top after solidifying was heated to 880 ℃, subsequently with stove air cooling to 350 ℃; 5, carry out the little processing of fitting surface; 6, surface oxidation thermal treatment will come directly towards the surface and be heated to 950 ℃ rapidly, and 4 hours air coolings or oil quenching promptly obtain the finished product top then.
Novel material manufacturing of the present invention top is to adopt fusible pattern not have the cast of surplus casting method to form, and does not need mechanical workout basically, can the fine and close close grain layer of retention surface.The application of novel material simultaneously adds that surface heat treatment process makes the surface, top form the fine and close sull of one deck, and this layer compact structure improves top thermal fatigue property in perforation procedure greatly, both improved the work-ing life of top, also omitted machining processes.Simultaneously because the interpolation of Al and rare earth element ce (cerium), make the top after thermal treatment more refinement tissue, improved the bonding force that comes directly towards surface film oxide and matrix.
In the top poling test that novel material of the present invention is made, diameter is a top Drawing cone smooth surface behind the top poling 350 times of 108mm, no change; Continue poling 285 times; Fatigue cracking just appears in the Drawing cone of top, and the poling number of times reaches 635 times/, and the top of diameter 142mm also reaches in actual poling more than 520 times/; The top poling test of other model has also all reached identical excellent effect; Improved more than 2 times 150 times/work-ing life only than the top of generally adopting at present, also improved more than 1 times than the 250 times/life-span only of the top of better performances, the cost of top is also lower simultaneously; In extensive seamless steel tube production,, the production efficiency and the economic benefit of enterprise have also been improved simultaneously for enterprise has practiced thrift a large amount of expenditures.
Claims (2)
1. a new material of hot perforation top head of steel pipe is characterized in that, the composition of this material (weight %) is: C 0.20-0.30; Si 0.20-1.20, Mn 0.40-0.60, Cr 0.50-0.80; Ni 0.90-1.20, Mo 0.90-1.20, W 1.80-2.20; Al 1.0-2.0, Ce 0.02-0.05, surplus is iron and inevitable trace impurity.
2. new material of hot perforation top head of steel pipe according to claim 1 is characterized in that, the composition of this material (weight %) is: C 0.25, and Si 1.0; Mn 0.50, and Cr 0.80, and Ni 1.0, and Mo 1.0; W 2.0, and Al 1.50, and Ce 0.05, and surplus is iron and inevitable trace impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100008869A CN101603154B (en) | 2009-01-20 | 2009-01-20 | New material of hot perforation top head of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100008869A CN101603154B (en) | 2009-01-20 | 2009-01-20 | New material of hot perforation top head of steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101603154A CN101603154A (en) | 2009-12-16 |
| CN101603154B true CN101603154B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100008869A Expired - Fee Related CN101603154B (en) | 2009-01-20 | 2009-01-20 | New material of hot perforation top head of steel pipe |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337472A (en) * | 2011-09-30 | 2012-02-01 | 内蒙古包钢钢联股份有限公司 | Heat treatment method for piercing point of seamless pipe |
| EP2875876B1 (en) | 2012-07-20 | 2017-05-03 | Nippon Steel & Sumitomo Metal Corporation | Piercing plug |
| CN103451551B (en) * | 2013-08-30 | 2015-07-01 | 北京工业大学 | Preparation method of cast steel perforator top tip with high-temperature resistance and corrosion resistance |
| CN105734392A (en) * | 2016-03-14 | 2016-07-06 | 昆山一邦泰汽车零部件制造有限公司 | Preparation method of wear resistant vehicle door handle |
| CN107058907B (en) * | 2017-03-17 | 2018-09-28 | 合肥天舟光伏技术有限公司 | A kind of casting technique of U-shaped steel photovoltaic bracket |
| CN112881121A (en) * | 2021-01-15 | 2021-06-01 | 常州宝菱重工机械有限公司 | Method for evaluating surface oxidation film of steel pipe piercing plug |
| CN112899564A (en) * | 2021-01-15 | 2021-06-04 | 常州宝菱重工机械有限公司 | Steel pipe piercing plug and preparation method thereof |
-
2009
- 2009-01-20 CN CN2009100008869A patent/CN101603154B/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| JP特开2001-355034A 2001.12.25 |
| 王斌等..无缝钢管穿孔顶头失效形式分析及提高使用寿命的研究进展.《材料导报》.2006,第20卷(第6期),82-84. * |
| 王斌等。.无缝钢管穿孔顶头失效形式分析及提高使用寿命的研究进展.《材料导报》.2006,第20卷(第6期),82-84. |
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| CN101603154A (en) | 2009-12-16 |
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