CN107904517A - 一种合金钢管的制备方法 - Google Patents
一种合金钢管的制备方法 Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
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- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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Abstract
本发明公开了一种合金钢管的制备方法,按下述步骤进行:①连铸:采用连铸法制作钢锭,并快速冷却到室温;钢锭的质量百分比由以下组分制成,碳C:0.8~1.1%,钒V:0.14~0.34%,锰Mn:0.63~0.88%,铬Cr:0.90~1.20%,镍Ni:0.10~0.25%,锡Sn:0.03~0.05%,钼Mo:0.15~0.32%,钛Ti:0.4~1.0%;其余为铁;②轧制钢管:对钢锭进行加热,以60℃/min的加热速度加热至1250℃,冷却到室温,终轧温度880‑890℃;采用管轧制机制管法进行穿孔和延伸轧制;③淬火:将钢管加热至1000‑1050℃,插入到搅拌水槽中进行水淬,以40‑45℃/s的冷却速度冷却至150℃;④回火:回火温度为220‑250℃,时间为2‑3小时。
Description
技术领域
本发明涉及一种钢管制备方法,特别是一种合金钢管的制备方法。
背景技术
目前,在建筑行业内的混凝土输送装置等设备上广泛需求一种混凝土输送管的合金钢管。一方面要求这种钢管硬度高而不易磨穿,另一方面对管件整体重量有限制,不能因为设置耐磨层而使壁厚太厚。在现有技术中,一般处理方法是先要将钢管整体放入淬火炉中淬火以提高管体的硬度,但是这会使得管体变脆,强度减低增加了工作中的危险性。
发明内容
本发明的目的在于,提供一种合金钢管的制备方法。本发明既能使钢管硬度较高而耐磨,又能保证钢管的韧性。
本发明的技术方案:一种合金钢管的制备方法,其特征在于,按下述步骤进行:
①连铸:采用连铸法制作钢锭,并快速冷却到室温;钢锭的质量百分比由以下组分制成,碳C:0.8~1.1%,钒V:0.14~0.34%,锰Mn:0.63~0.88%,铬Cr:0.90~1.20%,镍Ni:0.10~0.25%,锡Sn:0.03~0.05%,钼Mo:0.15~0.32%,钛Ti:0.4~1.0%;其余为铁;
②轧制钢管:对钢锭进行加热,以60℃/min的加热速度加热至1250℃,冷却到室温,终轧温度880-890℃;采用管轧制机制管法进行穿孔和延伸轧制;
③淬火:将钢管加热至1000-1050℃,插入到搅拌水槽中进行水淬,以40-45℃/s的冷却速度冷却至150℃;
④回火:回火温度为220-250℃,时间为2-3小时。
前述的合金钢管的制备方法中,所述步骤④中的回火温度为240℃,时间为2.5小时。
与现有技术相比,本发明通过限定合金钢管的元素成本以及优化各阶段工艺步骤及参数,克服了传统工艺的问题,使得本发明既能使钢管硬度较高而耐磨,又能保证钢管的韧性。本发明通过添加不同的合金元素及控制合金元素的添加量,提高成品合金钢管的硬度及强度。钢管抗拉强度可达1500MPa,硬度可达46HRC;所述合金钢管在不增加耐磨层厚度的情况下,大大提高了钢管内壁的耐磨性,其输送能力达30000m3以上。
具体实施方式
下面结合实施例对本发明作进一步的说明,但并不作为对本发明限制的依据。
实施例。一种合金钢管的制备方法,其特征在于,按下述步骤进行:
①连铸:采用连铸法制作钢锭,并快速冷却到室温;钢锭的质量百分比由以下组分制成,碳C:0.8~1.1%,钒V:0.14~0.34%,锰Mn:0.63~0.88%,铬Cr:0.90~1.20%,镍Ni:0.10~0.25%,锡Sn:0.03~0.05%,钼Mo:0.15~0.32%,钛Ti:0.4~1.0%;其余为铁;
②轧制钢管:对钢锭进行加热,以60℃/min的加热速度加热至1250℃,冷却到室温,终轧温度880-890℃;采用管轧制机制管法进行穿孔和延伸轧制;
③淬火:将钢管加热至1000-1050℃,插入到搅拌水槽中进行水淬,以40-45℃/s的冷却速度冷却至150℃;
④回火:回火温度为220-250℃,时间为2-3小时。
所述步骤④中的回火温度为240℃,时间为2.5小时。
本发明通过限定合金钢管的元素成本以及优化各阶段工艺步骤及参数,克服了传统工艺的问题,使得本发明既能使钢管硬度较高而耐磨,又能保证钢管的韧性。本发明通过添加不同的合金元素及控制合金元素的添加量,提高成品合金钢管的硬度及强度。钢管抗拉强度可达1500MPa,硬度可达46HRC;所述合金钢管在不增加耐磨层厚度的情况下,大大提高了钢管内壁的耐磨性,其输送能力达30000m3以上。
Claims (2)
1.一种合金钢管的制备方法,其特征在于,按下述步骤进行:
①连铸:采用连铸法制作钢锭,并快速冷却到室温;钢锭的质量百分比由以下组分制成,碳C:0.8~1.1%,钒V:0.14~0.34%,锰Mn:0.63~0.88%,铬Cr:0.90~1.20%,镍Ni:0.10~0.25%,锡Sn:0.03~0.05%,钼Mo:0.15~0.32%,钛Ti:0.4~1.0%;其余为铁;
②轧制钢管:对钢锭进行加热,以60℃/min的加热速度加热至1250℃,冷却到室温,终轧温度880-890℃;采用管轧制机制管法进行穿孔和延伸轧制;
③淬火:将钢管加热至1000-1050℃,插入到搅拌水槽中进行水淬,以40-45℃/s的冷却速度冷却至150℃;
④回火:回火温度为220-250℃,时间为2-3小时。
2.根据权利要求1所述的合金钢管的制备方法,其特征在于:所述步骤④中的回火温度为240℃,时间为2.5小时。
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102712963A (zh) * | 2010-01-22 | 2012-10-03 | 杰富意钢铁株式会社 | 高碳热轧钢板的制造方法 |
CN103725859A (zh) * | 2013-11-30 | 2014-04-16 | 常熟市东鑫钢管有限公司 | 无缝钢管的制造方法 |
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CN102712963A (zh) * | 2010-01-22 | 2012-10-03 | 杰富意钢铁株式会社 | 高碳热轧钢板的制造方法 |
CN103725859A (zh) * | 2013-11-30 | 2014-04-16 | 常熟市东鑫钢管有限公司 | 无缝钢管的制造方法 |
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