CN107747097A - 一种钢管的热加工工艺 - Google Patents

一种钢管的热加工工艺 Download PDF

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CN107747097A
CN107747097A CN201710944595.XA CN201710944595A CN107747097A CN 107747097 A CN107747097 A CN 107747097A CN 201710944595 A CN201710944595 A CN 201710944595A CN 107747097 A CN107747097 A CN 107747097A
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steel pipe
stove
heated
incubated
technique
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王卫东
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Xuzhou Dongpeng Tools Manufacturing Co Ltd
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Xuzhou Dongpeng Tools Manufacturing Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
    • C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
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  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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Abstract

一种钢管的热加工工艺，包括以下步骤：（1）清洗、（2）真空热处理净化、（3）化学镀镍、（4）热轧正火态的组织及硬度、（5）球化退火工艺、（6）淬火回火工艺。钢管在斜轧穿孔时，毛管内表面金属变形剧烈，若其内部组织不好，则容易产生裂纹、内折等缺陷。采用锻坯、轧坯可以改善铸坯内部组织，提高塑性，消除穿孔时内表面的缺陷，但是无疑又增大了生产成本。本发明热加工过的钢管，相比市面上一般的钢板，具有韧性高，硬度高，耐腐蚀不怕淋雨等特点。

Description

一种钢管的热加工工艺
技术领域
本发明涉及金属热处理工艺，尤其是一种钢管的热加工工艺。
背景技术
目前，公知的钢管一般采用加热到 1160-1180℃，经穿孔生产为热轧管；或轧管球化退火后，再经冷轧、冷拔工艺生产出规格较小且精度更高的冷轧、冷拔管。现阶段高强度钢的热处理工序是在普通箱式炉中进行的，表面容易氧化、脱碳。如果表面的油脂不能完全清洗干净，加热后零件表面容易发生积碳，这些都会导致镀前酸洗量增大，容易造成基体在清洗的过程中大量渗氢且不易析出。钢管在斜轧穿孔时，毛管内表面金属变形剧烈，若其内部组织不好，则容易产生裂纹、内折等缺陷。采用锻坯、轧坯可以改善铸坯内部组织，提高塑性，消除穿孔时内表面的缺陷，但是无疑又增大了生产成本。
发明内容
针对现有技术中的上述不足，本发明提供了一种钢管的热加工工艺。
为了达到上述发明目的，本发明采用的技术方案为：
一种钢管的热加工工艺，包括以下步骤：
（1）清洗：无水乙醇清洗钢管；
（2）真空热处理净化：在真空度为 5×10-3Pa 的条件下，以 280℃的温度加热 35 分钟，并保温 55 分钟后随炉冷却；
（3）化学镀镍：镀液的成分包括硫酸镍、次亚磷酸钠、柠檬酸钠和丁二酸，所述镀液中含镍量为 5.8g/ L，温度为90-95℃，pH值为4.8-5.0；
（4）热轧正火态的组织及硬度 ：钢管的终轧温度为 820-840℃
（5）球化退火工艺 ：球化退火工艺加热到 800-810℃，保温 4-5h，然后关闭炉子，随炉冷
却到550℃左右，出炉空冷；
（6）淬火回火工艺 ：淬火工艺加热到 830-840℃，保温 30min，油淬，淬火组织为马氏体+颗粒状碳化物+残留奥氏体，低温回火工艺加热到180-185℃，保温2-4h，出炉空冷。
本发明的优点：本发明热加工过的钢管，相比市面上一般的钢板，具有韧性高，硬度高，耐腐蚀不怕淋雨等特点。
具体实施方式
为使本发明的技术手段、工艺特征更加直观，下面结合具体的实施方式，进一步的来阐明。
一种钢管的热加工工艺，包括以下步骤：
（1）清洗：无水乙醇清洗钢管；
（2）真空热处理净化：在真空度为 5×10-3Pa 的条件下，以 280℃的温度加热 35 分钟，并保温 55 分钟后随炉冷却；
（3）化学镀镍：镀液的成分包括硫酸镍、次亚磷酸钠、柠檬酸钠和丁二酸，所述镀液中含镍量为 5.8g/ L，温度为90-95℃，pH值为4.8-5.0；
（4）热轧正火态的组织及硬度 ：钢管的终轧温度为 820-840℃
（5）球化退火工艺 ：球化退火工艺加热到 800-810℃，保温 4-5h，然后关闭炉子，随炉冷
却到550℃左右，出炉空冷；
（6）淬火回火工艺 ：淬火工艺加热到 830-840℃，保温 30min，油淬，淬火组织为马氏体+颗粒状碳化物+残留奥氏体，低温回火工艺加热到180-185℃，保温2-4h，出炉空冷。
实施例1：一种钢管的热加工工艺，包括以下步骤：（1）清洗，用无水乙醇清洗钢管，利用无水乙醇作为有机溶剂，提升钢管的耐腐蚀性（2）真空热处理净化，在真空度为 5×10-3Pa 的条件下，在加热炉内以 280℃的温度加热 35 分钟，并保温 55 分钟后随炉冷却。（3）化学镀镍，将钢管均匀的浸入镀液中，镀液的成分包括硫酸镍、次亚磷酸钠、柠檬酸钠和丁二酸，镀液中含镍量为 5.8g/ L，温度为90-95℃，pH值为4.8-5.0。（4）热轧正火态的组织及硬度 ，利用加热炉进行钢管的正火，钢管的终轧温度为 820-840℃（5）球化退火工艺 ，在加热炉内球化退火工艺加热到 800-810℃，保温 4-5h，然后关闭炉子，随炉冷却到550℃左右，出炉空冷。（6）淬火回火工艺 ，在加热炉内淬火工艺加热到 830-840℃，保温30min，油淬，淬火组织为马氏体+颗粒状碳化物+残留奥氏体，然后再加热炉内低温回火加热到180-185℃，保温2-4h，出炉空冷。
凡在本发明专利的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明专利的保护范围之内。

Claims (1)

1.一种钢管的热加工工艺，其特征在于，包括以下步骤：
（1）清洗：无水乙醇清洗钢管；
（2）真空热处理净化：在真空度为 5×10-3Pa 的条件下，以 280℃的温度加热 35 分钟，并保温 55 分钟后随炉冷却；
（3）化学镀镍：镀液的成分包括硫酸镍、次亚磷酸钠、柠檬酸钠和丁二酸，所述镀液中含镍量为 5.8g/ L，温度为90-95℃，pH值为4.8-5.0；
（4）热轧正火态的组织及硬度 ：钢管的终轧温度为 820-840℃
（5）球化退火工艺 ：球化退火工艺加热到 800-810℃，保温 4-5h，然后关闭炉子，随炉冷却到550℃左右，出炉空冷；
（6）淬火回火工艺 ：淬火工艺加热到 830-840℃，保温 30min，油淬，淬火组织为马氏体+颗粒状碳化物+残留奥氏体，低温回火工艺加热到180-185℃，保温2-4h，出炉空冷。
CN201710944595.XA 2017-10-12 2017-10-12 一种钢管的热加工工艺 Pending CN107747097A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109439887A (zh) * 2018-12-21 2019-03-08 扬州龙川钢管有限公司 一种T/P92钢管δ铁素体控制方法
CN113083937A (zh) * 2021-03-25 2021-07-09 江西红睿马钢管股份有限公司 一种冷碾扩轴承用轴承钢管生产工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251185A (zh) * 2011-06-22 2011-11-23 山东省四方技术开发有限公司 钢管减径机或定径机用高铬轧辊制备方法及其高铬轧辊
CN102703910A (zh) * 2012-05-25 2012-10-03 浙江吉利汽车研究院有限公司杭州分公司 降低氢脆的热加工工艺方法
CN104232869A (zh) * 2013-03-25 2014-12-24 洛阳洛北重工机械有限公司 一种轴承钢管的热加工生产工艺
CN105465491A (zh) * 2015-12-14 2016-04-06 徐州徐工液压件有限公司 一种高精度防腐耐磨油管及其制作方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251185A (zh) * 2011-06-22 2011-11-23 山东省四方技术开发有限公司 钢管减径机或定径机用高铬轧辊制备方法及其高铬轧辊
CN102703910A (zh) * 2012-05-25 2012-10-03 浙江吉利汽车研究院有限公司杭州分公司 降低氢脆的热加工工艺方法
CN104232869A (zh) * 2013-03-25 2014-12-24 洛阳洛北重工机械有限公司 一种轴承钢管的热加工生产工艺
CN105465491A (zh) * 2015-12-14 2016-04-06 徐州徐工液压件有限公司 一种高精度防腐耐磨油管及其制作方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109439887A (zh) * 2018-12-21 2019-03-08 扬州龙川钢管有限公司 一种T/P92钢管δ铁素体控制方法
CN113083937A (zh) * 2021-03-25 2021-07-09 江西红睿马钢管股份有限公司 一种冷碾扩轴承用轴承钢管生产工艺

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