WO2019047587A1 - 高抗挤sew石油套管用热连轧钢卷及其生产方法 - Google Patents

高抗挤sew石油套管用热连轧钢卷及其生产方法 Download PDF

Info

Publication number
WO2019047587A1
WO2019047587A1 PCT/CN2018/091943 CN2018091943W WO2019047587A1 WO 2019047587 A1 WO2019047587 A1 WO 2019047587A1 CN 2018091943 W CN2018091943 W CN 2018091943W WO 2019047587 A1 WO2019047587 A1 WO 2019047587A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
steel coil
hot
rolled steel
production method
Prior art date
Application number
PCT/CN2018/091943
Other languages
English (en)
French (fr)
Inventor
张开华
叶晓瑜
熊雪刚
王羿
Original Assignee
攀钢集团攀枝花钢铁研究院有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 攀钢集团攀枝花钢铁研究院有限公司 filed Critical 攀钢集团攀枝花钢铁研究院有限公司
Priority to EP18854330.0A priority Critical patent/EP3683326A4/en
Priority to US16/614,603 priority patent/US11466333B2/en
Publication of WO2019047587A1 publication Critical patent/WO2019047587A1/zh

Links

Images

Classifications

    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C22C38/04—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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

Definitions

  • the invention relates to a hot-rolled steel coil, in particular to a hot-rolled steel coil for high anti-extrusion SEW oil casing, which belongs to the technical field of hot continuous rolling production.
  • the invention also relates to a method of producing a hot rolled steel coil.
  • Oil casing is an important pipeline material in the oil and natural gas exploitation process, and is an indispensable construction material in oil and gas field drilling operations. Especially in recent years, the drilling of deep wells and ultra-deep wells has put forward higher requirements on the performance of oil casings. The demand for high-resistance casings is increasing, and the strength level is also getting higher and higher. In the past, high-resistance casings mainly used seamless pipes, but they had shortcomings such as large wall thickness deviation, uneven performance, low resistance to opportunity, and rapid perforation and casing damage, which seriously affected the quality and efficiency of oil well drilling and mining.
  • the production process of the steel coil, and finally the yield strength of the steel pipe is 720-760 MPa, the tensile strength is 820 MPa or more, and the yield strength is low; for example, the N80, P110, L80 steel grade straight seam disclosed in the patent application No. 200910018524.2
  • the chemical composition is C: 0.10% to 0.28%, Si: 0.12% to 0.25%, Mn: 1.10% to 1.60%, P: 0.03 to 0.14%, S: 0.002 to 0.03%, Cr: 0.20% to 0.70%, Nb: 0.07% to 0.17%, V: 0.05% to 0.15%, and Ti: 0.10 to 0.22%.
  • the expensive Nb and V in this patent are added in many places, and the alloy cost is high.
  • the application number is 201310468738.6
  • the P110 grade straight seam oil casing and the manufacturing method thereof have the chemical composition C: 0.24% to 0.28%, Si: 0.15% to 0.30%, Mn: 1.25% to 1.50%, P ⁇ 0.020%, S ⁇ 0.008%, V:0.05%-0.08%, Ti:0.010-0.30%
  • the patent is added to V, and the strength of the oil casing is improved by the precipitation strengthening of V, but the alloy cost is still high, and the heat of the invention is
  • the yield strength of the rolled coil is above 570 MPa, which brings great difficulty to the subsequent welded pipe.
  • the yield strength of the welded pipe is 780 MPa-850 MPa and the tensile strength is 880-970 MPa.
  • the technical problem to be solved by the present invention is to provide a hot-rolled steel coil for high anti-extrusion SEW oil casing with low alloying element and excellent initial welding performance, and a method for producing the hot-rolled steel coil. Production method.
  • the technical solution adopted to solve the above technical problem is: a hot-rolled steel coil for high-extrusion SEW oil casing, wherein the hot-rolled steel coil is a continuous casting and rolling steel coil including the following chemical components.
  • the chemical composition is C: 0.22 to 0.32%, Si: 0.10 to 0.30%, Mn: 1.10 to 1.40%, Cr: 0.30 to 0.60%, P: ⁇ 0.020%, S: ⁇ 0.010%, Ti: 0.008 ⁇ 0.019%.
  • the rest are Fe and inevitable impurities,
  • the initial yield strength of the continuous casting and rolling steel coil is 340-360 MPa, and the initial tensile strength is 620-640 MPa; the yield strength of the continuous casting and rolling steel coil after quenching and tempering treatment is 840 MPa-910 MPa, and the tensile strength is 940-1030 MPa.
  • the chemical composition is C: 0.24 to 0.30%, Si: 0.10 to 0.30%, Mn: 1.20 to 1.40%, Cr: 0.40 to 0.50%, P: ⁇ 0.018%, and S: ⁇ 0.005%.
  • a production method for the hot-rolled steel coil wherein the production method comprises a continuous casting slab as an initial blank, and 5-7 passes of fine grain coarse rolling under the temperature-controlled heating condition The billet is further subjected to at least 4 passes of finish rolling, and finally cooled and coiled to complete the production and processing of the hot strip coil.
  • the deformation amount of each pass billet must be ⁇ 18%, and the thickness of the intermediate billet after refining the grain rough rolling is the thickness of the finished hot strip rolling coil. 3.8-4.2 times, the cooling before the finish rolling is cooled by air cooling.
  • the heating temperature is controlled at 1180 to 1220 °C.
  • a preferred mode of the above solution is that the thickness of the initial continuous casting slab is between 200 and 250 mm.
  • finish rolling the finish rolling of each pass is completed once by the finishing mill.
  • the inlet temperature during finish rolling is controlled between 970 and 1020 ° C, and the finishing temperature is in the range of 850 to 900 ° C.
  • the slab after the fine grain rough rolling is first introduced into the hot coil box to exchange the billet blank tails, and then unrolled into the finishing zone for temperature-controlled finish rolling.
  • the invention has the beneficial effects that the present application reduces the expensive alloying elements V and Mo, and strictly controls the expensive alloying element Cr, as well as Ti and Si, and then strictly controls the rolling production process, that is, continuously casting the slab
  • the intermediate blank is formed by 5-7 passes of fine grain coarse rolling under temperature-controlled heating conditions, and then the intermediate blank is subjected to at least 4 passes of finish rolling, and finally cooled and coiled to complete the The production and processing of hot rolled steel coils.
  • the deformation of the billet of each pass must be ⁇ 18%, so that the thickness of the intermediate billet after the refinement of the coarse grain is the hot-rolled steel coil of the finished product.
  • the thickness is 3.8-4.2 times, and the cooling before the finish rolling is completed is cooled by air cooling.
  • the existence of Cr which partially increases the strength of the material and improves the resistance of the material, not only reduces the production cost, but also ensures the mechanical properties of the material.
  • the purpose of improving the welding performance and mechanical properties of the hot-rolled steel coil provided by the present application can be achieved, that is, the initial yield strength of the continuous casting and rolling coil can be ensured to be 340.
  • the initial tensile strength is 620 ⁇ 640MPa, to ensure the excellent welding performance, and to ensure the finished product after welding;
  • the yield strength after quenching and tempering treatment is 840MPa ⁇ 910MPa, and the tensile strength is 940 ⁇ 1030MPa.
  • Fig. 1 is a metallographic structure diagram of a strip-shaped structure formed by hot-rolling of a hot-rolled steel coil for a high-extrusion SEW oil casing according to the present invention.
  • the present invention provides a hot-rolled steel coil for high anti-extrusion SEW oil casing with low alloying element and excellent initial welding performance, and the invention also provides a production method for production.
  • a method of producing the hot rolled steel coil is a continuous casting and rolling steel coil comprising the following chemical components, the chemical composition is C: 0.22 to 0.32%, Si: 0.10 to 0.30%, and Mn: 1.10 to 1.40%. , Cr: 0.30 to 0.60%, P: ⁇ 0.020%, S: ⁇ 0.010%, and Ti: 0.008 to 0.019%.
  • the balance is Fe and unavoidable impurities.
  • the initial yield strength of the continuous casting and rolling coil is 340-360 MPa, the initial tensile strength is 620-640 MPa, and the yield strength of the continuous casting and rolling coil is 840 MPa after quenching and tempering treatment. ⁇ 910MPa, tensile strength 940 ⁇ 1030MPa; the production method uses continuous casting slab as the initial blank, and after 5-7 passes of fine grain coarse rolling to form the intermediate blank under temperature-controlled heating conditions, The intermediate blank is subjected to at least 4 passes of finish rolling, and finally cooled and coiled to complete the production and processing of the hot strip rolling steel coil, wherein each pass is performed in the refining grain rough rolling process of each pass.
  • the deformation of the billet must be ⁇ 18%, and the thickness of the intermediate billet after refining the grain rough rolling is 3.8-4.2 times the thickness of the finished hot strip coil, and the cooling before the finish rolling is cooled by the air cooling method.
  • the present application reduces the expensive alloying elements V and Mo, and strictly controls the expensive alloying element Cr, as well as Ti and Si, and then strictly controls the rolling production process, that is, the continuous casting slab is used as the initial blank, and the temperature is controlled. After 5-7 passes of fine grain coarse rolling to form an intermediate blank under heating, the intermediate blank is subjected to at least 4 passes of finish rolling, and finally cooled and coiled to complete the production of the hot rolled steel coil. Processing work.
  • the deformation of the billet of each pass must be ⁇ 18%, so that the thickness of the intermediate billet after the refinement of the coarse grain is the hot-rolled steel coil of the finished product.
  • the thickness is 3.8-4.2 times, and the cooling before the finish rolling is completed is cooled by air cooling.
  • the existence of Cr which partially increases the strength of the material and improves the resistance of the material, not only reduces the production cost, but also ensures the mechanical properties of the material.
  • the purpose of improving the welding performance and mechanical properties of the hot-rolled steel coil provided by the present application can be achieved, that is, the initial yield strength of the continuous casting and rolling coil can be ensured to be 340.
  • the initial tensile strength is 620 ⁇ 640MPa, to ensure the excellent welding performance, and to ensure the finished product after welding;
  • the yield strength after quenching and tempering treatment is 840MPa ⁇ 910MPa, and the tensile strength is 940 ⁇ 1030MPa.
  • Mechanical behavior As shown in FIG.
  • FIG. 1 it is a metallographic structure diagram of a strip-shaped structure formed by air-cooling of a hot-rolled steel coil for high anti-extrusion SEW oil casing of the present application, and the metallographic structure of the strip-like structure is formed for controlling the post-heat treatment. Do not use too much strength.
  • the present application provides a hot-rolled steel coil having a more stringent chemical composition component, that is, The chemical composition is C: 0.24 to 0.30%, Si: 0.10 to 0.30%, Mn: 1.20 to 1.40%, Cr: 0.40 to 0.50%, P: ⁇ 0.018%, S: ⁇ 0.005%, Ti: 0.010 to 0.017 %, the rest are Fe and inevitable impurities.
  • the chemical composition is C: 0.24 to 0.30%, Si: 0.10 to 0.30%, Mn: 1.20 to 1.40%, Cr: 0.40 to 0.50%, P: ⁇ 0.018%, S: ⁇ 0.005%, Ti: 0.010 to 0.017 %, the rest are Fe and inevitable impurities.
  • the heating temperature is controlled at 1180 ⁇ 1220 ° C; the thickness of the initial continuous casting slab is 200 Between ⁇ 250mm; in the finishing rolling, the finishing rolling of each pass is completed once by the finishing mill; the inlet temperature during finishing rolling is controlled between 970 and 1020 °C, and the finishing rolling temperature ranges from 850 to 900 °C; After the fine grain rough rolling, the slab first enters the hot coil box to carry out the coil blank tail exchange and coiling, and then unwinds into the finishing rolling zone for temperature-controlled finishing rolling.
  • the present application fully utilizes the role of trace alloying elements in the finished steel plate, that is, fully utilizes C, Si, Mn, Cr and Mo as the alloy components instead of the impurity content control to adjust the performance of the finished steel plate.
  • the role of various trace alloying elements in the finished steel sheet is as follows:
  • Mn austenite forming element, which can improve the hardenability of steel, solid solution strengthening effect in steel, increase the strength of steel, and lead to high structure and segregation, affecting impact and drop weight performance.
  • Cr is an element that strongly enhances hardenability, and is a strong precipitate forming element.
  • the heat treatment process window can be enlarged to form precipitates, and the strength of the steel is remarkably improved.
  • Mo Improve the stability of austenite, improve the stability of the heat treatment control process in the subsequent heat treatment process (expand the heat treatment process window); increase the strength of the steel by precipitation with V and Ti, and the effect of Mo on the precipitation phase Obviously, the ripening and growth of the precipitated phase can be suppressed, and the precipitation of 10 nm or less is controlled to be 70% or more.
  • the production process of the invention is: hot metal desulfurization ⁇ converter smelting composite blowing ⁇ deoxidation, alloying ⁇ LF electric heating ⁇ RH vacuum treatment ⁇ feeding calcium line ⁇ continuous casting ⁇ slab heating ⁇ high pressure water descaling ⁇ rough rolling ⁇ heat Coil take-up ⁇ finish rolling ⁇ laminar cooling ⁇ coiling ⁇ packaging into the warehouse.
  • High-extrusion SEW oil casings are hot-rolled steel coils. After conventional converter smelting and continuous casting, the chemical composition of the finished steel is: C: 0.22 ⁇ 0.32%, Si: 0.10 ⁇ 0.30%, Mn: 1.10 ⁇ 1.40%, Cr : 0.30 to 0.60%, P: ⁇ 0.020%, S: ⁇ 0.010% Ti: 0.008 to 0.019%. The rest are Fe and inevitable impurities.
  • the slab obtained by continuous casting is heated to 1180 ⁇ 1220°C for rough rolling.
  • the slab of 200-250mm thick is subjected to 5 passes or 7 passes of rough rolling, and the deformation amount per pass must be ⁇ 18%.
  • the thickness of the intermediate blank varies according to the thickness of the finished product, but the thickness of the intermediate blank must be more than 4 times the thickness of the finished product.
  • the rough-rolled slab is then subjected to hot-rolling, which may be, for example, a coreless transfer hot-roller.
  • hot-rolling which may be, for example, a coreless transfer hot-roller.
  • the intermediate blank head and tail exchange is realized in the hot coil box to ensure uniform temperature of the billet length; and the secondary iron oxide scale is removed to ensure smooth surface of the billet.
  • the intermediate billet is taken up by the hot coil box, it is displaced and unrolled, and enters the finishing rolling zone for finish rolling.
  • the finishing temperature of the finishing rolling is controlled at 970 to 1020 ° C, and the final rolling temperature range is 850-900 ° C.
  • the air cooling method is used for cooling. .
  • Table 1 is the chemical composition of five examples of the present invention
  • Table 2 is the hot rolling process control value
  • Table 3 is the mechanical properties of the steel coil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

一种高抗挤SEW石油套管用热连轧钢卷及其生产方法。该热连轧钢卷通过减少其中的昂贵合金元素Mo、V，并严格控制Cr、Mn以及Ti等化学元素的含量组分来降低生产成本。其生产方法以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯进行至少4个道次的精轧，最后进行冷却卷取来完成生产加工工作，达到控制其初始屈服强度和初始抗拉强度的目的。

Description

高抗挤SEW石油套管用热连轧钢卷及其生产方法 技术领域
本发明涉及一种热连轧钢卷，尤其是涉及一种高抗挤SEW石油套管用热连轧钢卷，属于热连轧生产技术领域。本发明还涉及一种用于生产所述热连轧钢卷的生产方法。
背景技术
石油套管是石油、天然气开采过程中的重要管线材料，是油气田钻井作业中必不可少的施工材料。特别是近年来，深井和超深井的钻探对石油套管的性能提出了更高的要求，高抗挤套管的需求量越来越大，其强度级别也越来越高。以前高抗击套管主要采用无缝管，但存在壁厚偏差大、性能不均匀、抗机会能力低、射孔开裂套损快等缺点，严重影响了油井钻探与开采的质量和效益。
近年来，研究和生产出了多种高抗挤直缝焊石油套管：比如专利申请号为201110427453.9的专利申请文件公开的一种高抗挤SEW石油套管及其制造方法中，其化学成分为C：0.25％～0.33％，Si：0.19％～0.28％，Mn：1.10％～1.30％，P≤0.020％，S≤0.008％，该专利只包括石油套管的生产工艺，没有石油套管用钢卷的生产工艺，而且最终钢管的屈服强度720-760MPa，抗拉强度820MPa以上，其屈服强度偏低；又比如专利申请号为200910018524.2的专利申请文件公开的N80、P110、L80钢级直缝直缝焊石油套管用钢及套管制造中，其化学成分为C：0.10％～0.28％，Si：0.12％～0.25％，Mn：1.10％～1.60％，P：0.03～0.14％，S：0.002～0.03％，Cr：0.20％～0.70％，Nb：0.07％～0.17％，V：0.05％～0.15％，Ti：0.10～0.22％，该专利中昂贵的Nb和V添加很多，合金成本高；再比如申请号为201310468738.6专利申请文件公开的一种P110级直缝石油套管及其制造方法中，其化学成分为C：0.24％～0.28％，Si：0.15％～0.30％，Mn：1.25％～1.50％，P≤0.020％，S≤0.008％，V：0.05％～0.08％，Ti：0.010～0.30％，该专利加入V，通过V的析出强化提高石油套管的强度，但其合金成本仍然偏高，同时该发明的热轧钢卷的屈服强度在570MPa以上，对后续的焊管带来了很大的难度，其焊管的屈服强度在780MPa-850MPa，抗拉强度880-970MPa。
为此，开发一种性能优良的高抗挤直缝焊石油套管已成为当务之急，对节约采油成本，提高石油开采水平有作深远的意义。采用低成本化的工艺路线，生产高抗挤SEW石油套管用热连轧钢卷，降低热轧钢卷的强度，有利于后续焊管的顺利进行，同时保证焊管调质处理的强度，便成为了本领域技术人员急需要解决的技术问题。
发明内容
本发明所要解决的技术问题是：提供一种合金元素成体低，初期焊接性能优良的高抗挤SEW石油套管用热连轧钢卷，本发明还提供了一种用于生产所述热连轧钢卷的生产方法。
为解决上述技术问题所采用的技术方案是：一种高抗挤SEW石油套管用热连轧钢卷，所述的热连轧钢卷为包括下述重量份化学组分的连铸连轧钢卷，
所述的化学组分为C：0.22～0.32％，Si：0.10～0.30％，Mn：1.10～1.40％，Cr：0.30～0.60％，P：≤0.020％，S：≤0.010％，Ti：0.008～0.019％。，其余为Fe和不可避免的杂质，
所述连铸连轧钢卷的初始屈服强度为340～360MPa，初始抗拉强度为620～640MPa；所述连铸连轧钢卷调质处理后的屈服强度840MPa～910MPa，抗拉强度940～1030MPa。
进一步的是，所述的化学组分为C：0.24～0.30％，Si：0.10～0.30％，Mn：1.20～1.40％，Cr：0.40～0.50％，P：≤0.018％，S：≤0.005％，Ti：0.010～0.017％，其余为Fe和不可避免的杂质。
一种用于所述热连轧钢卷的生产方法，所述的生产方法以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯进行至少4个道次的精轧，最后进行冷却卷取来完成所述热连轧钢卷的生产加工工作，
其中，在各个道次的细化晶粒粗轧过程中，每一个道次钢坯的变形量必须≥18％，经过细化晶粒粗轧后的中间坯的厚度为成品热连轧钢卷厚度的3.8-4.2倍，精轧完成卷取前的冷却为空冷方式冷却。
进一步的是，在进行各个道次的细化晶粒粗轧时，加热的温度控制在1180～1220℃。
上述方案的优选方式是，初始连铸板坯的厚度在200～250㎜之间。
进一步的是，在进行精轧时，各道次的精轧通过精轧机组一次完成。
进一步的是，精轧时的入口温度控制在970～1020℃之间，终轧温度范围为850～900℃。
进一步的是，经过细化晶粒粗轧后的板坯先进入热卷箱进行坯头坯尾互换卷取，然后再开卷进入精轧区进行控温精轧。
本发明的有益效果是：本申请通过减少价格昂贵的合金元素V和Mo，并严格控制价昂贵的合金元素Cr，以及Ti和Si，然后严格控制轧制生产工艺过程，即以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯 进行至少4个道次的精轧，最后进行冷却卷取来完成所述热连轧钢卷的生产加工工作。尤其是在各个道次的细化晶粒粗轧过程中，保证每一个道次钢坯的变形量必须≥18％，使经过细化晶粒粗轧后的中间坯的厚度为成品热连轧钢卷厚度的3.8-4.2倍，并在精轧完成卷取前的冷却采用空冷方式冷却。这样，由于有了部分增加材料强度、提高材料抗挤能力的Cr的存在，既达到了降低生产成本的目的，同时又能保证材料的机械性能。然后再辅以上述各工艺步骤的轧制参数，便可以达到提高本申请提供的热连轧钢卷的焊接性能以及机械性能的目的，即可以保证所述连铸连轧钢卷的初始屈服强度为340～360MPa，初始抗拉强度为620～640MPa，以保证其焊接性能优良，又能保证焊接完成后的成品；通过调质处理后的屈服强度840MPa～910MPa，抗拉强度940～1030MPa的十分优良的机械性能。
附图说明
图1为本发明高抗挤SEW石油套管用热连轧钢卷经空冷形成部分带状组织的金相组织图。
具体实施方式
为了解决现有技术中存在的上述技术问题，本发明提供的一种合金元素成体低，初期焊接性能优良的高抗挤SEW石油套管用热连轧钢卷，本发明还提供了一种用于生产所述热连轧钢卷的生产方法。所述的热连轧钢卷为包括下述重量份化学组分的连铸连轧钢卷，所述的化学组分为C：0.22～0.32％，Si：0.10～0.30％，Mn：1.10～1.40％，Cr：0.30～0.60％，P：≤0.020％，S：≤0.010％，Ti：0.008～0.019％。，其余为Fe和不可避免的杂质，所述连铸连轧钢卷的初始屈服强度为340～360MPa，初始抗拉强度为620～640MPa；所述连铸连轧钢卷调质处理后的屈服强度840MPa～910MPa，抗拉强度940～1030MPa；所述的生产方法以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯进行至少4个道次的精轧，最后进行冷却卷取来完成所述热连轧钢卷的生产加工工作，其中，在各个道次的细化晶粒粗轧过程中，每一个道次钢坯的变形量必须≥18％，经过细化晶粒粗轧后的中间坯的厚度为成品热连轧钢卷厚度的3.8-4.2倍，精轧完成卷取前的冷却为空冷方式冷却。本申请通过减少价格昂贵的合金元素V和Mo，并严格控制价昂贵的合金元素Cr，以及Ti和Si，然后严格控制轧制生产工艺过程，即以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯进行至少4个道次的精轧，最后进行冷却卷取来完成所述热连轧钢卷的生产加工工作。尤其是在各个道次的细化晶粒粗轧过程中，保证每一个道次 钢坯的变形量必须≥18％，使经过细化晶粒粗轧后的中间坯的厚度为成品热连轧钢卷厚度的3.8-4.2倍，并在精轧完成卷取前的冷却采用空冷方式冷却。这样，由于有了部分增加材料强度、提高材料抗挤能力的Cr的存在，既达到了降低生产成本的目的，同时又能保证材料的机械性能。然后再辅以上述各工艺步骤的轧制参数，便可以达到提高本申请提供的热连轧钢卷的焊接性能以及机械性能的目的，即可以保证所述连铸连轧钢卷的初始屈服强度为340～360MPa，初始抗拉强度为620～640MPa，以保证其焊接性能优良，又能保证焊接完成后的成品；通过调质处理后的屈服强度840MPa～910MPa，抗拉强度940～1030MPa的十分优良的机械性能。如附图1所示，是本申请的高抗挤SEW石油套管用热连轧钢卷经空冷形成部分带状组织的金相组织图，形成这样带状组织的金相结构是为了控制后期热处理前强度不要过高。
上述实施方式中，为了最大限度的提高本申请所述热连轧钢卷的焊接性能和机械性能，本申请提供了一种各个化学成分含量更为严格的组分的热连轧钢卷，即所述的化学组分为C：0.24～0.30％，Si：0.10～0.30％，Mn：1.20～1.40％，Cr：0.40～0.50％，P：≤0.018％，S：≤0.005％，Ti：0.010～0.017％，其余为Fe和不可避免的杂质。并进一步的对轧制生产过程中的相应工序做了调整，即在进行各个道次的细化晶粒粗轧时，加热的温度控制在1180～1220℃；初始连铸板坯的厚度在200～250㎜之间；在进行精轧时，各道次的精轧通过精轧机组一次完成；精轧时的入口温度控制在970～1020℃之间，终轧温度范围为850～900℃；经过细化晶粒粗轧后的板坯先进入热卷箱进行坯头坯尾互换卷取，然后再开卷进入精轧区进行控温精轧。本申请通过对组成成分的控制，充分利用微量合金元素在成品钢板中的作用，即充分利用C、Si、Mn、Cr以及Mo等元作为合金成分而不是杂质含量控制对成品钢板的性能调节作用达到改善成品钢板性能的目的。其中各种微量合金元素在成品钢板中的作用如下：
C：为碳化物形成元素，可以提高强度，但C含量过高易形成带状组织，本专利在控轧控冷工艺方面进行了最佳匹配，有效的抑制了带状组织形成。
Si：固溶于铁素体可以提高钢的屈服强度。过高会使加工和韧性恶化，且表面氧化铁皮为“红锈”，不易除鳞干净。
Mn：为奥氏体形成元素，可以提高钢的淬透性，在钢中起固溶强化作用，提高钢材强度，带过高易形成组织偏析，影响冲击和落锤性能。
Cr：是强烈提高淬透性的元素，是一种强析出物形成元素，后续热处理时，可扩大热处理工艺窗口，形成析出物，明显提高钢材强度。
Mo：提高奥氏体的稳定性，在后续热处理过程中，提高热处理控制工艺的稳定性(扩大热处理工艺窗口)；通过与V和Ti的析出，提高钢材强度，且Mo对析出相细化效果明显，可抑制析出相的熟化和长大，控制10nm以下的析出相比例在70％以上。
实施例
本发明的生产工艺流程为：铁水脱硫→转炉冶炼复合吹炼→脱氧、合金化→LF电加热→RH真空处理→喂钙线→连铸→板坯加热→高压水除鳞→粗轧→热卷箱卷取→精轧→层流冷却→卷取→包装入库。
高抗挤SEW石油套管用热连轧钢卷，通过常规转炉冶炼、连铸后，成品钢的化学成分为：C：0.22～0.32％，Si：0.10～0.30％，Mn：1.10～1.40％，Cr：0.30～0.60％，P：≤0.020％，S：≤0.010％Ti：0.008～0.019％。，其余为Fe和不可避免的杂质。
将连铸所得板坯加热到1180～1220℃保温粗轧，根据成品厚度的不同，200～250mm厚的板坯经过5道次或7道次粗轧，每道次变形量必须≥18％，根据成品厚度不同，中间坯厚度不同，但中间坯厚度必须在成品厚度的4倍以上。
经过粗轧后的钢坯随后进行热卷箱卷取，所述热卷箱例如可以为无芯移送热卷箱。在所述热卷箱中实现中间坯头尾互换，以保证钢坯通长的温度均匀；同时去除二次氧化铁皮以保证钢坯板面光洁。
中间坯经热卷箱卷取之后即进行移位开卷，进入精轧区进行精轧，精轧入口温度控制970～1020℃，终轧温度范围为850～900℃，精轧后采用空冷方式冷却。
下面是本发明的5个实施例，表1是本发明的5个实施例的化学成分，表2是热轧工艺控制值，表3是钢卷的力学性能。
表1 实施例的化学成分
实施例 C Si Mn Cr P S Ti
1 0.29 0.2 1.30 0.43 0.012 0.002 0.016
2 0.27 0.19 1.27 0.44 0.012 0.003 0.016
3 0.29 0.22 1.31 0.45 0.013 0.002 0.014
4 0.28 0.22 1.32 0.46 0.011 0.002 0.013
5 0.28 0.21 1.34 0.44 0.012 0.002 0.014
表2 实施例的热轧工艺控制值
实施例 出炉温度/℃ 中间坯厚度/mm 开轧温度/℃ 精轧温度/℃
1 1212 44 1005 882
2 1208 44 1002 885
3 1210 44 997 865
4 1205 44 992 872
5 1210 44 1000 883
表3 实施例的钢卷的力学性能
实施例 屈服强度(ReL)MPa 抗拉强度(Rm)MPa 延伸率(A)％ 冷弯B＝35,α＝180°，d＝a
1 345 637 37.0 合
2 344 623 37.5 合
3 348 634 38.5 合
4 351 636 36.0 合
5 363 639 37.0 合

Claims (8)

  1. 一种高抗挤SEW石油套管用热连轧钢卷，其特征在于：所述的热连轧钢卷为包括下述重量份化学组分的连铸连轧钢卷，
    所述的化学组分为C：0.22～0.32％，Si：0.10～0.30％，Mn：1.10～1.40％，Cr：0.30～0.60％，P：≤0.020％，S：≤0.010％，Ti：0.008～0.019％。，其余为Fe和不可避免的杂质，
    所述连铸连轧钢卷的初始屈服强度为340～360MPa，初始抗拉强度为620～640MPa；所述连铸连轧钢卷调质处理后的屈服强度840MPa～910MPa，抗拉强度940～1030MPa。
  2. 根据权利要求1所述的高抗挤SEW石油套管用热连轧钢卷，其特征在于：所述的化学组分为C：0.24～0.30％，Si：0.10～0.30％，Mn：1.20～1.40％，Cr：0.40～0.50％，P：≤0.018％，S：≤0.005％，Ti：0.010～0.017％，其余为Fe和不可避免的杂质。
  3. 一种用于根据权利要求1或2所述热连轧钢卷的生产方法，其特征在于：所述的生产方法以连铸板坯为初始坯料，在控温加热条件下经过5-7个道次的细化晶粒粗轧构成中间坯，再将中间坯进行至少4个道次的精轧，最后进行冷却卷取来完成所述热连轧钢卷的生产加工工作，
    其中，在各个道次的细化晶粒粗轧过程中，每一个道次钢坯的变形量必须≥18％，经过细化晶粒粗轧后的中间坯的厚度为成品热连轧钢卷厚度的3.8-4.2倍，精轧完成卷取前的冷却为空冷方式冷却。
  4. 根据权利要求3所述的生产方法，其特征在于：在进行各个道次的细化晶粒粗轧时，加热的温度控制在1180～1220℃。
  5. 根据权利要求3所述的生产方法，其特征在于：初始连铸板坯的厚度在200～250㎜之间。
  6. 根据权利要求3所述的生产方法，其特征在于：在进行精轧时，各道次的精轧通过精轧机组一次完成。
  7. 根据权利要求6所述的生产方法，其特征在于：精轧时的入口温度控制在970～1020℃之间，终轧温度范围为850～900℃。
  8. 根据权利要求3所述的生产方法，其特征在于：经过细化晶粒粗轧后的板坯先进入热卷箱进行坯头坯尾互换卷取，然后再开卷进入精轧区进行控温精 轧。
PCT/CN2018/091943 2017-09-11 2018-06-20 高抗挤sew石油套管用热连轧钢卷及其生产方法 WO2019047587A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18854330.0A EP3683326A4 (en) 2017-09-11 2018-06-20 HOT CONTINUOUS ROLLED STEEL COIL FOR HIGH CRUSH RESISTANCE SEW OIL PAN AND RELATED PRODUCTION PROCESS
US16/614,603 US11466333B2 (en) 2017-09-11 2018-06-20 Continuous hot rolled coil for high collapse-resistant sew petroleum casing and manufacturing method thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710812899.0A CN107502822B (zh) 2017-09-11 2017-09-11 高抗挤sew石油套管用热连轧钢卷及其生产方法
CN201710812899.0 2017-09-11

Publications (1)

Publication Number Publication Date
WO2019047587A1 true WO2019047587A1 (zh) 2019-03-14

Family

ID=60695478

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/091943 WO2019047587A1 (zh) 2017-09-11 2018-06-20 高抗挤sew石油套管用热连轧钢卷及其生产方法

Country Status (4)

Country Link
US (1) US11466333B2 (zh)
EP (1) EP3683326A4 (zh)
CN (1) CN107502822B (zh)
WO (1) WO2019047587A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115418546A (zh) * 2022-07-26 2022-12-02 新疆八一钢铁股份有限公司 一种冷成型承插钢管用热轧卷材b265k的生产方法
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107502822B (zh) * 2017-09-11 2019-06-14 攀钢集团攀枝花钢铁研究院有限公司 高抗挤sew石油套管用热连轧钢卷及其生产方法
CN111615563A (zh) * 2018-01-17 2020-09-01 纳米钢公司 合金和在金属零件的成型过程中形成屈服强度分布的方法
CN113118209B (zh) * 2021-04-15 2023-01-17 鞍钢股份有限公司 一种提高x70m管线钢低温dwtt性能的方法
CN113564450B (zh) * 2021-07-29 2022-08-09 唐山瑞丰钢铁（集团）有限公司 非精炼条件下钛微合金化q355b热轧带钢生产方法
CN113817960A (zh) * 2021-08-10 2021-12-21 包头钢铁（集团）有限责任公司 一种n80石油套管用钢及其制备方法
CN115652190B (zh) * 2022-09-20 2023-11-28 包头钢铁（集团）有限责任公司 一种Nb-Ti-Mo成分系L415M-RW热煨弯管用热轧钢带生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740255A (en) * 1986-03-17 1988-04-26 Manton Robert B High strength weldable seamless tube of low alloy steel
JP2001131698A (ja) * 1999-10-28 2001-05-15 Sumitomo Metal Ind Ltd 耐硫化物応力割れ性に優れた鋼管
CN102212751A (zh) * 2011-06-03 2011-10-12 首钢总公司 一种稠油热采井用高强度石油套管用钢及其制造方法
CN106480375A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种高强度电阻焊套管及其制造方法
CN107502822A (zh) * 2017-09-11 2017-12-22 攀钢集团攀枝花钢铁研究院有限公司 高抗挤sew石油套管用热连轧钢卷及其生产方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101967606A (zh) * 2010-11-02 2011-02-09 武汉钢铁(集团)公司 直缝电阻焊石油套管用热轧钢带及其生产方法
CN102605235B (zh) * 2011-12-14 2014-04-02 宝鸡石油钢管有限责任公司 一种高抗挤sew石油套管及其制造方法
CN104561774A (zh) 2013-10-10 2015-04-29 鞍钢股份有限公司 一种p110级直缝焊石油套管及其制造方法
CN103572025B (zh) * 2013-11-19 2015-06-17 攀钢集团西昌钢钒有限公司 一种低成本x52管线钢的生产方法及管线钢

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740255A (en) * 1986-03-17 1988-04-26 Manton Robert B High strength weldable seamless tube of low alloy steel
JP2001131698A (ja) * 1999-10-28 2001-05-15 Sumitomo Metal Ind Ltd 耐硫化物応力割れ性に優れた鋼管
CN102212751A (zh) * 2011-06-03 2011-10-12 首钢总公司 一种稠油热采井用高强度石油套管用钢及其制造方法
CN106480375A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种高强度电阻焊套管及其制造方法
CN107502822A (zh) * 2017-09-11 2017-12-22 攀钢集团攀枝花钢铁研究院有限公司 高抗挤sew石油套管用热连轧钢卷及其生产方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3683326A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys
CN115418546A (zh) * 2022-07-26 2022-12-02 新疆八一钢铁股份有限公司 一种冷成型承插钢管用热轧卷材b265k的生产方法

Also Published As

Publication number Publication date
US20200399728A1 (en) 2020-12-24
US11466333B2 (en) 2022-10-11
EP3683326A4 (en) 2021-06-02
CN107502822A (zh) 2017-12-22
EP3683326A1 (en) 2020-07-22
CN107502822B (zh) 2019-06-14

Similar Documents

Publication Publication Date Title
WO2019047587A1 (zh) 高抗挤sew石油套管用热连轧钢卷及其生产方法
US10287645B2 (en) Method for producing high-strength steel material excellent in sulfide stress cracking resistance
JP4632000B2 (ja) 継目無鋼管の製造方法
US6846371B2 (en) Method for making high-strength high-toughness martensitic stainless steel seamless pipe
TWI432585B (zh) Pipeline heat coil and its manufacturing method
CN107099745B (zh) 高碳当量低温高韧性的x80弯管用管线钢板及其制造方法
US20150083266A1 (en) High-strength thick-walled electric resistance welded steel pipe having excellent low-temperature toughness and method of manufacturing the same
JP4905240B2 (ja) 表面品質、破壊靱性および耐サワー性に優れる熱延鋼板の製造方法
CN102741438B (zh) 气囊用钢管及其制造方法
CN110777296B (zh) 一种超厚规格x52管线钢热轧卷板及其生产方法
CN101514435B (zh) 低温韧性优良且稳定的管线钢及其热轧板卷轧制方法
CN102719743A (zh) 一种石油套管用热轧卷板及其制造方法
WO2018040246A1 (zh) 深海钻探隔水管用x80及以下钢级管线钢及其制备方法
CN111286672B (zh) 一种针状铁素体型x60级抗hic管线钢及其轧制方法
CN109957710B (zh) 一种含v大变形x80m管线钢板及其制造方法
JP5087966B2 (ja) 表面品質および延性亀裂伝播特性に優れる熱延鋼板の製造方法
JP2007196237A (ja) 機械構造部品用継目無鋼管の製造方法
CN105063511B (zh) 中厚板轧机轧制超低碳贝氏体类薄规格钢板及其生产方法
CN104073744B (zh) 厚度≥18.5mm的高韧性X80管线钢板卷及生产方法
CN112063918B (zh) 一种低温高韧性x90钢级热煨弯管用管线钢板及其制造方法
JP4900260B2 (ja) 延性亀裂伝播特性および耐サワー性に優れる熱延鋼板の製造方法
JP2017078196A (ja) 鋼管用厚肉熱延鋼帯の製造方法および角形鋼管の製造方法
CN105238995A (zh) 一种液压成型钢管用热轧酸洗板及其制造方法
CN106636888A (zh) 一种低碳当量高强度x70管线钢热轧卷板及其制造方法
JP2004292922A (ja) 複合二次加工性に優れた高張力鋼管の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18854330

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018854330

Country of ref document: EP

Effective date: 20200414