CN104117824A - Manufacturing method of super high pressure seamless alloy steel pipe - Google Patents

Manufacturing method of super high pressure seamless alloy steel pipe Download PDF

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Publication number
CN104117824A
CN104117824A CN201410349112.8A CN201410349112A CN104117824A CN 104117824 A CN104117824 A CN 104117824A CN 201410349112 A CN201410349112 A CN 201410349112A CN 104117824 A CN104117824 A CN 104117824A
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China
Prior art keywords
steel
rod iron
forging
super
smelting
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CN201410349112.8A
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Chinese (zh)
Inventor
陈菊生
牟能文
莫政宇
刘晓红
于忠斌
王小军
俞科云
林坤
陈坚
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SHANGHAI JIANING NEW TECHNOLOGY RESEARCH INSTITUTE
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SHANGHAI JIANING NEW TECHNOLOGY RESEARCH INSTITUTE
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Priority to CN201410349112.8A priority Critical patent/CN104117824A/en
Publication of CN104117824A publication Critical patent/CN104117824A/en
Pending legal-status Critical Current

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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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • 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
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • 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
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)

Abstract

The invention discloses a manufacturing method of a super high pressure seamless alloy steel pipe. The method mainly comprises steel bar and steel ingot smelting and manufacturing, steel bar forging, steel bar deep hole processing, steel bar thermal treatment and machining as well as steel bar cold drawing and spinning rolling. The method is characterized in that the steel bar and steel ingot smelting and manufacturing process comprises that alloying elements and original ecological steel scrap are selected as raw materials, EF smelting, LF refining, VD refining and vacuum degassing are performed sequentially, and smelting is performed to obtain AISI4333M4 steel. The components include 0.30%-0.38% of C, 0.70%-1.00% of Mn, 0.15%-0.35% of Si, 1.62%-2.00% of Ni, 0.70%-0.90% of Cr, 0.35%-0.45% of Mo, 0%-0.015% of P, 0%-0.005% of S, 0%-0.15% of Cu, 0%-0.005% of Pb, 0%-0.02% of Sn, 0%-0.009% of As, 0%-0.005% of Sb, 0%-0.005% of Bi, 0.02%-0.04% of Al, 0ppm-2ppm of H, 0ppm-2ppm of O and the balance of Fe. The manufacturing method of the super high pressure seamless alloy steel pipe has the advantages of high precision and excellent mechanical properties of the manufactured super high pressure seamless alloy steel pipe.

Description

The manufacture method of the seamless alloy pipe of super-pressure
Technical field
The present invention relates to metallurgical class, be specifically related to the manufacture method of the seamless alloy pipe of a kind of super-pressure.
Background technology
Super-pressure is seamless, and alloy pipe belongs to seamless steel pipe classification, and its material adopts AISI4333M4 steel, the high-pressure polyethylene device of this steel pipe for introducing.Because the seamless alloy pipe of super-pressure is had relatively high expectations for load performance, at present domestic produced AISI4333M4 steel grade cannot reach, and steel pipe length be at least 17 meters and more than, existing machine tool length is shorter, therefore production difficulty is larger, and dependence on import solves always for a long time.
Summary of the invention
The object of the invention is according to above-mentioned the deficiencies in the prior art part, the manufacture method of the seamless alloy pipe of a kind of super-pressure is provided, this manufacture method by controlling harmful elements Pb+Sn+Sb+As+Bi to improve Molten Steel Cleanliness in smelting process, in forging molding process, improve Forging Equipment Speed cooling too early to prevent rod iron, after heat treatment, finally obtain the seamless alloy pipe of super-pressure that mechanical property is outstanding.
The object of the invention realizes and being completed by following technical scheme:
The manufacture method of the seamless alloy pipe of a kind of super-pressure, mainly comprise the smelting manufacture of rod iron steel ingot, the forging of rod iron, the deep hole machining of rod iron, the heat treatment of rod iron, the cold-drawn of rod iron and spinning rolling, the smelting manufacture process that it is characterized in that described rod iron steel ingot is: selecting alloying element and ecosystem steel scrap is raw material, carry out EF melting, LF refining, VD refining and vacuum outgas, smelt to obtain AISI4333M4 steel, its component is: 0.30%≤C≤0.38%, 0.70%≤Mn≤1.00%, 0.15%≤Si≤0.35%, 1.62%≤Ni≤2.00%, 0.70%≤Cr≤0.90%, 0.35%≤Mo≤0.45%, P≤0.015%, S≤0.005%, Cu≤0.15%, Pb≤0.005%, Sn≤0.02%, As≤0.009%, Sb≤0.005%, Bi≤0.005%, 0.02%≤Al≤0.04%, H≤2ppm, O≤20ppm, all the other are Fe.
In described EF fusion process, add double deoxidizer, its component is: aluminium material 4.5～5.5%, ferrosilicon powder 14.5～15%, silicon calcium powder 9～11%, manganese oxide 9～12%, iron oxide 14～16%, carbon dust 9～11%, all the other are bauxite.
In the forging process of described rod iron, adopt quick forging machine to beat being of a size of the steel billet of 400*4270mm to be greater than the speed of 20 beats/min, three fiery forging moldings, forging ratio >=5, expand hydrogen annealing after forging, obtain the rod iron of length >=17000mm.
Advantage of the present invention is that (1) strictly controls the content of harmful elements Pb+Sn+Sb+As+Bi to improve Molten Steel Cleanliness in smelting process; (2) pass through 4000 tons of quick forging machines by the moulding of rod iron rapid forge; (3) overlength L>1700mm deep hole machining, by 2 20 meters of deep hole lathes to and connect lengthening boring bar, unconventional deep hole processing; (4) the seamless alloy pipe precision of the super-pressure of manufacturing is high, mechanical property is excellent.
The specific embodiment
Embodiment: the present embodiment is specifically related to the manufacture method of the seamless alloy pipe of a kind of super-pressure, its manufacture process mainly comprises smelting manufacture, the forging of rod iron, the heat treatment of the deep hole machining of rod iron, rod iron, the cold-drawn of rod iron and the spinning rolling of rod iron steel ingot, and concrete grammar is as follows:
1) the smelting manufacture of rod iron steel ingot
Select high duty alloy element and ecosystem steel scrap as raw material, it cleaned and is dried, that ecosystem steel scrap described herein refers to is pollution-free, free from admixture, without greasy, without the piece material steel scrap of iron rust; Steel stove burner hearth and ladle are carried out to purified treatment, before this steel grade of melting, first refine the close or similar steel grade of 2 stoves, be about to be attached to Cu, Cr, Mo, W remaining on burner hearth and steel ladle and dispose; Afterwards raw material is smelted, the mode of smelting is EF arc melting, the refining of LF ladle refining furnace, the refining of VD vacuum degassing furnace and Fruit storage, wherein:
In EF arc melting process, add double deoxidizer, its component is: aluminium material 4.5-5.5%, ferrosilicon powder 14.5-15%, silicon calcium powder 9-11%, manganese oxide 9-12%, iron oxide 14-16%, carbon dust 9-11%, and all the other are bauxite; In first three time of the heat of oxidation, reduction period and tapping, skim, to remove non-metallic inclusion (seeing the following form 1), improve Molten Steel Cleanliness, reduce the content of S, P as far as possible, and strictly control harmful elements Pb+Sn+Sb+As+Bi≤0.05%, these harmful elements easily make material produce fragility; Enter afterwards the refining of LF ladle refining furnace, then through VD vacuum outgas, make (H)≤2ppm, (O)≤20ppm, smelt to obtain AISI4333M4 steel, its concrete component sees the following form 2.
(table 1) non-metallic inclusion table
(table 2) AISI4333M4 steel chemical composition table
2) forging of rod iron
AISI4333M4 steel forging temperature: 1150 ℃ of initial forging temperatures, 850 ℃ of final forging temperatures.Require to forge thoroughly, (large tonnage pressing machine) rapid shaping is suppressed in must adopting of 10 meters of forging ratio > 5, elongated rod iron L >.Now adopt 4000 tons of quick forging machine > of forging per minute 20 times, (conventional press is per minute to be forged 5--6 time) suppresses rapid forge moulding.As the rod iron of Ф 160*17500mm, forging process is: base is extracted in the first fiery two upsettings two, 400*4270mm the second fire, and 280*8700mm the 3rd fire, forging molding Ф 175*17500mm, expands hydrogen annealing in time after forging.The rapidity of blow that is greater than 20 beats/min by employing in the present embodiment, can prevent the too early cooling forming of large scale rod iron.
3) deep hole machining of rod iron
What the present embodiment will be manufactured is that specification is the seamless alloy pipe of super-pressure of φ 88/ φ 40 * 10300mm and φ 138/ φ 60 * 16500mm, because the endoporus of heavy wall can only adopt deep hole machine tooling, and current existing deep hole lathe the longest be 20 meters, boring bar length L 1, Workpiece length L 2, deep hole machine tooling is the longest must not surpass the rod iron of 9 meters, that is to say that the present embodiment will carry out the steel pipe of two kinds of specifications of deep hole machining, and existing lathe cannot be processed; Therefore, the guide rail of 20 meters of existing deep hole bed pieces is lengthened, and utilize laser calibrated horizontal, lengthen deep hole machine tool boring bar, to complete the processing of ultralong deep hole simultaneously.In order to guarantee deep hole glacing flatness, with overlength guide pin bushing > 800mm, carry out deep hole machining, and constantly with calibrator, measure steel pipe glacing flatness, constantly calibrate.Obtain specification and be respectively two kinds of seamless alloy pipes of super-pressure of φ 88/ φ 40 * 10300mm and φ 138/ φ 60 * 16500mm, and utilize in time vibration ageing device vibration aging on eliminating cutting stress.
4) heat treatment of steel pipe
Elongated steel pipe adopts shaft furnace, and >=20 meters of shaft furnace quenching+temperings, carry out hot school if any bending, and after alignment, tempering in time eliminates stress.
Mechanical property after (table 3) heat treatment
5) cold-drawn of steel pipe and spinning rolling
Steel pipe is carried out to cold-drawn and spinning rolling, further to improve intensity and toughness 10% left and right (as shown in table 4) of steel pipe, in the process of steel pipe machine processing, cold-drawn and spinning rolling, all can produce cutting stress, therefore need to adopt vibration ageing device vibration aging on eliminating cutting stress, guarantee the precision of the seamless alloy pipe of super-pressure.
Finally making specification is two kinds of seamless alloy pipes of super-pressure of φ 88/ φ 40 * 10300mm and φ 138/ φ 60 * 16500mm.
Mechanical property after the rolling of (table 4) cold-drawn spinning
Below for the seamless alloy pipe of super-pressure, adopt the mechanical property contrast of different steel grade components:
1. select the AISI4333M4 steel grade in the present embodiment, simultaneously as shown in table 5 below according to the mechanical property of the seamless alloy pipe of the prepared super-pressure of the manufacture method in the present embodiment:
Alloy pipe mechanical property that (table 5) the present embodiment is seamless
? σ b（N/mm 2） σ 0.2（N/mm 2） δ 4（%） ψ（%）
20℃ 1120-1280 ≥1080 ≥16 ≥50
2. select the standard A ISI4333M4 steel grade of import, its component is: C(0.36%), Mn(0.85%), Si(0.31%), P(≤0.015%), S(≤0.005%), Cr(0.78%), Ni(1.86%), Mo(0.4%), V(0.02%), simultaneously as shown in table 6 below according to the mechanical property of the seamless alloy pipe of the prepared super-pressure of all the other manufacture methods in the present embodiment:
Alloy pipe mechanical property that (table 6) import is seamless
? σ b（N/mm 2） σ 0.2（N/mm 2） δ 4（%） ψ（%）
20℃ 1103 930-1035 15 50
3. select domestic standard A ISI4333M4 steel grade, its component is: C(0.30%-0.38%), Mn(0.70%-1.0%), Si(0.15%-0.35%), P(≤0.015%), S(≤0.005%), Cr(0.70%-0.90%), Ni(1.65%-2.0%), Mo(0.35%-0.45%), V(0.01%), simultaneously as shown in table 7 below according to the mechanical property of the seamless alloy pipe of the prepared super-pressure of all the other manufacture methods in the present embodiment:
(table 7) domestic seamless alloy pipe mechanical property≤10 meter
? σ b（N/mm 2） σ 0.2（N/mm 2） δ 4（%） ψ（%）
20℃ 1000-1100 900-1000 ≥15 ≥50
By 1. above-mentioned-contrast 3., can find to utilize the seamless alloy pipe mechanical property of the prepared super-pressure of AISI4333M4 steel grade in the present embodiment to be better than the mechanical property of standard A ISI4333M4 steel and the domestic standard A ISI4333M4 steel of import.

Claims (3)

1. the manufacture method of the seamless alloy pipe of super-pressure, mainly comprise the smelting manufacture of rod iron steel ingot, the forging of rod iron, the deep hole machining of rod iron, the heat treatment of rod iron, the cold-drawn of rod iron and spinning rolling, the smelting manufacture process that it is characterized in that described rod iron steel ingot is: selecting alloying element and ecosystem steel scrap is raw material, carry out EF melting, LF refining, VD refining and vacuum outgas, smelt to obtain AISI4333M4 steel, its component is: 0.30%≤C≤0.38%, 0.70%≤Mn≤1.00%, 0.15%≤Si≤0.35%, 1.62%≤Ni≤2.00%, 0.70%≤Cr≤0.90%, 0.35%≤Mo≤0.45%, P≤0.015%, S≤0.005%, Cu≤0.15%, Pb≤0.005%, Sn≤0.02%, As≤0.009%, Sb≤0.005%, Bi≤0.005%, 0.02%≤Al≤0.04%, H≤2ppm, O≤20ppm, all the other are Fe.
2. the manufacture method of the seamless alloy pipe of a kind of super-pressure according to claim 1, it is characterized in that adding double deoxidizer in described EF fusion process, its component is: aluminium material 4.5～5.5%, ferrosilicon powder 14.5～15%, silicon calcium powder 9～11%, manganese oxide 9～12%, iron oxide 14～16%, carbon dust 9～11%, all the other are bauxite.
3. the manufacture method of the seamless alloy pipe of a kind of super-pressure according to claim 1, it is characterized in that in the forging process of described rod iron, adopt quick forging machine to beat being of a size of the steel billet of 400*4270mm to be greater than the speed of 20 beats/min, three fiery forging moldings, forging ratio >=5, after forging, expand hydrogen annealing, obtain the rod iron of length >=17000mm.
CN201410349112.8A 2014-07-22 2014-07-22 Manufacturing method of super high pressure seamless alloy steel pipe Pending CN104117824A (en)

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CN102953019A (en) * 2012-09-25 2013-03-06 无锡润丰特种钢管有限公司 Alloy steel seamless steel tube for geological drilling and machining method thereof
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Application publication date: 20141029