CN109468447A - 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method - Google Patents

12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method Download PDF

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Publication number
CN109468447A
CN109468447A CN201811268019.9A CN201811268019A CN109468447A CN 109468447 A CN109468447 A CN 109468447A CN 201811268019 A CN201811268019 A CN 201811268019A CN 109468447 A CN109468447 A CN 109468447A
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CN
China
Prior art keywords
forging
steel ingot
low
high strength
12crni5mov
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CN201811268019.9A
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Chinese (zh)
Inventor
曹虹
刘国平
于海娟
来坤领
马晓兵
罗波
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Wuhan Heavy Industry Casting and Forging Co Ltd
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Wuhan Heavy Industry Casting and Forging Co Ltd
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Priority to CN201811268019.9A priority Critical patent/CN109468447A/en
Publication of CN109468447A publication Critical patent/CN109468447A/en
Pending legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C22C38/18—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
    • C22C38/18—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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  • 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)
  • Forging (AREA)

Abstract

The present invention relates to 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing methods, it is red to send hot steel ingot in 700~750 DEG C of heating and thermal insulations, it is kept the temperature to 1200~1270 DEG C, the upper flat lower V-type anvil for being placed in forging tooling is forged, mode is pushed using forging light, again, gently, improve the stress state of forging, reduces forging face crack.Modifier treatment is carried out after forging pushing processing, modifier treatment saturating, tempering mode using double quenching water coolings obtains 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.The present invention is in the chemical component of steel ingot, using mild steel ingot, and controls Mn, Ni alloy content in the reasonable scope；It makes full use of forging, modifier treatment to sorbitic effect is finally organized, obtains tiny Soxhlet body tissue, it is ensured that obdurability reaches most preferably, and steel alloy forging shaft is able to satisfy the manufacture needs of ship and other structures superhigh intensity components forging.

Description

12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method
Technical field
The invention belongs to Low-carbon High Strength forging shaft production technical fields, relate generally to a kind of 12CrNi5MoV low carbon high-strength Spend steel alloy forging shaft manufacturing method.
Background technique
12CrNi5MoV is the material that a kind of carbon content is low and yield strength is high, and comprehensive mechanical property is good, especially welds It connects performance and low-temperature flexibility is very excellent, be widely used in ship and other structures superhigh intensity important feature part and components forging The manufacture of base.Forging stock performance is represented by the performance of sample, after the conditioned processing of sample for representing a collection of forging stock when performance qualification, This batch of forging stock just can be used for manufacturing.
Former manufacturing method is the mechanical property of forging stock to be represented by the mechanical property of sample, therefore cause quenched after being applied to process Forging shaft manufacture is less.Need thus it is a kind of be capable of processing it is quenched after to reach the manufacturing method of related performance indicators forging shaft especially heavy It wants.
Summary of the invention
The purpose of the present invention is be directed to above-mentioned status, it is desirable to provide quenched forging shaft has tiny after a kind of forged processing Soxhlet body tissue, obdurability reaches the 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method of best fit.
The object of the invention implementation is 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method,
Steel ingot chemical component wt out is just smelted, %, heat analysis requires as follows: C 0.10~0.13%, Si 0.23~ 0.37%, Mn 0.32~0.58%, Cr 0.92~1.19%, Ni 4.52~4.98%, Mo 0.42~0.58%, V 0.04 ~0.08%；
Steel ingot is processed according to the following steps:
1) red to send hot steel ingot first in 700~750 DEG C of 1~4h of heating and thermal insulation, then 1200~1270 DEG C are warming up to, heat preservation 3~ 19h；
2) the upper flat lower V-type anvil that the steel ingot through step 1) heating, heat preservation is placed in forging tooling is forged, forging uses Gently, forging again, gently pushes mode: pressing down 30~60mm from surface when steel ingot cogging, centre is pressed downward 90~200mm, eventually 30~60mm is pressed downward when forging；
100 °~120 ° of angle among the upper flat lower V-type anvil；
4) forging pushed being forged through step 2) and carrying out modifier treatment, modifier treatment is using double quenching modes；For the first time Quenching is: being heated to 900~960 DEG C, keeps the temperature 2~6 hours, it is saturating to take out water cooling；Second quenches: be heated to 900~960 DEG C, It is saturating to take out water cooling for heat preservation 2~6 hours；It is tempered to 600~650 DEG C again,；Heat preservation 4~12 hours；It is high to obtain 12CrNi5MoV low-carbon Strength alloys steel shaft forging.
The present invention is in the chemical component of steel ingot, using mild steel ingot, and controls Mn, Ni alloy content in zone of reasonableness It is interior；In production technology, makes full use of forging, modifier treatment to sorbitic effect is finally organized, obtain tiny sorbite Tissue, it is ensured that obdurability reaches best fit.
Main performance through 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft produced by the present invention are as follows: Rel >=785~ 925MPa, A >=16%, Z >=45%, AKV2 (- 20 DEG C) >=80J are able to satisfy ship and other structures superhigh intensity components The manufacture of forging needs.
Detailed description of the invention
Fig. 1 is the forging tool structure schematic diagram that the present invention uses.
Specific embodiment
The present invention has just smelted the chemical component % of steel ingot out, wt, and heat analysis is as follows: C 0.10~0.13%, Si 0.23~0.37%, Mn 0.32~0.58%, Cr 0.92~1.19%, Ni 4.52~4.98%, Mo 0.42~0.58%, V 0.04~0.08%.
The present invention send steel ingot 700~750 DEG C of heating and thermal insulations for red, then is warming up to 1200~1270 DEG C of heat preservations, is placed in forging The upper flat lower V-type anvil of tooling is forged, and is pushed mode using forging light, again, gently, can be improved the stress state of forging, subtract Few forging face crack.It forges and carries out modifier treatment after pushing, modifier treatment saturating, tempering mode using double quenching water coolings obtains Tiny Soxhlet body tissue, it is ensured that obdurability reaches most preferably, obtains 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
The main performance of 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft produced by the present invention, tensile property index is such as Under: Rel >=785~925MPa, A >=16%, Z >=45%；Impact flexibility: the AKV2 of each sample must not be low under -20 DEG C of low temperature In 80J, it is able to satisfy the manufacture needs of ship and other structures superhigh intensity components forging.
Specific embodiment is used below, and the present invention is described in detail with reference to the attached drawings.
Embodiment 1:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.10%, Si0.37%, Mn0.32%, Cr 1.16%, Ni 4.95%, Mo 0.55%, V0.04%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first in 700 DEG C of heating and thermal insulation 1h, then 1200 DEG C of heat preservation 3h again；
2) steel ingot 2 through step 1) heating, heat preservation upper flat the 1 of forging tooling, 3 swage block of lower V (see Fig. 1) is placed in carry out Forging pushes mode using light, again, light forging, from surface presses down 30mm, centre is pressed downward 90mm when steel ingot cogging, eventually 30mm is pushed when forging；
100 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 900 DEG C, keeps the temperature 2 hours, it is saturating to take out water cooling；Second of Quench heating keeps the temperature 2 hours to 900 DEG C, takes out Water cooling is saturating；It is tempered 600 DEG C again, keeps the temperature 4 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
Embodiment 2:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.10%, Si0.25%, Mn0.58%, Cr 0.92%, Ni 4.98%, Mo 0.56%, V0.04%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first in 710 DEG C of heating and thermal insulation 1.5h, it is then warming up to 1220 DEG C of heat preservation 5h again；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, using it is light, Weight, light forging push mode, and from surface presses down 30mm, centre is pressed downward 120mm when steel ingot cogging, when finish-forging is pushed 30mm；
120 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 910 DEG C, keeps the temperature 3 hours, it is saturating to take out water cooling；Second of Quench heating took out to 910 DEG C, heat preservation 3 hours Water cooling is saturating；It is tempered 620 DEG C again；Heat preservation 6 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
Embodiment 3:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.13%, Si0.37%, Mn0.55%, Cr 1.19%, Ni 4.87%, Mo 0.42%, V0.08%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first 720 DEG C of heating and thermal insulation 2.5h, it is then warming up to 1230 DEG C of heat preservation 7h again；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, using it is light, Weight, light forging push mode, and from surface presses down 50mm, centre is pressed downward 150mm when steel ingot cogging, when finish-forging is pushed 50mm；
110 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 920 DEG C, keeps the temperature 4.5 hours, it is saturating to take out water cooling；Second of Quench heating to 920 DEG C, heat preservation 4.5 hours, It is saturating to take out water cooling；It is tempered 630 DEG C again；Heat preservation 9 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
Embodiment 4:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.11%, Si0.32%, Mn0.51%, Cr0.97%, Ni 4.78%, Mo 0.48%, V0.05%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first in 730 DEG C of heating and thermal insulation 3h, it is then warming up to 1250 DEG C of heat preservation 9.5h again；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, using it is light, Weight, light forging push mode, and from surface presses down 50mm, centre is pressed downward 150mm when steel ingot cogging, when finish-forging is pushed 50mm；
110 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 930 DEG C, keeps the temperature 4 hours, it is saturating to take out water cooling；Second of Quench heating took out to 930 DEG C, heat preservation 4 hours Water cooling is saturating；It is tempered 620 DEG C again；Heat preservation 8 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
Embodiment 5:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.12%, Si0.23%, Mn0.38%, Cr1.05%, Ni 4.61%, Mo 0.44%, V0.04%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first in 740 DEG C of heating and thermal insulation 3.5h, it is then warming up to 1260 DEG C of heat preservation 15h again；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, using it is light, Weight, light forging push mode, and from surface presses down 60mm, centre is pressed downward 180mm when steel ingot cogging, when finish-forging is pushed 60mm；
110 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 960 DEG C, keeps the temperature 5.5 hours, it is saturating to take out water cooling；Second of Quench heating to 960 DEG C, heat preservation 5.5 hours, It is saturating to take out water cooling；It is tempered 650 DEG C again；Heat preservation 11 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
Embodiment 6:
Just smelting the chemical component % of steel ingot out, wt, heat analysis is as follows: C 0.13%, Si0.23%, Mn0.36%, Cr0.96%, Ni 4.52%, Mo 0.58%, V0.07%.
Steel ingot is processed according to the following steps:
1) red to send steel ingot first in 750 DEG C of heating and thermal insulation 4h, it is then warming up to 1270 DEG C of heat preservation 19h again；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, using it is light, Weight, light forging push mode, and from surface presses down 60mm, centre is pressed downward 200mm when steel ingot cogging, when finish-forging is pushed 60mm；
120 ° of angle among the upper flat lower V-type anvil.
4) forging pushed through step 2) forging is subjected to processing modifier treatment, modifier treatment is using double quenchings；For the first time Quenching is: being heated to 950 DEG C, keeps the temperature 6 hours, it is saturating to take out water cooling；Second of Quench heating took out to 950 DEG C, heat preservation 6 hours Water cooling is saturating；It is tempered 630 DEG C again；Heat preservation 12 hours；Obtain 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft.
The applicant to 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft GB/T228.1 obtained by each embodiment, GB/T229 has made performance measurement, and measurement result see the table below.
As seen from the table, the main performance through 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft produced by the present invention Are as follows: Rel >=785~925MPa, A >=16%, Z >=45%, AKV2 (- 20 DEG C) >=80J are able to satisfy ship and other structures are used and surpassed The manufacture of high-intensitive components forging needs.

Claims (1)

1.12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method, it is characterised in that: just smelt steel ingot chemistry out Ingredient wt, %, heat analysis requires as follows: C 0.10~0.13%, Si 0.23~0.37%, Mn 0.32~0.58%, Cr 0.92~1.19%, Ni 4.52~4.98%, Mo 0.42~0.58%, V 0.04~0.08%；
Steel ingot is processed according to the following steps:
1) red to send hot steel ingot first in 700~750 DEG C of 1~4h of heating and thermal insulation, then 1200~1270 DEG C are warming up to, keep the temperature 3~19h；
2) will be heated through step 1), the steel ingot of heat preservation be placed in the upper flat lower V-type anvil of forging tooling and forge, forging using it is light, Weight, light forging push mode: pressing down 30~60mm from surface when steel ingot cogging, centre is pressed downward 90~200mm, when finish-forging It is pressed downward 30~60mm；
100 °~120 ° of angle among the upper flat lower V-type anvil；
3) forging pushed being forged through step 2) and carrying out modifier treatment, modifier treatment is using double quenching modes；It quenches for the first time It is: is heated to 900~960 DEG C, keep the temperature 2~6 hours, it is saturating takes out water cooling；Second of quenching: 900~960 DEG C, heat preservation 2 are heated to ~6 hours, it is saturating to take out water cooling；It is tempered to 600~650 DEG C again；Heat preservation 4~12 hours；12CrNi5MoV Low-carbon High Strength is obtained to close Golden steel shaft forging.
CN201811268019.9A 2018-10-29 2018-10-29 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method Pending CN109468447A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201811268019.9A CN109468447A (en) 2018-10-29 2018-10-29 12CrNi5MoV Low-carbon High Strength steel alloy forging shaft manufacturing method

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103820705A (en) * 2012-11-19 2014-05-28 上海重型机器厂有限公司 Performance heat treatment method for SA508-3 large forging for nuclear power vessel
CN105925894A (en) * 2016-06-23 2016-09-07 江阴兴澄特种钢铁有限公司 Super-thick high-strength lamellar-tearing-resistant Q500D-Z35 hydroelectric generating set steel plate and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103820705A (en) * 2012-11-19 2014-05-28 上海重型机器厂有限公司 Performance heat treatment method for SA508-3 large forging for nuclear power vessel
CN105925894A (en) * 2016-06-23 2016-09-07 江阴兴澄特种钢铁有限公司 Super-thick high-strength lamellar-tearing-resistant Q500D-Z35 hydroelectric generating set steel plate and manufacturing method thereof

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
东北重型机械学院等编: "《大锻件热处理》", 31 October 1974, 北京：机械工业出版社 *
夏期成编: "《钢件淬火变形的分析及控制方法》", 30 November 1984, 太原：山西人民出版社 *
姚智颖等: "12CrNi5MoV锻钢的回火脆特性研究", 《材料开发与应用》 *
技工学校机械类通用教材编审委员会编: "《技工学校机械类通用教材 锻工工艺学（第二版）》", 30 June 1987, 北京：机械工业出版社 *
牛继承等: "超壁厚12CrNi5MoV钢锻件组织与力学性能研究", 《热加工工艺》 *

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