CN104313263A - Annealing method of 2Cr12NiMo1W1V blade steel round steel - Google Patents

Annealing method of 2Cr12NiMo1W1V blade steel round steel Download PDF

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Publication number
CN104313263A
CN104313263A CN201410598063.1A CN201410598063A CN104313263A CN 104313263 A CN104313263 A CN 104313263A CN 201410598063 A CN201410598063 A CN 201410598063A CN 104313263 A CN104313263 A CN 104313263A
Authority
CN
China
Prior art keywords
steel
annealing
blade
blade steel
round steel
Prior art date
Application number
CN201410598063.1A
Other languages
Chinese (zh)
Inventor
史普辑
许立伟
卫争艳
Original Assignee
山西太钢不锈钢股份有限公司
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.)
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Publication date
Application filed by 山西太钢不锈钢股份有限公司 filed Critical 山西太钢不锈钢股份有限公司
Priority to CN201410598063.1A priority Critical patent/CN104313263A/en
Publication of CN104313263A publication Critical patent/CN104313263A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing

Abstract

The invention provides an annealing method of 2Cr12NiMo1W1V blade steel round steel, and belongs to the field of forging. The round steel annealing method is characterized by comprising the following steps: heating blade steel to 900 DEG C, performing uniform heat preservation for 4-6 hours, quickly cooling the blade steel to 700 DEG C within 10 minutes, performing heat preservation for 6-8 hours at 700 DEG C, and naturally cooling the blade steel to room temperature after uniform heat preservation. After the 2Cr12NiMo1W1V blade steel round steel provided by the invention is adopted, compared with the common complete annealing or high temperature tempering process, the cracking proportion of the forged piece is minimum, and the cracking rate of the forged piece is smaller than 1%; and in the production process and control process, the cooling speed or furnace loading interval of the forged piece is not particularly required, and thus the production process is very convenient to control.

Description

A kind of 2Cr12NiMo1W1V Blade Steel round steel method for annealing
Technical field
The invention belongs to forging field, a kind of 2Cr12NiMo1W1V Blade Steel round steel method for annealing.Background technology
Steam turbine Blade Steel is on the basis of traditional 2Cr13 Martensite Stainless Steel, by adding the alloying element such as W, V, Nb, Mo, Co, strengthens its high temperature creep property, to adapt to the requirement of vapor temperature that Modern Power Plant improves constantly, pressure.2Cr12NiMo1W1V Blade Steel contains a certain amount of Ni element, and alloy content is higher, cause its supercooled austenite isothermal transformation diagram (C curve) seriously to move to right than conventional 2Cr13, be out of shape, critical cooling velocity slows down, hardening capacity strong, and air cooling can obtain martensitic stucture.And improper according to annealing process, very easily retained austenite body tissue in annealing process of cooling, in long-term stacking process, residual austenite just changes martensite into gradually, and causes ftractureing in this steel.
Summary of the invention
Producing problem of Cracking in ag(e)ing process after annealing to prevent round steel, the invention provides a kind of method for annealing of 2Cr12NiMo1W1V Blade Steel round steel.
Technical scheme of the present invention:
Blade Steel is heated to 900 DEG C of evenly insulation 4-6 hour, then within 10 min, is quickly cooled to 700 DEG C, and at 700 DEG C of insulation 6-8 hour, after insulation evenly, naturally cool to room temperature.
The present invention can effectively prevent stress cracking in the ag(e)ing process produced because of the difference of tissue before annealing.
Adopt the 2Cr12NiMo1W1V Blade Steel round steel after the present invention, cracking ratio is compared with general Full Annealing or high-temperature tempering process, the cracking ratio of forging material is minimum, forging material cracking rate is less than 1%, and to forging material cooling after forged speed and the shove charge timed interval etc. without particular requirement in production process control process, production process controls more for convenience.
Embodiment
During forging 2Cr12NiMo1W1V Blade Steel round steel, after a production batch (about 30 tons) all forging, Blade Steel is heated to 900 DEG C of evenly insulation 4-6 hour, then within 10 min, 700 DEG C are quickly cooled to, and at 700 DEG C of insulation 6-8 hour, after insulation evenly, naturally cool to room temperature.
2Cr12NiMo1W1V Blade Steel round steel chemical composition operative norm is GB/T8732-2004.

Claims (1)

1. a 2Cr12NiMo1W1V Blade Steel round steel method for annealing, it is characterized in that Blade Steel being heated to 900 DEG C of evenly insulation 4-6 hour, then within 10 min, be quickly cooled to 700 DEG C, and at 700 DEG C of insulation 6-8 hour, after insulation evenly, naturally cool to room temperature.
CN201410598063.1A 2014-10-31 2014-10-31 Annealing method of 2Cr12NiMo1W1V blade steel round steel CN104313263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410598063.1A CN104313263A (en) 2014-10-31 2014-10-31 Annealing method of 2Cr12NiMo1W1V blade steel round steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410598063.1A CN104313263A (en) 2014-10-31 2014-10-31 Annealing method of 2Cr12NiMo1W1V blade steel round steel

Publications (1)

Publication Number Publication Date
CN104313263A true CN104313263A (en) 2015-01-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410598063.1A CN104313263A (en) 2014-10-31 2014-10-31 Annealing method of 2Cr12NiMo1W1V blade steel round steel

Country Status (1)

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CN (1) CN104313263A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101525726A (en) * 2009-04-22 2009-09-09 四川江油六合汽轮机材料有限公司 Heat-resisting steel material used as vane or bolt of supercritical steam turbine and preparation method thereof
CN102477518A (en) * 2010-11-24 2012-05-30 宝山钢铁股份有限公司 Steel used for steam turbine blades and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101525726A (en) * 2009-04-22 2009-09-09 四川江油六合汽轮机材料有限公司 Heat-resisting steel material used as vane or bolt of supercritical steam turbine and preparation method thereof
CN102477518A (en) * 2010-11-24 2012-05-30 宝山钢铁股份有限公司 Steel used for steam turbine blades and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蔡正德: "2Cr12NiMo1W1V汽轮机叶片用钢的热处理实践", 《中国化工装备》, no. 1, 31 December 2003 (2003-12-31), pages 30 - 33 *

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Application publication date: 20150128

RJ01 Rejection of invention patent application after publication