KR960015267B1 - Making method of ni-cr-mo-v alloy steel - Google Patents

Making method of ni-cr-mo-v alloy steel Download PDF

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Publication number
KR960015267B1
KR960015267B1 KR1019940003575A KR19940003575A KR960015267B1 KR 960015267 B1 KR960015267 B1 KR 960015267B1 KR 1019940003575 A KR1019940003575 A KR 1019940003575A KR 19940003575 A KR19940003575 A KR 19940003575A KR 960015267 B1 KR960015267 B1 KR 960015267B1
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South Korea
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steel
weight
cooling
heating
chromium
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KR1019940003575A
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Korean (ko)
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KR950025114A (en
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임채홍
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삼성중공업 주식회사
이해규
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    • 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
    • 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
    • C21D1/28—Normalising
    • 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

Abstract

The steel comprises 0.25-0.40 wt.% carbon, 0.40-0.80 wt.% silicon, 0.8-1.60 wt.% manganese, 0.05 wt.% below phosphorus, 0.05 wt.% below sulfur, 1.0-2.0 wt.% nickel, 0.2-1.0 wt.% chromium, 0.10-0.50 wt.% molybdenum, 0.05-0.2 wt.% vanadium. The Ni-Cr-Mo-V alloy steel is produced by the steps of: making a steel comprising the composition, normalizing and annealing the alloy through air-cooling after heat-treating the steel at a temperature of 920 deg.C =F 20 deg.C, quenching the steel through oil-cooling after heating at 880 deg.C =F 20 deg.C, tempering at low temperature through air-cooling after heating 240 deg.C =F 20 deg.C, tempering at high temperature through water-cooling.

Description

니켈-크롬-몰리브덴-바나듐의 성분을 갖는 고내마모성강의 제조방법Manufacturing method of high wear resistant steel having a component of nickel-chromium-molybdenum-vanadium

제 1 도는 본 발명의 강종의 내마모성 비교를 위한 소입능 시험예.1 is a hardening test example for comparing the wear resistance of the steel of the present invention.

본 발명은 시멘트 업계에 사용되는 원석파쇄용 크랏샤(Crusher)부품의 수명연장에 관한 것으로 니켈(Ni), 크롬(Cr), 몰리브덴(Mo), 바나듐(V)의 성분을 갖는 고내마모성강의 제조방법에 관한 것이다.The present invention relates to the life extension of the crusher (crusher) component used in the cement industry, the production of high wear-resistant steel having the components of nickel (Ni), chromium (Cr), molybdenum (Mo), vanadium (V) It is about a method.

종래의 크랏샤 임팩트 햄머는 고망간장(강종 SCMnH11)으로 제작되고 있으나 내마모성이 낮아서 부품의 파손 및 잦은 교체등의 문제점을 가지고 있으므로 가격이 저렴하고 내마모성이 우수한 고내마모강을 본 발명에 의하여 제시한다.The conventional Krassah impact hammer is made of high manganese (steel type SCMnH11), but has a problem of breakage and frequent replacement of parts due to low wear resistance, and thus provides a low wear resistance and high wear resistance steel according to the present invention. .

본 발명에 의한 고내마모강은, 탄소 ; 0.25-0.40중량96%, 규소 ; 0.40-0.80중량%, 망간 ; 0.8-1.60중량%, 인 ; 0.05중량% 이하, 유황 : 0.05중량% 이하, 닉켈 : 1.0-2.0중량96%크롬 ; 0.2-1.0중량96%, 몰리브덴 ; 0.10-0.50중량%, 바나듐 : 0.05-0.2중량%의 화학성분을 가진다.High wear-resistant steel by this invention is carbon; 0.25-0.40 weight 96%, silicon; 0.40-0.80 weight%, manganese; 0.8-1.60 weight%, phosphorus; 0.05 weight% or less, sulfur: 0.05 weight% or less, nickel: 1.0-2.0 weight 96% chromium; 0.2-1.0 weight 96%, molybdenum; 0.10-0.50% by weight, vanadium: 0.05-0.2% by weight of chemical composition.

이 강종의 제조방법은 상기의 성분으로 제강된 강을 노오말라이징 또는 아니링(열처리온도 920℃±20℃로 가열후 공냉>, 퀘앤칭(880℃±20℃로 가열후 유냉), 저은텝퍼링(240t±20t로 가연후 유냉), 고온템퍼링 : 솔트처리(620℃±20℃로 가열후 공냉)의 열처리에 의하여 제조한다.The production method of this steel grade is normalizing or annealing steel made with the above components (air-cooling after heating to 920 ℃ ± 20 ℃), quenching (oil cooling after heating to 880 ℃ ± 20 ℃) It is manufactured by the heat treatment of the furring (burning after cooling to 240t ± 20t) and high temperature tempering: salt treatment (heating after cooling to 620 ℃ ± 20 ℃).

여기서 본 발명의 화학조성을 한정하는 이유를 설명하면 다음과 같다.The reason for limiting the chemical composition of the present invention is as follows.

탄소성분의 증가에 따라 항복점, 인장강도, 경도가 높아지며 0.25% 이상이어야만 필요한 경도 및 내마모성을 나타낼 수 있으며, 또한, 탄소성분이 0.50에서 HRC 65 정도의 고경도를 나다내나 시멘트 크랏샤 부품용으로 사용시 파손할 우려가 있으며, 그리고, 합금원소에 의해서도 강의 경도는 상승하므로 합금성분을 함유시 사용가능한 최고경도는 탄소 0.40% 이므로 탄소 0.25∼0.4%로 정했다.As the carbon content increases, yield point, tensile strength, and hardness increase, and it must be 0.25% or more to show the required hardness and wear resistance.In addition, when the carbon component exhibits high hardness of 0.50 to HRC 65, it is used for cement crusher parts. There is a risk of damage, and the hardness of steel also increases by alloying elements, so the maximum hardness that can be used when the alloying component is contained is 0.40% to 0.4% of carbon.

망간의 함량도 강도를 위해 약간 높혀서 0.8-1.50%로 했으며 연성을 위해서 니켈은 1.0-2.0%로, 강인성을 위해서 크롬 0.2-1.0%, 몰리브덴 0.10-0.5%, 소입성 개선과 결정질 미세화를 위하여 바나듐 0.05-2.0%를 함유시켰다.The content of manganese is also slightly increased for strength to 0.8-1.50%, nickel for 1.0-2.0% for ductility, 0.2-1.0% for chromium, 0.10-0.5% for molybdenum, and vanadium for quenching and crystallization 0.05-2.0%.

이 발명강은 종래의 SCNCrM강에 비해 상기와 같이 닉켈, 크롬, 몰리브덴함량의 조절 및 바나듐의 첨가로 결정립 미세화 및 연화저항의 개선과 또한, 열처리에 의한 가공성 향상 및 마모부위의 고강도, 고인성, 고경도로 인한 내마모성이 우수하게 되어 사용 수명이 연장되어서, 본 발명강종의 제품사용시 크릿샤 부품교체, 보수시간 단축을 기할 수 있어 경제적이다.Compared with the conventional SCNCrM steel, the inventive steel has improved grain refinement and softening resistance by controlling the nickel content, chromium and molybdenum content, and adding vanadium, as well as improved workability by heat treatment, high strength, high toughness, and It is excellent in wear resistance due to high hardness, so that the service life is extended, and it is economical because it is possible to shorten the repair time and replace the crissche parts when using the steel of the present invention.

[실시예]EXAMPLE

본 발명강의 성분범위로 제강하고 열처리한 소재의 기계적 성질을 시험한 결과는 다음 제 1표의 범위에 들어갔으며 내마모특성을 부석하기 위하여 소입능을 시험한 결과를 제 1 도에서 보인바와 같이 충분한 내마모성을 보였다.The results of testing the mechanical properties of the steel and heat-treated material in the component range of the present invention are in the range of the following Table 1, and the results of the test of the quenching ability to embezzle the wear resistance are as shown in FIG. Showed.

제 1 표Table 1

기계적 성질Mechanical properties

Claims (1)

탄소 ; 0.25-0.40중량%, 규소 ; 0.40-0.80중량%, 망간 ; 0.8-1.60중량%, 인;0.05중량% 이하, 유황 ; 0.05중량96%이하, 닉켈 : 1.0-2.0중량%, 크롬 : 0.2-1.0중량%, 몰리브덴 ; 0.10-0.50중량%, 바나듐 ; 0.05-0.20중량%의 성분을 갖는 고내마모성강의 제조방법에 있어서, 상기의 성분을 가지는 강을 제강하고, 이강을 열처리온도 920℃±20℃로 가열후 공냉하는 노오말라이징 또는 아닐링단계, 880℃±20℃로 가열후 유냉하는 퀘앤칭단계, 240℃±20℃로 가열후 공냉하는 저온템퍼링단계, 620℃±20℃를 가열후 수냉하는 고온템퍼링(솔트처리) 단계에 의하여 제조하는 것을 특징으로 하는 고내마모성강의 제조방법.Carbon; 0.25-0.40 weight%, silicon; 0.40-0.80 weight%, manganese; 0.8-1.60 wt%, phosphorus; 0.05 wt% or less, sulfur; 0.05 weight% or less, nickel: 1.0-2.0 weight%, chromium: 0.2-1.0 weight%, molybdenum; 0.10-0.50 weight%, vanadium; In the manufacturing method of high wear-resistant steel having a component of 0.05-0.20% by weight, a normalizing or annealing step of steelmaking the steel having the above components and cooling the steel to a heat treatment temperature of 920 ° C. ± 20 ° C., followed by air cooling, 880 Quenching step of oil cooling after heating to ℃ ± 20 ℃, low temperature tempering step of air cooling after heating to 240 ℃ ± 20 ℃, high temperature tempering (salt treatment) step of water cooling after heating 620 ℃ ± 20 Method for producing high wear-resistant steel
KR1019940003575A 1994-02-26 1994-02-26 Making method of ni-cr-mo-v alloy steel KR960015267B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266212A (en) * 2013-05-31 2013-08-28 中原特钢股份有限公司 Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100445890B1 (en) * 2002-01-08 2004-08-25 주식회사 세아베스틸 A wear resisting steel and a method thereof
CN112322867B (en) * 2020-10-26 2023-03-21 武汉重工铸锻有限责任公司 Heat treatment process for improving comprehensive mechanical properties of Cr-Ni-Mo large-scale forging for nuclear power

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266212A (en) * 2013-05-31 2013-08-28 中原特钢股份有限公司 Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging
CN103266212B (en) * 2013-05-31 2014-08-06 中原特钢股份有限公司 Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging

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