KR100256364B1 - The manufacturing method for wear resistance material and same product - Google Patents

The manufacturing method for wear resistance material and same product Download PDF

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KR100256364B1
KR100256364B1 KR1019950041923A KR19950041923A KR100256364B1 KR 100256364 B1 KR100256364 B1 KR 100256364B1 KR 1019950041923 A KR1019950041923 A KR 1019950041923A KR 19950041923 A KR19950041923 A KR 19950041923A KR 100256364 B1 KR100256364 B1 KR 100256364B1
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molten steel
manufacturing
mesophase pitch
zrb
zrb2
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KR1019950041923A
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KR970027337A (en
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오세민
김제영
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이구택
포항종합제철주식회사
신현준
재단법인포항산업과학연구원
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
    • C04B35/58064—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides
    • C04B35/58078—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides based on zirconium or hafnium borides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/14—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Products (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

PURPOSE: A material and a method for manufacturing the material is provided, which not only solves difficult sintering properties of ZrB2 itself but also has superior erosion resistance against molten metal and molten steel by composing raw materials which is corrosion resistant against the molten steel as a mixture of ZrB2 and mesophase pitch, and sintering the mixture. CONSTITUTION: The corrosion resisting material against molten steel comprises 85 to 98 wt.% of ZrB2 having a purity of 95% or more and an average particle size of 10 microns or less; and 2 to 15 wt.% of mesophase pitch having a softening temperature of 280 deg.C or more and a carbonization yield of 70% or more at a temperature of 1000 deg.C. In a method for manufacturing a corrosion resisting material against molten steel by mixing, forming and firing the raw materials, the method for manufacturing the corrosion resisting material against molten steel comprises the processes of mixing and forming 85 to 98 wt.% of ZrB2 having a purity of 95% or more and an average particle size of 10 microns or less, and 2 to 15 wt.% of mesophase pitch having a softening temperature of 280 deg.C or more and a carbonization yield of 70% or more at a temperature of 1000 deg.C; and firing the formed material at a temperature ranging from 1700 to 2100 deg.C under inert atmosphere for 30 minutes to 3 hours.

Description

용강(溶鋼) 내식성(耐蝕性)소재 및 그 제조방법Molten steel corrosion resistant material and manufacturing method

본 발명은, 용융금속, 특히 용강에 대한 부식, 침식, 및 마모에 강하여, 용강 등 용융금속과 접촉하여 사용하는 열전대 보호관, 롤러, 노즐 등의 부재로서 적용할 수 있는 용강 내식성 소재 및 그 제조방법에 관한 것으로, 보다 상세하게는, 지르코니움 다이보라이드(ZrB2)와 메조페이즈 핏치(Mesophase Pitch)의 혼합물을 원료로 하여 소성함으로써 제조되는 용강 내식성 및 그 제조방법에 관한 것이다.The present invention is resistant to corrosion, erosion, and abrasion of molten metal, particularly molten steel, and can be applied as a member of a thermocouple protective tube, roller, nozzle, etc. used in contact with molten metal such as molten steel, and a manufacturing method thereof. In more detail, the present invention relates to molten steel corrosion resistance produced by firing a mixture of zirconium diboride (ZrB 2 ) and mesophase pitch as a raw material, and a method of manufacturing the same.

용융금속 및 용강과 접촉해서 사용하는 용강 내식성 소재로서, 종래에는 주로 알루미나, 마그네시아, 지르코니아 등의 고융점 산화물이 사용되어 왔다. 이러한 산화물계 세라믹스로 제조된 소재는 내산화성에 있어서는 일반적으로 우수하지만, 고온강도나 마모특성 등 기계적 특성이 좋지 않고 내식성도 부족한 단점이 있다.As a molten steel corrosion resistant material used in contact with molten metal and molten steel, a high melting point oxide such as alumina, magnesia, zirconia and the like has been conventionally used. Materials made of such oxide-based ceramics are generally excellent in oxidation resistance, but have disadvantages such as poor mechanical properties such as high temperature strength and abrasion properties and lack of corrosion resistance.

이러한 문제를 해결하기 위하여 일본 특개소 60-21889호, 60-46987호의 방법이 제안되었다. 이 방법은 용융금속과 용강에 대하여 우수한 내식성을 가진 ZrB2질 세라믹스를 적용한 방법이나, 이 방법에서는 ZrB2자체가 소결성이 나빠 실용화하기 어려운 단점이 있다.In order to solve this problem, methods of Japanese Patent Laid-Open Nos. 60-21889 and 60-46987 have been proposed. This method is a method of applying ZrB 2 ceramics having excellent corrosion resistance to molten metal and molten steel, but this method has a disadvantage that ZrB 2 itself is poor in sintering properties and difficult to be used.

상기 일본특개소 60-21889호 및 60-46987호의 방법의 단점을 해결하기 위하여 MoSi2등의 규화물, SiC, B4C등의 탄화물 및 이들의 조합시킨 소결소재를 첨가하는 미국특허 US 3, 705, 112호의 방법, MoSi2, Sic 및 B4C의 혼합물을 첨가한(미국특허 US 3, 325,300호)의 방법, SiC와 B4C를 첨가한(일본특개소 61-21980호)의 방법 및 SiC와 BN을 첨가한(일본 특개소 61-21979호의 방법)등이 제시되었다.In order to solve the shortcomings of the methods of Japanese Patent Application Laid-Open Nos. 60-21889 and 60-46987, US Pat. No. 3,705, which adds a silicide such as MoSi 2 , a carbide such as SiC, B 4 C, and a combination of sintered materials thereof. , The method of No. 112, the method of adding a mixture of MoSi 2 , Sic and B 4 C (US Pat. No. 3,325,300), the method of adding SiC and B 4 C (Japanese Patent Laid-Open No. 61-21980), and The addition of SiC and BN (the method of Unexamined-Japanese-Patent No. 61-21979) etc. was proposed.

상기와 같은 소결소제를 첨가함으로써 ZrB2자체의 소결성이 많이 개선되고, 특히 MoSi2는 SiO2피막을 생성하여 내산화성을 향상시키는 효과가 있으나, MoSi2자체가 용융금속에 침식되기 쉽고, ZrB2소결체의 용융금속에 대한 내식성을 저하시키는 문제가 있다. 또 SiC, B4C 등도 용융금속에 대한 내식성이 그다지 좋지 않고 특히 용강에서 매우 심하게 침식되는 문제가 있다.By adding the sintering agent as described above, the sinterability of ZrB 2 itself is much improved, and in particular, MoSi 2 has an effect of improving the oxidation resistance by forming a SiO 2 film, but MoSi 2 itself is easily eroded by molten metal, and ZrB 2 There is a problem of lowering the corrosion resistance to the molten metal of the sintered body. In addition, SiC, B 4 C and the like also have a problem that corrosion resistance to molten metal is not very good, especially in molten steel is very eroded.

이에 본 발명자는 상기한 문제점을 해결하여, ZrB2계 세라믹스에 있어서 소결성을 향상시키면서도 용융금속에 대한 내식성이 우수한 소재를 제조하기 위하여 연구와 실험을 행하고, 그 결과에 근거하여 본 발명을 제안하게 된 것이다.Accordingly, the present inventors have solved the above problems, and conduct research and experiment to produce a material having excellent corrosion resistance to molten metal while improving the sintering property in ZrB 2- based ceramics, and proposed the present invention based on the results. will be.

본 발명은 용강내식성 소재의 원료를 ZrB2와 메조페이즈핏치의 혼합물로 조성하고 이를 소성하므로서, ZrB2자체의 난소결성을 해소하고 동시에 용융금속 및 용강에 대한 내침식성이 우수한 소재 및 이를 제조하는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention is to prepare a raw material of the corrosion resistant material of the molten steel in a mixture of ZrB 2 and mesophase pitch and fire it, thereby eliminating the sintering resistance of ZrB 2 itself and at the same time excellent in corrosion resistance to molten metal and molten steel and a method of manufacturing the same It is intended to provide a purpose.

이하, 본 발명에 대하여 상세히 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

본 발명은 ZrB2: 85-98중량％ 및 메조페이즈 핏치:2-15중량％로 조성되는 용강 내식성 소재에 관한 것이다.The present invention relates to a molten steel corrosion resistant material composed of ZrB 2 : 85-98 wt% and mesophase pitch: 2-15 wt%.

또한 본 발명은 원료를 혼합, 성형 및 소성하여 용강 내식성 소재를 제조하는 방법에 있어서, ZrB2:85-98중량％ 과 메조페이즈 핏치:2-15중량％를 혼합하여 성형한후, 불활성분위기 하에서 1700-2100℃의 온도범위를 30분-3시간동안 소성하는 것을 포함하여 이루어지는 용강 내식성 소재의 제조방법에 관한 것이다.In addition, the present invention is a method for producing a molten steel corrosion-resistant material by mixing, molding and firing the raw material, ZrB 2 : 85-98% by weight and mesophase pitch: 2-15% by weight after molding and molding under an inert atmosphere It relates to a method for producing a molten steel corrosion-resistant material comprising firing a temperature range of 1700-2100 ℃ for 30 minutes-3 hours.

이하, 본 발명에 대하여 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.

상기한 목적을 달성하기 위하여 본 발명에서는 우선 원료를 ZrB2:85-98중량％ (이하, '％'라 한다) 및 메조페이스 핏치:2-15％로 조성되도록 함이 바람직한데, 그 이유는 다음과 같다.In order to achieve the above object, in the present invention, first, the raw material is preferably composed of ZrB 2 : 85-98% by weight (hereinafter referred to as '%') and mesoface pitch: 2-15%. As follows.

ZrB2는 본 발명의 용강 내식성 재료의 주성분으로서, 그 하량이 85％ 이하일 경우에는 내식성이 저하되는 문제점이 있으며, 98％이상일 경우에는 소결성이 나빠지는 문제점이 있으므로, 그 함량은 85-98％ 범위로 제한함이 바람직하다.ZrB 2 is the main component of the molten steel corrosion resistant material of the present invention, when the load is 85% or less, there is a problem that the corrosion resistance is lowered, when 98% or more, there is a problem that the sinterability is worsened, the content is 85-98% range Limited to.

이러한 ZrB2순도 95％이상 입도는 평균 10㎛이하 인 것을 사용함이 보다 바람직하다. 메조페이스 핏치는 온도상승에 따라 응용액체 핏치상을 거쳐 고체 탄소상으로 변화한다. 따라서 ZrB2분말과 혼합된 메조페이스 핏치는 용융 및 고화과정을 거치면서 ZrB2분말간의 결합제로 작용함으로써 상기 혼합물의 소결성을 향상시키는 역할을 하는 성분으로서, 그 함량이 2％이하일 경우에는 결합제로서의 역할을 충분히 행하지 못하고 15％이상일 경우에는 재료의 강도와 내식성을 저하시킬 우려가 있으므로 그 함량은 2-15％범위로 제한함이 바람직하다.More preferably, the ZrB 2 purity is 95% or more and the average particle size is 10 µm or less. The mesophase pitch changes to a solid carbon phase via the applied liquid pitch phase as the temperature rises. Thus, ZrB 2 powder mixed with mesophase pitch is a component which serves to improve the sintering property of the mixture by mounting while acting as a binder between the ZrB 2 powder, the melting and solidification process, if the content is 2% or less, serves as a binder If the content is not more than 15%, the strength and the corrosion resistance of the material may be lowered. Therefore, the content is preferably limited to the range of 2-15%.

메조페이스 핏치는 석유계 중질유(重質油)나 석탄계 타르르부터 제조되거나 또는 기타 유기물로부터 합성된 것 모두 사용이 가능하나, 연화점이 280℃ 이상이고 1000℃까지 탄화하였을 때 수율이 70중량％ 이상인 것이 보다 바람직하다. 연화점이 280℃이하인 경우에는 미세한 분말로 분쇄하기가 어려우며, 탄화수율이 70중량％ 이하인 경우는 소결 후 소결체 내부에 기공이 많이 생겨서 기계적 강도와 내침식성이 저하될 우려가 있다.Mesophase pitches can be used either from petroleum heavy oil or coal tar or synthesized from other organic materials, but have a softening point of 280 ° C or higher and a yield of 70% by weight or higher when carbonized to 1000 ° C. It is more preferable. When the softening point is 280 ° C. or less, it is difficult to pulverize into a fine powder. When the carbonization yield is 70 wt% or less, many pores are generated in the sintered body after sintering, which may lower mechanical strength and corrosion resistance.

한편 본 발명에서는 상기와 같은 함량을 갖도록 원료를 혼합하고 성형한 후, 소성하여 용강내식성 재료를 제조하게 되는데, 소성은 불활성 분위기 하에서 1700∼2100℃의 온도범위로 30분-3시간동안 행함이 바람직하며, 그 이유는 다음과 같다.Meanwhile, in the present invention, the raw materials are mixed and molded to have the same content as described above, and then fired to prepare a molten steel corrosion resistant material. The firing is preferably performed for 30 minutes to 3 hours in a temperature range of 1700 to 2100 ° C. under inert atmosphere. , The reason for this is as follows.

원료의 혼합은 건식과 습식 두가지 다 가능하나, 통상 볼밀(Ball Mill)로 혼합하여, 필요에 따라서는 열경화성 수지를 첨가할 수 있다. 성형은 통상의 금형 프레스, 냉간 정수압 프레스(CIP), 니장 주입법(Slip Casting)등을 적용할 수 있다.The mixing of the raw materials can be both dry and wet, but it is usually mixed in a ball mill (therm), a thermosetting resin can be added if necessary. Molding can be applied to a conventional mold press, cold hydrostatic press (CIP), needle casting method (Slip Casting) and the like.

소성방법은 진공이나 불활성 분위기하에서 상압소결하거나, 핫프레스(Hot press)나 열간 정수압 프레스(HIP)등의 가압소결도 가능하다.The firing method may be atmospheric pressure sintered under vacuum or inert atmosphere, or pressure sintering such as hot press or hot hydrostatic press (HIP).

소성온도는 1700-2100℃의 범위가 바람직한데, 1700℃이하에서 소성한 경우에는 약 1450-1650℃의 용강과 접촉하였을 때 수축 등 변형이 일어나거나 균열이 발생할 수 있는 문제점이 있으며, 2100℃이상일 경우에는 메조페이즈 핏치의 수율저하에 따른 재료의 기공율 증가 및 강도저하등의 문제점이 있기 때문이다.The firing temperature is preferably in the range of 1700-2100 ° C. When firing at 1700 ° C. or below, there is a problem that deformation or cracking may occur when contacted with molten steel at about 1450-1650 ° C., and at least 2100 ° C. In this case, there is a problem such as an increase in porosity of the material and a decrease in strength due to a decrease in yield of mesophase pitch.

소성시간은 소성온도에서 30분-5시간 충분하며 소성온도가 시편의 형상 및 크기에 따라 조절할 수 있다.The firing time is sufficient for 30 minutes-5 hours at the firing temperature and the firing temperature can be adjusted according to the shape and size of the specimen.

이하, 본 발명을 실시예를 통하여 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

[실시예]EXAMPLE

습도가 98％이며 입도가 5-10㎛범위인 ZrB2분말과 연화점이 310℃이고 입도가 40㎛이하인 메조페이즈 핏치 분말이 하기표 1과 같이 혼합된 혼합분말을, 레졸형 페놀수지가 3중량％ 용해된 아세톤 중에서 SiC불을 이용하여 48시간 혼합하였다. 혼합후 슬러리를 100℃에서 24시간 건조한 후 100메쉬 이하의 크기로 건식 분쇄하여 냉간 정수압 2000kg/cm2에서 성형하였다. 상기 성형체를 불활성 분위기 하에서 하기 표 1과 같이 1200-2100℃에서 30분-3시간 소성하였다. 소성후 시편의 크기는 직경 18-23mm, 길이는 약 90mm이었다.ZrB 2 powder with a humidity of 98% and a particle size in the range of 5-10 μm and a mesophase pitch powder having a softening point of 310 ° C. and a particle size of 40 μm or less are mixed as shown in Table 1 below, and 3 weights of resol type phenolic resin is used. It was mixed for 48 hours using SiC fire in acetone dissolved in%. After mixing, the slurry was dried at 100 ° C. for 24 hours and then dry pulverized to a size of 100 mesh or less, and then molded at a cold hydrostatic pressure of 2000 kg / cm 2 . The molded body was calcined at 1200-2100 ° C. for 30 minutes-3 hours in an inert atmosphere as shown in Table 1 below. After firing, the specimens had a diameter of 18-23 mm and a length of about 90 mm.

상기와 가이 제조된 시편을 대기 유도 용해로를 이용하여 1600℃용강 중에서 침적시켜 1시간 동안 유지한 후 용손(溶損)속도를 측정하고, 그 결과를 하기 표 1에 나타내었다.The specimens prepared above and Gai were deposited in an molten steel at 1600 ° C. using an air induction melting furnace, and then maintained for 1 hour, and then a melting rate was measured. The results are shown in Table 1 below.

[표 1]TABLE 1

상기 표 1에서 알 수 있는 바와 같이, ZrB2에 적정량의 메조페이즈 핏치가 첨가된 혼합물을 적절한 온도에서 소성한 발명예(1)-(5)의 경우 용강에 대한 내침식성이 우수한 소재를 제조할 수 있음을 알 수 있다.As can be seen in Table 1, in the case of Inventive Examples (1)-(5) in which a mixture in which an appropriate amount of mesophase pitch was added to ZrB 2 was calcined at an appropriate temperature, a material having excellent corrosion resistance to molten steel may be prepared. It can be seen that.

반면에, 비교예(1)과 같이 메조페이즈 핏치를 첨가하지 않은 경우나 비교예(2)와 같이 지나치게 많이 첨가한 경우에는 용강에 대한 내침식성이 저하되며, 비교예(3)과 같이 적절한 양의 메조페이즈 핏치를 첨가하였더라도 소성온도가 너무 낮으면 역시 용강에 대한 내식성이 저하됨을 알 수 있다.On the other hand, when the mesophase pitch is not added as in Comparative Example (1) or when too much is added as in Comparative Example (2), corrosion resistance to molten steel is lowered, and an appropriate amount as in Comparative Example (3) is obtained. Even if the mesophase pitch of is added, it can be seen that the corrosion resistance to molten steel is lowered if the firing temperature is too low.

상술한 바와 같이, 본 발명은 ZrB2에 메조페이즈 핏치를 첨가하여 소성함으로써, 소결성과 내식성이 우수한 용강 내식성 소재를 제조할 수 있는 효과가 있다.As described above, the present invention has the effect of producing a molten steel corrosion resistant material excellent in sintering and corrosion resistance by adding a mesophase pitch to ZrB 2 and baking it.

Claims (2)

순도 95％이상이고 평균 10㎛이하의 입도를 갖는 ZrB2:85-98중량％와 연화점이 280℃이상이며 1000℃에서의 탄화수율이 70중량％ 이상인 메조페이즈 핏치:2-15중량％로 조성됨을 특징으로 하는 용강 내식성 소재.ZrB 2 : 85-98 wt% with a purity of 95% or more and an average particle size of 10 μm or less, mesophase pitch of softening point of 280 ° C. or more and 70 wt% or more of carbonization at 1000 ° C .: 2-15 wt% Molten steel corrosion resistant material characterized in that. 원료를 혼합, 성형 및 소성하여 용강 내식성 소재를 제조하는 방법에 있어서, 순도 95％이상이고 평균 10㎛이하의 입도를 갖는 ZrB2:85-98중량％와 연화점이 280℃이상이며 1000℃에서의 탄화수율이 70중량％ 이상인 메조페이즈 핏치:2-15중량％를 혼합하여 성형한후, 불활성분위기 하에서 1700-2100℃의 온도범위를 30분-3시간동안 소성하는 것을 포함하여 이루어지는 용강 내식성 소재의 제조방법.In the method for producing molten steel corrosion resistant material by mixing, molding and firing raw materials, ZrB 2 : 85-98 wt% having a purity of 95% or more and an average particle size of 10 μm or less and a softening point of 280 ° C. or more and 1000 ° C. Mesophase pitch having a carbonization yield of 70% by weight or more: 2-15% by weight of a molten steel corrosion-resistant material comprising mixing and shaping a temperature range of 1700-2100 ° C. for 30 minutes-3 hours under an inert atmosphere. Manufacturing method.
KR1019950041923A 1995-11-17 1995-11-17 The manufacturing method for wear resistance material and same product KR100256364B1 (en)

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