KR20010092232A - Welding electrode - Google Patents
Welding electrode Download PDFInfo
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- KR20010092232A KR20010092232A KR1020000014309A KR20000014309A KR20010092232A KR 20010092232 A KR20010092232 A KR 20010092232A KR 1020000014309 A KR1020000014309 A KR 1020000014309A KR 20000014309 A KR20000014309 A KR 20000014309A KR 20010092232 A KR20010092232 A KR 20010092232A
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- carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
Description
본 발명은 우수한 내마모성이 요구되는 부품에 사용되는 함금 소재에 관한 것으로서, 보다 상세하게는 크롬 합금강 기지에 고경도의 텅스텐 티타늄 탄화물, (W,Ti)C로 강화되어 이루어진 내마모용 용접와이어에 관한 것이다.The present invention relates to a alloy material used for parts requiring excellent wear resistance, and more particularly, to a wear resistant welding wire made of a hardened tungsten titanium carbide, (W, Ti) C, on a chromium alloy steel base. will be.
산업설비용 내마모 부품으로 사용되는 합금은 주로 크롬탄화물을 함유하는 고크롬 철계합금으로 내마모성을 필요로 하는 분야에 널리 이용되고 있다. 고크롬 철계합금은 주물이나 육성용접에 의해 제조되며 타 재질에 비해 가격이 저렴하면서 우수한 내마모성을 보인다는 것이 장점이다(이에 관해서는 미국특허 제1,671,384호, 미국특허 제1,245,552호를 보라)The alloy used as wear-resistant parts for industrial equipment is a high chromium iron-based alloy mainly containing chromium carbide, and is widely used in fields requiring wear resistance. High chromium iron alloys are manufactured by casting or brazing welding and have the advantage of being cheaper than other materials and showing excellent wear resistance (see US Pat. No. 1,671,384 and US Pat. No. 1,245,552).
그러나 합금제어를 통한 고크롬 철계합금의 개량이 산업계에서 주로 이루어지고 있지만, 저렴한 제조단가에 수명을 획기적으로 증가시켜 인건비 상승에 따른 마모설비의 유지보수비 증가에 대한 요구에는 부응하지 못하고 있다.However, although the improvement of high chromium-based alloys through alloy control is mainly performed in the industry, it does not meet the demand for increased maintenance costs of wear facilities due to the increase in labor costs by dramatically increasing the lifespan at low manufacturing costs.
이에 본 발명은 상기와 같은 제반 요구사항에 부응하기 위하여 안출된 것으로, 종래의 내마모재에 널리 쓰이고 있는 고크롬 철계 합금보다 우수한 내마모성을 갖는 신합금을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to meet the above requirements, and an object of the present invention is to provide a new alloy having superior wear resistance than the high chromium iron-based alloy widely used in the conventional wear-resistant materials.
도 1은 본 발명과 종래기술에 따른 탄화물 분포와 크기에 대한 차이를 나타낸 도면,1 is a view showing the difference in the size and distribution of carbide according to the present invention and the prior art,
도 2는 강화 탄화물의 분율에 따른 크롬계 탄화물과 텅스텐-티타늄계 복합탄화물의 내마모 저항성의 차이를 나타낸 그래프이다.2 is a graph showing the difference in wear resistance between chromium carbide and tungsten-titanium composite carbide according to the fraction of reinforced carbide.
상기한 바와 같은 목적을 달성하기 위하여 본 발명은, 크롬탄화물((Cr,Fe)7C3)로만 강화시키는 일반 내마모 고크롬 재질과는 달리 텅스텐-티타늄 탄화물((W,Ti)C)을 고경도의 기지내엣 복합화함으로써 기존 재질에 비해 2-10배 정도의 내마모성을 갖는 새로운 개념의 내마모 합금으로 이루어진다.In order to achieve the above object, the present invention, unlike the general wear-resistant high chromium material reinforced only with chromium carbide ((Cr, Fe) 7 C 3 ) tungsten-titanium carbide ((W, Ti) C) It is composed of a new concept of wear-resistant alloy that has 2-10 times more wear resistance than the existing material by compounding the hard base inside.
본 발명은 충진분말 혼합체가 28-56 중량이고 나머지는 연강대(Mild Steel Strip) 외피로 구성된 용접와이어에 있어서, 충진분말 혼합체는 중량비로 탄소(C):0-1.0, 크롬(Cr):10-80, 규소(Si):0.1-10.0, 망간(Mn):0.1-10, 텅스텐-티타늄 탄화물((W,Ti)C):3-70그리고 순철(Fe):0-35의 분말 혼합체로 이루어짐을 특징으로 하는 내마모 설비 부품용 용접와이어이다.The present invention is a welding wire consisting of 28-56 weight of the powder powder mixture and the remainder of the Mild Steel Strip shell, the powder powder mixture is carbon (C): 0-1.0, chromium (Cr): 10 by weight ratio -80, silicon (Si): 0.1-10.0, manganese (Mn): 0.1-10, tungsten-titanium carbide ((W, Ti) C): 3-70 and pure iron (Fe): 0-35 Welding wire for wear-resistant equipment parts, characterized in that made.
본 발명의 합금은 주조에 의해 제조된 주조품 뿐만 아니라 용접용 와이어로 육성되는 육성용접용 재료로서 유용하다. 이하 본 발명의 성분 조성을 상기 범위로 하정한 이유를 설명한다.The alloy of the present invention is useful not only as a cast produced by casting but also as a welding material for growing welded wires. The reason for lowering the component composition of the present invention to the above range is explained below.
C원소는 본 발명합금에 함유된 Cr과 결합하여 M23C6(M은 Cr,Fe와 같은 금속원소를 지칭함)와 같은 미세한 크롬 탄화물을 형성시켜 기지의 경도를 상승시키는 작용을 한다. 그러므로 재료의 강도증가에 유효하며 경화성을 향상시키는 잇점이 있다.Element C combines with Cr contained in the alloy of the present invention to form fine chromium carbides such as M 23 C 6 (M refers to metal elements such as Cr and Fe) to increase the hardness of the matrix. Therefore, it is effective for increasing the strength of the material and has the advantage of improving the hardenability.
본 발명에서는 탄소를 별도로 첨가하지 않아도 강화탄화물로 첨가되는 텅스텐-티타늄 탄화물((W,Ti)C)의 일부가 기지조직에 용해되거나 일반 탄소강인 모재로부터 혼합되는 일정량의 탄소를 기지에 고용되기 때문이다.In the present invention, since some of the tungsten-titanium carbide ((W, Ti) C) added as a reinforcing carbide is dissolved in the matrix structure or a certain amount of carbon is mixed in the matrix, which is mixed from a base carbon steel, even if carbon is not added separately. to be.
그러나 원소형태로 1.0이상의 C 첨가량은 텅스텐-티타늄 탄화물이나 미세 크롬계 탄화물에 포함되지 않는 유리탄소를 증가시켜 기지에 고용된 탄소량이 증가됨으로써 잔류 오스테나이트를 증가시킬 뿐만 아니라 내마모성을 저하시키는 단점이 있다.However, the addition of more than 1.0 C in elemental form increases the amount of free carbon that is not included in tungsten-titanium carbide or fine chromium-based carbides, thereby increasing the amount of carbon dissolved in the base, thereby increasing residual austenite and reducing wear resistance. .
Cr은 본 발명에서 고경도의 기지를 얻기 위하여 필요한 원소이다. 탄소와 철과의 복합적인 결합으로 저렴하게 고경질의 미세한 크롬탄화물을 형성하는 역할을 담당하며 동시에 내산화성에 대한 저항성도 증가시킨다. 베이나이트 조직(또는 마르텐사이트 조직)과 미세 탄화물을 얻기 위하여 10.0이상이 분말 혼합체에 구성되어야 하며 80이상에서는 기지조직에 델타-페라이트 분율이 증가하여 기지조직의 경도가 감소하는 단점이 있다.Cr is an element necessary for obtaining a high hardness matrix in the present invention. The combination of carbon and iron makes it possible to inexpensively form high-quality fine chromium carbides and at the same time increases resistance to oxidation. In order to obtain bainite tissue (or martensite tissue) and fine carbide, 10.0 or more should be formed in the powder mixture, and in 80 or more, the delta-ferrite fraction is increased in the matrix and thus the hardness of the matrix is reduced.
Si은 탈산원소로서 적어도 0.1의 첨가량이 필요하지만 10.0이상이 되면 파괴인성을 저하시키고 페라이트를 형성시키는 단점이 있다.Si needs to be added at least 0.1 as the deoxidation element, but when it is 10.0 or more, the fracture toughness is reduced and ferrite is formed.
Mn은 오스테나이트 안정화 원소로 소입성을 높이므로 0.1이상을 첨가해야 하지만 10.0를 초과하면 인성의 열화를 초래하게 된다.Mn is an austenite stabilizing element, which increases the hardenability, so it is necessary to add 0.1 or more, but when it exceeds 10.0, it causes deterioration of toughness.
순철(Fe)은 주어진 용접분말과 연강외피의 비율(분말 충진률)에서 기지조직의 목표조성에서 적중시키기 위하여 dummy 형태로 첨가되는 양이다. 그러므로 주어진 용접와이어 제조에 있어서 전혀 첨가되지 않을 수도 있으며 일정량 첨가시켜 목표 분말 충진률을 맞추기 위하여 일정량 첨가된다. 이때 분말 혼합체에 최고로 첨가될 수 있는 양은 35로 한정된다. 그 이상에서는 본 발명재의 특성을 나타내는 다른 합금원소의 적정량 첨가가 어려워지기 때문이다.Pure iron (Fe) is the amount added in dummy form to hit in the target composition of the matrix at the given ratio of weld powder to mild steel shell (powder filling rate). Therefore, it may not be added at all in the production of a given welding wire, and a certain amount is added to meet the target powder filling rate. The maximum amount that can be added to the powder mixture at this time is limited to 35. This is because it becomes difficult to add an appropriate amount of other alloy elements exhibiting the properties of the present invention.
(W,Ti)C는 본 발명의 용접와이어에 있어서 가장 핵심적인 첨가물로써 용착금속내에 1-4㎛의 매우 미세한 강화탄화물을 형성시켜 내마모성 향상에 기여한다. (W,Ti)C의 첨가량이 3미만이 되면 내마모성 향상에 대한 기여가 크게 없고 70를 초과하면 분말 혼합체의 유동성이 크게 감소하여 용접와이어의 제조가 어렵게 된다.(W, Ti) C is the most important additive in the welding wire of the present invention, which forms a very fine reinforcing carbide of 1-4 占 퐉 in the weld metal, thereby contributing to improved wear resistance. If the addition amount of (W, Ti) C is less than 3, there is no significant contribution to improvement of wear resistance, and if it exceeds 70, the flowability of the powder mixture is greatly reduced, making the welding wire difficult.
본 발명에서 (W,Ti)C 형태로 합금을 첨가하는 이유는 일반적으로 TiC(또는 Ti과 C)의 경우에 기지금속인 철에 비해 비중이 낮아 표층부에 편석이 발생하는 경우가 있어 이를 방지하기 위하여 철과 거의 비슷한 비중을 갖도록 설계된 (W,Ti)C 탄화물을 첨가하는 것이다.In the present invention, the reason for adding an alloy in the form of (W, Ti) C is that in the case of TiC (or Ti and C), the specific gravity is lower than that of iron, which is a base metal, and segregation may occur at the surface layer. For this purpose, (W, Ti) C carbide is designed to have a specific gravity almost similar to that of iron.
일반적으로 고크롬계 내마모 합금에서는 주요 강화탄화물이 M7C3(M은 Cr, Fe와 같은 금속원소를 지칭함)로 불리는 수십에서 수백㎛의 크롬계 탄화물로 구성되기 때문에 쉽게 박리되거나 파손되어 지속적인 마모에 저항성을 갖기가 어렵다는단점이 있다. 도한 이들 크롬계 탄화물은 응고중에 공정반응에 의해 형성되어 매우 수백에서 수천㎛가지 길게 배열되어 연성이 좋은 기지금속이 탄화물 전체를 지지해주기가 어렵다는 단점이 있다.In general, in high chromium wear resistant alloys, the major reinforcing carbides are composed of dozens to hundreds of micrometers of chromium carbides called M 7 C 3 (M refers to metal elements such as Cr and Fe), so they are easily peeled or broken and sustained. The disadvantage is that it is difficult to resist wear. In addition, these chromium-based carbides are formed by a process reaction during solidification, and are arranged in the order of hundreds to thousands of micrometers long, so that a ductile base metal is difficult to support the entire carbide.
그러나 본 발명합금은 일반 고크롬계 내마모합금과 비교하여 1-4㎛의 텅스텐-티타늄계 탄화물로 구성되어 극단적으로 미세할 뿐만 아니라 입??여태로 존재하여 연한 기지조직이 이들 강화 탄화물을 효과적으로 지지할 수 있다는 장점이 있다.However, the alloy of the present invention is composed of tungsten-titanium carbide having a thickness of 1-4 μm compared with general high chromium wear-resistant alloys, which is extremely fine as well as present in the presence of a soft base structure. The advantage is support.
이들 미세조직상의 차이는 도 1에 나타내었다.These microstructure differences are shown in FIG. 1.
그리고 텅스텐-티타늄계 탄화물의 비커스 경도는 ~2800로 크롬계 탄화물의 비커스 경도(~1400)에 비해 매우 높기 때문에 같은 양의 첨가에도 내마모재의 경도를 크게 향상시킬 수 있는 장점이 있다. 예를 들면 비커스 경도가 300인 기지금속에 각각 20의 탄화물이 첨가된 경우에 고크롬 내마모합금의 경도는 ~540인 반면에 텅스텐-티타늄계 탄화물이 첨가된 내마모 합금은 ~800으로 월등히 높은 비커스 경도를 얻을 수 있다.And since the Vickers hardness of tungsten-titanium carbide is ~ 2800 compared to the Vickers hardness of the chromium-based carbide (~ 1400), there is an advantage that can significantly improve the hardness of the wear-resistant material even in the same amount. For example, when 20 carbides are added to a base metal having a Vickers hardness of 300, the hardness of the high chromium wear alloy is 540 while the wear alloy containing tungsten-titanium carbide is ˜800. Vickers hardness can be obtained.
본 발명의 용접와이어를 이용하여 내마모용이나 내열용 롤을 육성용접하여 제조한 경우에는 이후에 500-700℃에서 템퍼링하는 열처리 공정을 사용하며 인성과 관계되는 기계적 특성을 한층 증가시킬 수 있다.In the case of manufacturing the wear-resistant or heat-resistant roll using the welding wire of the present invention by fusing and welding, it is possible to further increase the mechanical properties related to toughness by using a heat treatment process tempering at 500-700 ° C.
실시예 1Example 1
두께 12mm의 S45C 강판 위에 서버머지드 아크용접법을 이용하여 육성용접하였다. 육성용접재는 (W,Ti)C 함량을 다양하게 변화시킨 용접와이어를 이용하였다.육성용접은 2층으로 용접하여 육성층을 얻었으며 각 합금의 표면조성은 표 1에 요약하여 나타내었다. 용접조건은 250-450A, 20-28V로 역극성하에서 작업하였다.It was grown and welded on a S45C steel plate with a thickness of 12 mm by using a server-merged arc welding method. As the growth welding material, a welding wire having variously changed the content of (W, Ti) C was used. In the growth welding, a growth layer was obtained by welding in two layers, and the surface composition of each alloy is summarized in Table 1. The welding conditions were 250-450A and 20-28V under reverse polarity.
육성합금의 내마모성을 평가하기 위하여 ASTM G65-85의 방법에 따라 하중 20kg, 마모거리 4.5km, 회전속도 250rpm에서 수행하였으며 이때 사용된 모래는 0.15-0.3mm로 동일한 조건에서 평가하였다. 그 결과는 표 2에 잘 나타나있으며 육성재의 경도치도 함께 나타내었다.In order to evaluate the abrasion resistance of the growth alloy, it was carried out at 20kg load, 4.5km wear and 250rpm speed according to the method of ASTM G65-85, and the sand used was evaluated under the same conditions as 0.15-0.3mm. The results are well shown in Table 2, and also showed the hardness value of the growth material.
파괴인성시험은 두께(B):5mm, 두께(B)/폭(W)의 비:1/4로 시편의 모든 치수비는 ASTM-E399 규정을 따라 가공된 compact tension(CT)시편을 이용하여 수행하였다. 내마모용 육성용접합금은 대체로 취약하여 예비피로균열을 만들기 어렵고, 초고장력강, 금속복합재료 등에서는 30-50㎛ 정도의 날카로운 토치를 가진 CT 시편으로 구한 겉보기 파괴인성(Apparent Fracture Toughness)은 예비피로균열을 도입한 평면변형파괴인성(KIC)과 거의 비슷한 값을 가진다는 것이 알려져 있으므로 날카로운 노치를 가진 CT 시편을 사용하여 겉보기 파괴인성을 측정하였다.Fracture toughness test is a thickness (B): 5mm, thickness (B) / width (W) ratio: 1/4, all dimensions ratio of the specimen using a compact tension (CT) specimen processed according to ASTM-E399 Was performed. Abrasion resistant weld alloys are generally fragile, making it difficult to create pre-fatigue cracks, and the apparent fracture toughness obtained from CT specimens with a sharp torch of about 30-50㎛ in ultra high tensile strength steel and metal composite materials The apparent fracture toughness was measured using CT specimens with sharp notches because it is known to have a value similar to the plane strain fracture toughness (K IC ) introduced with cracks.
약 1.3mm 길이의 날카로운 노치(반경:36㎛)를 방전가공(electrical discharge machining;EDM)으로 CT 시편에 삽입하였다. Servo-Hydraulic Instron(model 8501)을 사용하여 ASTM-E399 규정에 따라 파괴인성시험하였고, 하중속도는 약 1MPa/sec로 하였다. 측정된 파괴인성치는 표 2에 정리하여 나타내었다.A sharp notch (radius: 36 μm) of about 1.3 mm length was inserted into the CT specimens by electrical discharge machining (EDM). The fracture toughness test was carried out using Servo-Hydraulic Instron (model 8501) according to ASTM-E399. The load speed was about 1 MPa / sec. The measured fracture toughness values are summarized in Table 2.
*: M7C3계 크롬탄화물의 분율 ,**: (W,Ti)C계 복합탄화물의 분율 * : Fraction of M 7 C 3 chromium carbide, ** : fraction of (W, Ti) C complex carbide
표 2에서 비교재와 본 발명 용접와이어로 육성된 육성합금의 경도를 보면 본 발명재의 합금이 경도가 소량 낮게 나타난다. 그러나 내마모 저항성은 비슷하거나 최대 10배 이상 향상됨을 알 수 있다. 특히 비교재 1과 발명재 1을 서로 비교하면 비교재의 경우 강화탄화물이 39나 함유됨에도 불구하고 마모량은 0.45g으로 본 발명의 육성합금은 비교합금의 10분의 1수준인 3.4의 함유에도 불구하고 비슷한 내마모성을 갖는다. 이러한 경향은 다른 발명재에서도 같은 효과를 나타내며 그 결과들은 본 발명의 용접와이어가 내마모 저항성에 효과적으로 기여함을 단적으로 보여준다. 특히 발명재 5의 경우에는 약 18.5의 텅스텐-티타늄 탄화물 첨가에도 불구하고 37-39의 크롬 탄화물이 첨가도니 비교재에 비해 10배정도의 내마모성 향상효과가 있다. 그리고 용착금속의 인성도 높은 내마모 저항성에도 불구하고 기존의 고크롬계 내마모합금보다 우수한 수준을 유지한다.When looking at the hardness of the growth alloy in the comparative material and the welding wire of the present invention in Table 2, the alloy of the present invention exhibits a small amount of hardness. However, it can be seen that the wear resistance is similar or improved up to 10 times or more. In particular, when comparing the comparative material 1 and the inventive material 1, the comparative material contained 39 reinforcing carbides, but the wear amount was 0.45 g, and the growth alloy of the present invention was found to contain 3.4, which is one tenth of the comparative alloys. Similar wear resistance This tendency shows the same effect in other inventions, and the results show that the welding wire of the present invention effectively contributes to the wear resistance. In particular, in the case of Inventive Material 5, despite the addition of tungsten-titanium carbide of about 18.5, 37-39 chromium carbide has a 10 times improvement in wear resistance compared to the comparative material. And despite the high wear resistance of the weld metal, it maintains a higher level than the existing high chromium wear resistant alloys.
본 발명 합금의 내마모성은 도 2에 나타낸 바와 같이 같은 강화탄화물의 분율에서 기존의 고크롬 철계 내마모합금과 비교하여 얼마나 우수한지를 잘 보여주고 있다.As shown in FIG. 2, the wear resistance of the alloy of the present invention shows how much superior to the conventional high chromium iron-based wear alloy at the same fraction of the reinforced carbide.
이상 설명한 바와 같은 본 발명에 따른 내마모용 용접와이어에 의하면, 내마모 특성은 매우 우수하여 기존의 고크롬 철계 내마모합금이 M7C3의 크롬탄화물로 강화된 내마모 한계를 넘어서는 우수한 용접와이어 및 용착합금으로 대체함으로서 내마모 관련 산업설비의 설계수명을 연장시켜 에너지 절감 및 유지보수비용의 극단적인 절감이 가능하다.According to the wear-resistant welding wire according to the present invention as described above, the wear resistance is very excellent, the existing high chromium iron-based wear alloy is superior to the wear-resistant limit that is reinforced with chromium carbide of M 7 C 3 And by replacing with the welding alloy, it is possible to extend the design life of wear-related industrial equipment, and to reduce the energy saving and maintenance cost.
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| CN104646860A (en) * | 2015-02-12 | 2015-05-27 | 西安理工大学 | Titanium carbide enhanced type residue-free wear-resisting surfacing flux-cored wire and preparation method thereof |
| CN104708226A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | Titanium carbide type self-protective wear-resistant bead weld flux-cored wire and preparation method thereof |
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| JP2703713B2 (en) * | 1993-07-14 | 1998-01-26 | 株式会社神戸製鋼所 | Composite powder materials for powder plasma welding |
| KR100189298B1 (en) * | 1996-12-24 | 1999-06-01 | 홍상복 | Hardfacing wire |
| KR100340586B1 (en) * | 1997-12-23 | 2002-07-18 | 신현준 | Powder for plasma-pladded weld having a homogeneous dispeasion of addtive particle |
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| CN104646860A (en) * | 2015-02-12 | 2015-05-27 | 西安理工大学 | Titanium carbide enhanced type residue-free wear-resisting surfacing flux-cored wire and preparation method thereof |
| CN104708226A (en) * | 2015-02-12 | 2015-06-17 | 西安理工大学 | Titanium carbide type self-protective wear-resistant bead weld flux-cored wire and preparation method thereof |
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