摘要:
The purpose of the present invention is to provide a powder bond and a powder bond manufacturing method. The powder bond is manufactured by mixing and heat-treating boron alloy-iron powder, and by boriding an object powder while depressing the melting point of the boron alloy-iron powder by de-boronizing the boron alloy-iron powder. Provided according to one aspect of the present invention is a powder bond method comprising a step for bonding the de-boronized boron alloy-iron powder and the de-boronized object powder by heating the de-boronized boron alloy-iron powder and the borided object powder at the fixed temperatures.
摘要:
PURPOSE: Carbon steel granules and a carbide-coating method thereof are provided to apply to carbon steel powder, which is uniformly coated with carbide, a ball for a valve, a bearing, and a chain pin for which abrasion-resistance and corrosion-resistance are required, thereby reducing friction coefficient and noise, or improving lifetime. CONSTITUTION: A carbide-coating method of carbon steel granules comprises: a step of rotating and heating a retort(10) surrounded by a furnace body(20) which has a heating part(22), and mutually reacting the carbon steel granules with raw materials for forming carbide which are inserted inside the retort; a step of separating and eliminating the furnace body from the outer circumference surface of the retort; and a step of rotating and cooling the retort. Carbon content of the carbon steel granules is in the range of 0.2 to 5 wt%. The carbon steel granules are carbon steel powder. The carbon steel granules are a steel ball, a bearing, a chain pin, a ball for a valve, a shot ball, a grit or cutting chips which comprise carbon steel. The raw materials for forming carbide include elements for forming carbide. The average diameter of the raw materials for forming carbide is smaller than the average diameter of the carbon steel granules. The raw materials for forming carbide includes at least one titanium(Ti) powder, titanium oxide(TiO2) powder, and ferro-titanium(Fe-Ti) powder.
摘要:
고융점 금속 합금, 고융점 금속 규화물, 고융점 금속 탄화물, 고융점 금속 질화물 혹은 고융점 금속 붕소화물의 난소결체로 이루어지는 타겟재와 타겟재 이외의 고융점 금속판이 접합된 구조를 구비하고 있는 것을 특징으로 하는 고융점 금속 합금, 고융점 금속 규화물, 고융점 금속 탄화물, 고융점 금속 질화물 혹은 고융점 금속 붕소화물의 난소결체로 이루어지는 타겟. 기계 가공이 어려운 고융점 금속 합금, 고융점 금속 규화물, 고융점 금속 탄화물, 고융점 금속 질화물 혹은 고융점 금속 붕소화물의 난소결체로 이루어지는 타겟을 비교적 용이하게 제조할 수 있도록 함과 함께, 타겟 제조시 및 하이 파워 스퍼터링시의 균열의 발생을 효과적으로 억제하며, 또 타겟 원료의 핫 프레스시에 있어서의 다이와의 반응을 억제하고, 추가로 타겟의 휨을 저감시킬 수 있는 고융점 금속 합금, 고융점 금속 규화물, 고융점 금속 탄화물, 고융점 금속 질화물 혹은 고융점 금속 붕소화물의 난소결체로 이루어지는 타겟 및 그 제조 방법을 제공한다.
摘要:
A coated cemented carbide useful for heavy duty operations is provided to obtain an insert used for a roughing work by forming a binder phase enriched surface zone. A coated cemented carbide useful for heavy duty operations comprises a cemented carbide insert body having a stratified binder phase enriched surface zone and a coating material. The stratified binder phase enriched surface zone has a binder content 1.5 to 4 times, preferably 2 to 3 times, as much as nominal binder. The stratified binder phase enriched surface zone has a thickness of 15 to 45 micrometers, preferably 20 to 40 micrometers, most preferably 25 to 35 micrometers. The stratified binder phase enriched surface zone and a zone under the stratified binder phase enriched surface zone having a thickness of about 100 to 300 micrometers represent a porosity of carbon in COO. An inner middle part of the cemented carbide insert body has a carbon porosity of C0.6 TO C0.8, preferably C0.8. An inscribed circle of the insert has a diameter of 19mm or above, preferably 30 to 60mm, and has a thickness of 6mm or above, preferably 9 to 20mm.
摘要:
PURPOSE: A method for manufacturing surface composite material using high energy accelerated electron beam is provided to simplify surface composite material process by using high energy accelerated electron beam and greatly improve wear resistance by enabling formation of single layer and multilayer surface composite materials. CONSTITUTION: The method comprises first step of coating a mixed body(10) in which ceramic powder of vanadium carbide (VC) is mixed with calcium fluoride (CaF2) solvent on titanium alloy(12); second step of pressing the mixed body so that the mixed body is closely adhered to the titanium alloy; and third step of forming a surface composite layer on the titanium alloy by uniformly projecting high energy electron beam onto the mixed body coated surface, wherein the method further comprises a step of forming a multilayer of surface composite material by repeating the first to third steps for one or more times, wherein the titanium alloy(12) is Ti-6Al-4V, wherein a ratio of VC ceramic powder to solvent CaF2 is 6:4 in the mixed body(10), and wherein electron energy of the high energy electron beam is 1.4 MeV.
摘要:
PURPOSE: A process for preparing TiC based surface reinforced composite material comprising matrix metal, a heat-affected zone formed on the matrix metal and a surface composite layer formed on the heat-affected zone using accelerated electron beam is provided, which improves productivity and reduces the cost of production. CONSTITUTION: The titled compound is prepared by the process consisting of: uniformly coating mixture powder of TiC and a solvent on a base metal; pressing the coated mixture powder and compacting; dispersing TiC into the specified depth from the surface of matrix metal by projecting accelerated electron beam on the matrix metal covered with compact mixture powder; and depositing the dispersed TiC in article form.