KR970065746A

KR970065746A - Copper (Cu) - chromium (Cr) - mischmetal alloy and processing heat treatment

Info

Publication number: KR970065746A
Application number: KR1019960008085A
Authority: KR
Inventors: 김창주
Original assignee: 서상기; 한국기계연구원
Priority date: 1996-03-19
Filing date: 1996-03-19
Publication date: 1997-10-13
Also published as: KR0182228B1

Abstract

본 발명은 전기 접점재나 강판의 저항용접 및 점(스포트)용접용 전극재인 동(Cu)-크롬(Cr)-미쉬메탈(mischmetal) 합금의 제조와 그 특성을 발휘할 수 있는 가공열처리에 관한 것으로, 동(Cu)를 주성분으로 하고, 여기에 크롬(Cr)은 0.20∼1.45%(중량백분률)의 범위로 함유하고, 여기에 가공열처리시 세리움동 Cu_xCe, 란탄동 Cu_xLa, 니오디미움동 Cu_xNd, 및 프라새오디미움동 Cu_xPr등과 같은 석출물을 생성시킬 수 있는 성분의 화합물인 미쉬메탈(mischmetal)을 0.02%∼0.50%(중량백분률) 범위로 첨가한 것을 특징으로 하는 합금재료로서, 경도와 도전률을 각각 HRB60∼90, IACS 70∼95%범위로 유지시킬 수 있는 가공열처리에 관한 것이다.The present invention relates to the production of copper (Cu) - chromium (Cr) - mischmetal alloy as an electrode material for resistance welding and spot welding of electrical contact materials and steel sheets, and a processing heat treatment capable of exhibiting its properties. (Cr) is contained in the range of 0.20 to 1.45% (weight percentage), and the copper cerium copper Cu _x Ce, lanthanum copper Cu _x La, characterized in that the addition of mulberry hatred copper Cu _x Nd, and plastic new audio hated the copper metal miswi (mischmetal) compounds of the component which are capable of producing a precipitate, such as a Cu _x Pr 0.02% ~0.50% (weight percentage) range , Which is capable of maintaining the hardness and the conductivity at HR 60 to 90 and IACS 70 to 95%, respectively.

이렇게하여 제조된 재료는 고온에서 경도와 도전률이 우수하여, 전기접점이나 강판의 저항용접 및 스포트용접용 전극 등으로 상용되는 경우에 우수한 성능을 발휘하며, 그 제조방법은 다음과 같다.The material thus produced has excellent hardness and conductivity at high temperature and exhibits excellent performance when it is used as an electrode for resistance welding and spot welding of electrical contacts and steel plates.

즉, 상기의 동(Cu)합금을 용해 후 주괴를 제조하고, 상기를 주조조직을 제거할 수 있는 7S(약 85%)이상의 가공비로써 800∼950℃에서 단조, 압연, 압출 등을 행하고, 상기를 800∼1,050℃에서 두께 1인치 당 30분이상 유지한 후에 수냉, 유냉 등으로 급냉하여 용체화처리를 행하고, 상기를 상온에서 70%이상의 가공비로써 압연, 단조, 인발 등의 냉간가공을 행하고, 상기를 350∼550℃에서 1시간 이상 유지 후 수냉, 유냉, 공냉 등으로 시효 경화 열처리를 행하고, 상기의 과정을 마친 소재는 그 상태대로 사용하거나 전극 등의 부품을 제조하는 방법으로, 위의 공정 중에서 소재나 제품의 목표 특성에 따라, 냉간가공과 시효경화 열처리의 공정 순서를 바꿀 수도 있으며, 경우에 따라서는 냉간가공의 공정을 생략할 수도 있는 방법.That is, an ingot after dissolving the above-mentioned copper (Cu) alloy is produced and subjected to forging, rolling and extrusion at a temperature of 800 to 950 占 폚 at a machining ratio of 7S (about 85%) or more capable of removing the casting structure, Is cooled at a temperature of 800 to 1,050 占 폚 per one inch for 30 minutes or more and then subjected to solution treatment by quenching by water cooling or oil cooling to perform cold processing such as rolling, forging, drawing, etc. at a processing ratio of 70% The above materials are held at 350 to 550 캜 for 1 hour or more and then subjected to age hardening heat treatment by water cooling, oil cooling, air cooling and the like. The process order of the cold working and the aging hardening heat treatment may be changed according to the target characteristics of the material or the product in the case where the cold working process is omitted.

Description

Copper (Cu) - chromium (Cr) - michmetal alloy and processing heat treatment

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

Claims

, An electrical contact material containing 0.20 to 1.45% (by weight percentage) of chromium (Cr), 0.02% to 0.50% (by weight percentage) of the above mischmetal, Resistance welding and spot welding Electrode welding (Cu) alloy.

Rolling, and extruding at 800 to 950 占 폚 with a machining ratio of 7S (about 85%) or more capable of removing the casting structure, And then subjected to a solution treatment by quenching by water cooling or oil cooling or the like and subjected to cold treatment such as rolling, forging and drawing at a processing ratio of 70% or more at room temperature, Holding at 550 deg. C for 1 hour or more, followed by aging hardening heat treatment by water cooling, oil cooling, air cooling, etc., and the material thus processed is used in this state or parts such as electrodes are produced.

Rolling and extruding at 800 to 950 占 폚 with a machining ratio of 7S (about 85%) or more capable of removing the casting structure, After maintaining at a temperature of 800 to 1,050 캜 for 30 minutes or more per one inch, quenching is performed by quenching by water cooling or oil cooling, and the above solution is maintained at 350 to 550 캜 for 1 hour or more and then subjected to age hardening heat treatment by water cooling, And cold working such as rolling, forging and drawing is performed at room temperature at a processing cost of 70% or more, and the finished material is used in this state or parts such as electrodes are produced.

Rolling and extruding at 800 to 950 占 폚 with a machining ratio of 7S (about 85%) or more capable of removing the casting structure, After maintaining at a temperature of 800 to 1,050 占 폚 for 1 hour or more for 30 minutes or longer, the solution is subjected to solution treatment by quenching by water cooling or oil cooling, and the solution is maintained at 350 to 550 占 폚 for 1 hour or more, followed by aging hardening heat treatment And the material having been subjected to the above-described process is used as it is, or a part such as an electrode is produced.

※ Note: It is disclosed by the contents of the first application.