KR980009495A - Fe-Cr-Ni alloy material with good pressability and manufacturing method - Google Patents

Fe-Cr-Ni alloy material with good pressability and manufacturing method Download PDF

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KR980009495A
KR980009495A KR1019970022507A KR19970022507A KR980009495A KR 980009495 A KR980009495 A KR 980009495A KR 1019970022507 A KR1019970022507 A KR 1019970022507A KR 19970022507 A KR19970022507 A KR 19970022507A KR 980009495 A KR980009495 A KR 980009495A
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alloy material
electron gun
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grain size
surface roughness
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마시히로 츠지
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사카모토 마사루
닛코킨조쿠 가부시기가이샤
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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns

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  • Heat Treatment Of Sheet Steel (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

본 발명은, 프레스성이 양호한 전자총 부품용 Fe-Cr-Ni합금소재 및 그 제조방법의 개발을 과제로한 것이며, 중량%로서, Cr15∼20%, Ni19∼15%, 나머지 Fe 및 불가피적 불순물로 이루어진 합금소재를 최종어닐링에 의해서 결정입도가 오스테나이트결정입도로 표시해서 No. 7∼12이도록 조정하고 그리고 기계적인 표면연마 또는 압연에 의해 중심선평균거칠기(Ra)가 0.05∼0.25㎛ 또한 최대높이(Rmax)가 3.5㎛이하이도록 소재표면거칠기를 조절하는 것을 특징으로 한 것이다.The present invention aims to develop a Fe-Cr-Ni alloy material for an electron gun component having good pressability and a method for manufacturing the same. The weight percentage is Cr 15 to 20%, Ni 19 to 15%, remaining Fe and unavoidable impurities The crystal grain size is expressed as austenite grain size by the final annealing of the alloy material consisting of The surface roughness is adjusted so that the center line average roughness (Ra) is 0.05 to 0.25 μm and the maximum height (Rmax) is 3.5 μm or less by mechanical surface polishing or rolling.

Description

프레스성이 양호한 Fe-Cr-Ni계 합금소재 및 그 제조방법Fe-Cr-Ni alloy material with good pressability and manufacturing method

본 발명은, 프레스성이 양호한 Fe-Cr-Ni합금소재 및 그 제조방법에 관한 것이고, 특히 전자총부품, 예를 들면 전자총전극재료에 사용되는 비자성스테인리스강에 있어서 드로잉가공을 위한 프레스가공성을 향상시킨 Fe-Cr-Ni계 합금소재 및 그 제조방법에 관한 것이다.The present invention relates to a Fe-Cr-Ni alloy material having a good pressability and a method for manufacturing the same, and in particular, improves the press workability for drawing processing in non-magnetic stainless steel used for electron gun parts, for example, electron gun electrode materials. It relates to a Fe-Cr-Ni-based alloy material and a manufacturing method thereof.

일반적으로, 수상관 등에 사용되는 전자총부품은, 판두께 0.05∼0.5mm정도의 비자성 스테인리스강인 Fe-Cr-Ni계 합금재를 프레스가공에 의해 소정형상으로 드로잉 가공됨으로써 만들어진다.In general, an electron gun component used for a water tube or the like is made by drawing a Fe-Cr-Ni alloy material, which is a nonmagnetic stainless steel having a sheet thickness of about 0.05 to 0.5 mm, into a predetermined shape by press working.

드로잉성을 향상시키기 위하여, 특히 버링성형(둥근구멍을 뚫어서 가장자리를 내는 방법)을 용이하게 하기 위하여 압연가공률이나 어닐링조건을 검토한 기술(일본국 특원평 6-257253)이 제안되고 있다.In order to improve the drawing property, a technique (Japanese Patent Application Laid-Open No. 6-257253) which examines a rolling processing rate and annealing conditions has been proposed, particularly in order to facilitate burring molding (method of punching round holes).

그러나, 최근 프레스가공속도의 향상이 한층더 추구되는 동시에, 프레스할때에 사용되는 오일도 저점도이고 탈지하기 쉬운 것이 사용되는 경항에 있고, 드로잉 가공에 있어서는 드로잉가공갈라짐이 발생하기 쉬운 까다로운 조건이 되고 있다.However, in recent years, the press processing speed has been further improved, and at the same time, the oil used in the press has a low viscosity and is easy to degrease. It is becoming.

그 때문에 종래의 재료에서는 반드시 만족할 수 있는 결과를 얻을 수 없고, 프레스가공성의 더 한층 개선이 강하게 요망되고 있다. 본 발명의 과제는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재 및 그 제조방법의 개발이다.For this reason, in the conventional materials, a satisfactory result cannot be obtained, and further improvement in press workability is strongly desired. An object of the present invention is to develop a Fe-Cr-Ni-based alloy material for an electron gun component having good pressability and a method of manufacturing the same.

이러한 과제에 대처하기 위하여 연구를 거듭한 결과, Fe-Cr-Ni계 합금소재에 있어서, 결정입도를 오스테나이트결정입도로서 7.0∼12.0으로 하고, 금속표면의 거칠기를 중심선평균거칠기(Ra)로서 0.05∼0.25㎛, 최대높이(Rmax)로서 3.5㎛이하로 하므로써, 드로잉가공성을 더욱 개선할 수 있는 것이 판명되었다.In order to cope with such a problem, as a result of research, the Fe-Cr-Ni alloy material has a grain size of 7.0 to 12.0 as the austenite grain size, and the roughness of the metal surface is 0.05 as the centerline average roughness (Ra). By setting it as -0.25 micrometer and 3.5 micrometers or less as maximum height Rmax, it turned out that drawing processability can be improved further.

종래, 드로잉가공성과의 관련에서 표면거칠기의 정량화, 또한 Ra, Ramx의 2개의 지표의 정량화에 의해 개선이 얻어진다는 지견은 없다.Conventionally, there is no knowledge that improvement is obtained by quantification of surface roughness and quantification of two indices of Ra and Ramx in relation to drawing workability.

이 지견에 의거해서, 본 발명은, (1)중량%로서, Cr15∼20%, Ni9∼15%, 나머지부 Fe 및 불가피적 불순물로 이루어진 합금소재로서, 결정입도가 오스테나이트 결정입도로 표시해서 No.7∼12이고 그리고 중심선평균거칠기(Ra)가 0.05∼0.25㎛ 또한 최대높이(Rmax)가 3.5μm이하인 표면거칠기를 가진 것을 특징으로 하는 프레스성이 양호한 전자총부푸용 Fe-Cr-Ni계 합금소재, 및 (2)중량%로서, Cr15∼20%, Ni9∼15%, 나머지부 Fe 및 불가피적 불순물로 이루어진 합금소재를 최종어닐링에 의해서, 결정입도가 오스테나이트결정입도로 표시해서 No.7∼12이고 그리고 중심선평균거칠기(Ra)가 0.05∼0.25㎛ 또한 최대높이(Rmax)가 3.5㎛이하이도록 소재표면거칠기를 조절하는 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재의 제조방법을 제공한다.Based on this knowledge, the present invention is (1) weight%, an alloy material composed of Cr 15 to 20%, Ni 9 to 15%, remainder Fe and unavoidable impurities, and the crystal grain size is expressed as austenite grain size. The Fe-Cr-Ni system for press guns with good pressability, characterized by No. 7 to 12 and a surface roughness with a centerline average roughness (Ra) of 0.05 to 0.25 μm and a maximum height (R max ) of 3.5 μm or less. The alloy material and (2) the weight%, the alloy material consisting of Cr 15 to 20%, Ni 9 to 15%, the remainder Fe and unavoidable impurities by final annealing, the crystal grain size is expressed as austenite crystal grain size No. Fe-Cr-Ni series for electronic gun parts having good pressability, characterized in that the material surface roughness is controlled to be 7 to 12 and the center line average roughness (Ra) is 0.05 to 0.25 탆 and the maximum height (Rmax) is 3.5 탆 or less. It provides a method for producing an alloy material.

표면거칠기의 조절은, 기계적인 표면연마 또는 압연에 의해 실시할 수 있다. 프레스가공의 직전에 기계적인 표면연마를 실시하는 것이 추장된다. 본 발명의 전자총부품용 Fe-Cr-Ni계 합금소재의 합금성분한정이유 및 결정입도 및 표면거칠기의 한정이유를 이하에 설명한다.Control of surface roughness can be performed by mechanical surface polishing or rolling. It is recommended to perform mechanical surface polishing immediately before press working. The reason for the alloy component limitation and the reason for the grain size and the surface roughness of the Fe-Cr-Ni alloy material for an electron gun component of the present invention will be described below.

(Cr) : 전자총용 부품으로서는 비자성이라는 것이 요구된다. 통상, 비자성이기 위해서는 투자율이 1.005이하인 것이 요구되고 있고, 이것을 만족시키기 위해서는 Cr량을 적정범위로 조정하는 것이 필요하다. 따라서 그 성분범위를 15∼20%로 한다.(Cr): The parts for electron guns are required to be nonmagnetic. Usually, in order to be nonmagnetic, it is required that the permeability is 1.005 or less, and in order to satisfy this, it is necessary to adjust Cr amount to an appropriate range. Therefore, the component range is made into 15 to 20%.

(Ni) : Ni가 9%보다 적으면 자성이 지나치게 높아지는 데다가, 가공성을 저해한다. 또 15%보다 많이 함유하는 경우도, 가공성이 저해되는 데다가 원가상승이 된다. 따라서 그 성분범위를 9∼15%로 한다.(Ni): When Ni is less than 9%, the magnetism becomes too high and workability is impaired. Moreover, when it contains more than 15%, workability will be impaired and a cost will increase. Therefore, the component range is 9 to 15%.

본 발명의 전자총부품용 Fe-Cr-Ni계 합금소재는, 그 결정입도를 오스테나이트결정입도로 표시해서 7∼12로 조정된다. No.7∼12로 하는 이유는, 7보다 작으면 프레스할때에 프레스품표면에 거칠어짐이 발생하고, 12보다 크면 드로잉성이 저하하여, 갈라짐이 발생하기 쉽게 되기 때문이다.The Fe-Cr-Ni alloy material for an electron gun component of the present invention is adjusted to 7 to 12 by displaying its crystal grain size as an austenite grain size. The reason of Nos. 7 to 12 is that when it is smaller than 7, roughness occurs on the surface of the press product when pressed, and when it is larger than 12, the drawing property is lowered and cracking is likely to occur.

또, 본 발명의 전자총부품용 Fe-Cr-Ni계 합금소재는, 중심선평균거칠기(Ra)가 0.05∼0.25㎛ 또한 최대높이(Ramx)가 3.5㎛이하인 표면거칠기를 가진 것이 된다. 거칠기의 측정은 표면거칠기측정기에 의해서 행하였다.The Fe-Cr-Ni alloy material for an electron gun component of the present invention has a surface roughness with a center line average roughness Ra of 0.05 to 0.25 µm and a maximum height Ramx of 3.5 µm or less. The roughness was measured by a surface roughness measuring instrument.

중심선평균거칠기(Ra)를 0.05∼0.25㎛로 하는 이유는, 0.05㎛보다 작으면 프레스성의 개선이 확인되지 않고, 0.25㎛를 넘으면 프레스성의 개선을 포화하고, 반대로 표면이 거칠어지기 때문이다.The reason why the center line average roughness Ra is 0.05 to 0.25 탆 is because improvement in pressability is not observed when smaller than 0.05 탆, and when the thickness exceeds 0.25 탆, the press saturation is saturated and the surface becomes rough.

최대높이(Ramx)를 3.4㎛이하로 하는 이유는 3.5㎛를 넘으면 갈라짐이 발생하기 쉬워지고 프레스성의 개 선을 볼 수 없게 되기 때문이다.The reason why the maximum height Ramx is 3.4 µm or less is because when it exceeds 3.5 µm, cracking is more likely to occur, and improvement in pressability is not seen.

프레스성의 개선은, 프레스가공시에 재료표면의 오목볼록에 오일이 들어가고, 오일유지가 좋아지기 때문이라고 생각된다.It is considered that the improvement of the pressability is due to the fact that oil enters into the concave convex on the material surface during press working, and the oil holding is improved.

본 발명의 전자총부품용 Fe-Cr-Ni계 합금은, 예를 들면 하기와 같이 해서 제조된다. 먼저 상기한 각 함유성분의 조성비를 만족시킨 합금성분을 용해, 주조하고, 이어서, 열간단조 또는 압연을 실시한 후, 냉간압연과 어닐링을 반복해서 소정의 두께로 마무리한다.The Fe-Cr-Ni type alloy for electron gun parts of this invention is manufactured as follows, for example. First, an alloy component that satisfies the composition ratio of each of the above-mentioned components is melted and cast, followed by hot forging or rolling, followed by cold rolling and annealing to finish to a predetermined thickness.

이때, 최종어닐링에 의해서 오스테나이트결정입도가 7∼12가 되도록 조정한다.At this time, it adjusts so that austenite grain size may be 7-12 by final annealing.

중심선평균거칠기(Ra) 및 최대높이(Rmax)의 조절은 최종판두께가 된 재료를 버프, 연마석, 커터 등에 의해서 기계적으로 표면연마함으로써 실시할 수도 있고, 또 최종압연시에 표면거칠기를 조절함으로서도 실시할 수 있다.The center line average roughness (Ra) and the maximum height (Rmax) can be adjusted by mechanically polishing the final plate thickness with a buff, abrasive stone, cutter, etc., or by adjusting the surface roughness during final rolling. can do.

표 1에 표시한 조성의 합금성분을 각각 용해해서 주괴(ingot)에 주조하고, 이어서, 열간압연을 실시한 후 냉간압연과 어닐링을 반복해서 판두께 0.4mm의 어닐링재를 제조했다.The alloy components of the compositions shown in Table 1 were dissolved and cast in ingots, followed by hot rolling, and then cold rolling and annealing were repeated to produce an annealing material having a thickness of 0.4 mm.

이 어닐링재를 각종의 거칠기를 가진 연마재 및 SiC를 함침시킨 비행기용익포에 의해서 기계적으로 표면연마를 행하였다.The annealing material was subjected to surface polishing mechanically with an abrasive having various roughness and a plane blade impregnated with SiC.

또, 이것과는 별도로, 최종압연시에 각종의 거칠기를 가진 압연롤(덜롤)을 사용해서 압연하고, 표면거칠기가 다른 재료를 제조하고, 최종어닐링을 행한 것도 제조했다.Apart from this, a rolled roll (rolling roll) having various roughnesses at the time of final rolling was used to produce a material having a different surface roughness, and a final annealing was also produced.

그리고 이들 재료의 프레스성(드로잉성)을 조사하기 위하여 한계드로잉비를 구했다. 이 한계드로잉비는, 하중디프드로잉성시험에 의해 컵벽강도와 플랜지변형력을 구하고, 그 교점으로부터 구한 것이다. 또한, 프레스시의 윤활제로서는 수용성 왁스를 사용했다.And the limit drawing ratio was calculated | required in order to investigate the press property (drawing property) of these materials. This limit drawing ratio is obtained from the intersection of the cup wall strength and the flange deformation force by load deep drawing test. In addition, water-soluble wax was used as a lubricant at the time of a press.

이것과는 별도로 드로잉비 1.33에서 모든 공시재를 평저펀치를 사용해서 드로잉하고, 가공품에 표면거칠어짐이 있는지 어떤지의 평가를 행하였다. 결과를 표 1에 병기했다.Apart from this, all test materials were drawn using a flat bottom punch at drawing ratio 1.33, and evaluated whether or not the workpiece had a surface roughness. The results are written together in Table 1.

표 1Table 1

표 1로부터 명백한 바와 같이, 본 발명 합금 No.1∼4는, 비교합금 No.5∼8에 비해서 모두 한계드로잉비가 크고, 우수한 드로잉성을 나타내고 있다.As is apparent from Table 1, alloy Nos. 1 to 4 of the present invention have a larger limit drawing ratio than those of Comparative Alloys Nos. 5 to 8, and show excellent drawing properties.

또, 비교합금 No.8과 비교해서 명백한 바와 같이 결정입도가 지나치게 크면(결정입도No. 가 6으로 작으면) 표면거칠어짐의 발생이 확인되고, 프레스제품으로서는 부적당하다.As apparent from the comparison with Comparative Alloy No. 8, when the crystal grain size is too large (if the grain size No. is small to 6), the occurrence of surface roughness is confirmed, which is not suitable as a press product.

이상과 같이, 본 발명의 Fe-Cr-Ni계 합금소재는, 프레스성을 현저하게 향상시키고, 엄격한 프레스조건에서 가공되어도 드로잉가공갈라짐이 발생하기 어려운 재료이다. 따라서, 전자총부품의 가공에 대한 금후의 엄격한 요구에 대응할 수 있다.As described above, the Fe-Cr-Ni-based alloy material of the present invention significantly improves the pressability, and is hardly generated in drawing processing even when processed under strict press conditions. Therefore, it is possible to meet future strict demands on the processing of the electron gun parts.

Claims (5)

중량%로서, Cr15∼20%, Ni9∼15%, 나머지부 Fe 및 불가피적 불순물로 이루어진 합금소재로서, 결정도입도가 오스테나이트결정입도로 표시해서 No.7∼12이고 그리고 중심선평균거칠기(Ra)가 0.05∼0.25㎛ 또는 최대높이(Rmax)가 3.5μm이하인 표면 거칠기를 가진 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재.An alloy material composed of Cr 15 to 20%, Ni 9 to 15%, remainder Fe and unavoidable impurities as weight%, the crystal incorporation degree is expressed as austenite grain size and is No. 7 to 12 and the center line average roughness (Ra). A Fe-Cr-Ni alloy material for an electron gun component having good pressability, having a surface roughness of 0.05 to 0.25 µm or a maximum height (Rmax) of 3.5 µm or less. 중량%로서, Cr15∼20%, Ni9∼15%, 나머지부Fe 및 불가피적 불순물로 이루어진 합금재를 최종어닐링에 의해서 결정입도가 오스테나이트결정도입도로 표시해서 No.7∼12이도록 조정하고 그리고 중심선평균거칠기(Ra)가 0.05㎛∼0.25㎛ 또한 최대폰이(Ramx)가 3.5㎛이하이도록 소재표면거칠기를 조절하는 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재의 제조방법.By weight annealing, an alloy material composed of Cr 15 to 20%, Ni 9 to 15%, remaining Fe, and unavoidable impurities is adjusted to No. 7 to 12 by displaying the crystal grain size as austenite crystal induction by final annealing, and the center line Manufacture of Fe-Cr-Ni alloy material for electromagnetic gun parts having good press characteristics, characterized in that the surface roughness of the material is adjusted so that the average roughness (Ra) is 0.05 µm to 0.25 µm and the maximum pavement (Ramx) is 3.5 µm or less. Way. 제2항에 있어서, 표면거칠기의 조절을 기계적인 표면연마에 의해 실시하는 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재의 제조방법.The method of manufacturing a Fe-Cr-Ni alloy material for an electron gun component having good pressability according to claim 2, wherein the surface roughness is controlled by mechanical surface polishing. 제3항에 있어서, 프레스가공의 진전에 기계적인 표면연마를 실시하는 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재의 제조방법.4. The method of manufacturing a Fe-Cr-Ni alloy material for an electron gun component having good pressability according to claim 3, wherein mechanical surface polishing is performed before the press working. 제2항에 있어서, 표면거칠기의 조절을 압연에 의해 실시하는 것을 특징으로 하는 프레스성이 양호한 전자총부품용 Fe-Cr-Ni계 합금소재의 제조방법.The method of manufacturing a Fe-Cr-Ni alloy material for an electron gun component having good pressability according to claim 2, wherein the surface roughness is controlled by rolling. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019970022507A 1996-07-17 1997-05-31 The manufacturing method for fe-cr-ni alloy and the same goods KR100237536B1 (en)

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