JPH0261027A - Ni-fe-cr high permeability magnetic alloy having excellent hot workability - Google Patents
Ni-fe-cr high permeability magnetic alloy having excellent hot workabilityInfo
- Publication number
- JPH0261027A JPH0261027A JP20828288A JP20828288A JPH0261027A JP H0261027 A JPH0261027 A JP H0261027A JP 20828288 A JP20828288 A JP 20828288A JP 20828288 A JP20828288 A JP 20828288A JP H0261027 A JPH0261027 A JP H0261027A
- Authority
- JP
- Japan
- Prior art keywords
- hot workability
- magnetic alloy
- high permeability
- permeability magnetic
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000035699 permeability Effects 0.000 title claims abstract description 28
- 229910001004 magnetic alloy Inorganic materials 0.000 title claims abstract description 23
- 229910017060 Fe Cr Inorganic materials 0.000 claims abstract description 17
- 229910002544 Fe-Cr Inorganic materials 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 238000005098 hot rolling Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000009864 tensile test Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は高透磁率磁性合金として利用される熱間加工性
の優れたNi−Fe−Cr合金に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a Ni-Fe-Cr alloy with excellent hot workability that is used as a high permeability magnetic alloy.
(従来技術とその問題点)
Ni−Fe−Cr系高透磁率磁性合金は、電子機器用材
として例えばオーディオ、VTR等のシールドケース材
やヘッドボアー材、あるいは高級トランスのコアーやヨ
ーク材として多くの用途がある。(Prior art and its problems) Ni-Fe-Cr based high permeability magnetic alloys have many uses as materials for electronic devices, such as shield case materials and head bore materials for audio and VTRs, and core and yoke materials for high-end transformers. There is.
近年の電子・電磁産業の発達にともない%’l1−Fs
−Cr系高透磁率磁性合金系譜透磁率磁性合金らに小型
高性能化が進むことで、このような高透磁率磁性合金の
特性の一層の向上が望まれている。With the development of electronic and electromagnetic industries in recent years, %'l1-Fs
-Cr-based high permeability magnetic alloy family As permeability magnetic alloys become smaller and more sophisticated, it is desired to further improve the characteristics of such high permeability magnetic alloys.
しかしながらNi−Fe−Cr系高透磁率磁性合金は熱
間加工性が著しく劣る。即ち1分塊や熱間圧延する場合
に割れ疵が多発することがある。このため製品歩留が著
しく低下し、製造コストが高くなるという問題がある。However, the Ni-Fe-Cr based high permeability magnetic alloy has extremely poor hot workability. That is, many cracks may occur when the steel is rolled or hot rolled. Therefore, there are problems in that the product yield is significantly reduced and manufacturing costs are increased.
従って製造コストを低減するためには熱間加工時の割れ
疵を防止して熱間加工性を改善する必要がある。Therefore, in order to reduce manufacturing costs, it is necessary to prevent cracks during hot working and improve hot workability.
このようなNi−Fe−Cr系高透磁率磁性合金の熱間
加工時の割れ原因としては、A1、S、Pなどの不純物
の偏析および酸化物、硫化物、窒化物などの結晶粒界析
出による脆化が考えられる。しかしAl。The causes of cracking during hot working of such Ni-Fe-Cr based high permeability magnetic alloys include segregation of impurities such as A1, S, and P, and grain boundary precipitation of oxides, sulfides, and nitrides. This may be due to embrittlement. But Al.
Sなどを低くしても割れ疵が発生することが多く、製品
歩留が低下することがあり、この問題を解決できる優れ
た熱間加工性を有するNi−Fe−Cr系高透磁率磁性
合金が望まれていた。Even if the S content is low, cracks often occur and the product yield may decrease.A Ni-Fe-Cr based high permeability magnetic alloy with excellent hot workability can solve this problem. was desired.
(問題解決に関する知見)
本発明は、高透磁率と優れた熱間加工性を得ることを課
題とし、課題解決に関しNi−Fe−Cr系高透磁率磁
性合金の組成を種々検討した結果、特定量のBを含有さ
せ、かつS、A1含有量を低減することにより、高透磁
率と優れた熱間加工性が得られるという知見を得た。(Knowledge related to problem solving) The present invention aims to obtain high magnetic permeability and excellent hot workability, and as a result of various studies on the composition of Ni-Fe-Cr based high permeability magnetic alloys in order to solve the problems, we have identified It has been found that high magnetic permeability and excellent hot workability can be obtained by containing a certain amount of B and reducing the S and A1 contents.
(発明の構成) 上記目的は、 C: 0.01%以下。(Structure of the invention) The above purpose is C: 0.01% or less.
Si: 2.0%以下。Si: 2.0% or less.
Mn: 5.0%以下。Mn: 5.0% or less.
P:0.02%以下。P: 0.02% or less.
S:0.01%以下。S: 0.01% or less.
、H: o、io%以下。, H: o,io% or less.
Ni: 70.Q〜85.0%。Ni: 70. Q~85.0%.
Cr: 0.5−10.0%。Cr: 0.5-10.0%.
B:0.002〜0.020%。B: 0.002-0.020%.
を含有し、残部がFeおよび不可避的不純物よりなる熱
間加工性の優れたNi−Fe−Cr系高透8i率磁性合
金によって達成される。This is achieved by a Ni-Fe-Cr based high permeability 8i magnetic alloy with excellent hot workability, the balance being Fe and unavoidable impurities.
次に本発明においてNi−Fe−Cr系高透磁率磁性合
金の成分組成を限定した理由を以下に説明する。Next, the reason why the composition of the Ni-Fe-Cr based high permeability magnetic alloy is limited in the present invention will be explained below.
Cは、透磁率を低下させるので0.01%以下とした。Since C lowers magnetic permeability, it was set to 0.01% or less.
Slは、脱酸に必要であるが、2.0%を越えると透磁
率が低下するため好ましくないので、2.0%以下とし
た。Sl is necessary for deoxidation, but if it exceeds 2.0%, the magnetic permeability decreases, which is undesirable, so it is set to 2.0% or less.
、’!nは、脱酸効果、熱間加工性の改善に効果がある
。また磁気特性の焼鈍時の冷却速度に対する5受性を抑
制するために添加含有されるが、5.0%を威える含有
は飽和磁束密度および透Bi率が低下して実用的ではな
くなるため、5.0%以下とした。,'! n is effective in deoxidizing and improving hot workability. In addition, it is added to suppress the sensitivity of magnetic properties to the cooling rate during annealing, but if the content exceeds 5.0%, the saturation magnetic flux density and Bi permeability will decrease, making it impractical. It was set to 5.0% or less.
PおよびSは、熱間加工性を劣化させる元素であるので
それぞれP O,02%以下、 30.01%以下とし
た。Since P and S are elements that deteriorate hot workability, they were set to 0.02% or less and 30.01% or less, respectively.
A1は、脱酸に必要であるが、0.10%を越えると熱
間加工性を劣化させる元素であるので0.10%以下と
した。A1 is necessary for deoxidation, but since it is an element that deteriorates hot workability if it exceeds 0.10%, it was set to 0.10% or less.
Niは、70.0〜85.0%の範囲を外れると高透磁
率が得られないため、70.0〜85.0%に限定した
。Ni is limited to 70.0 to 85.0% because high magnetic permeability cannot be obtained outside the range of 70.0 to 85.0%.
Crは、0.5%未満では合金内の規則格子生成の抑制
効果がなくさらに磁気特性の改善効果も小さい。If Cr is less than 0.5%, it has no effect of suppressing the formation of a regular lattice in the alloy, and furthermore, the effect of improving magnetic properties is small.
また10.0%を越えると飽和磁束密度および透磁率が
低下するため0.5〜10.0%とした。Moreover, if it exceeds 10.0%, the saturation magnetic flux density and magnetic permeability will decrease, so it is set at 0.5 to 10.0%.
Bは、Ni−Fe−Cr系高透磁率磁性合金に適量添加
することにより、熱間圧延時の割れ疵がなくなり製造性
が改善されることを見出した本発明における最重要元素
の一つである。その適正量は0.002〜0.020%
の範囲であって0.002%未満では効果がなく、0.
020%を越す過剰の添加はホウ化物が析出し効果がな
くなるので0.002〜0.020%とした。B is one of the most important elements in the present invention, which has been found to eliminate cracks during hot rolling and improve manufacturability by adding an appropriate amount to a Ni-Fe-Cr based high permeability magnetic alloy. be. The appropriate amount is 0.002-0.020%
Within the range of 0.002%, there is no effect;
If added in excess of 0.020%, the boride will precipitate and the effect will be lost, so the amount was set at 0.002 to 0.020%.
(発明の具体的開示)
第1表に示す化学組成を有するNi−Fe−Cr系高透
磁率磁性合金を高周波真空溶解炉で溶製し、30kgの
鋼塊とした。溶製した鋼塊より試験片を切出し熱間加工
性を調査した。(Specific Disclosure of the Invention) A Ni-Fe-Cr based high permeability magnetic alloy having the chemical composition shown in Table 1 was melted in a high frequency vacuum melting furnace to form a 30 kg steel ingot. A test piece was cut from the melted steel ingot and its hot workability was investigated.
熱間加工性の評価試験として高温引張試験を行った。す
なわち直径10mの試験片を800〜1200’Cの引
張試験温度に加熱後、歪速度1 /seaで破断するま
で引張試験を行ない、断面収縮率を測定し熱間加工性の
評価をした。A high temperature tensile test was conducted as an evaluation test for hot workability. That is, after heating a test piece with a diameter of 10 m to a tensile test temperature of 800 to 1200'C, a tensile test was conducted at a strain rate of 1/sea until fracture, and the cross-sectional shrinkage rate was measured to evaluate hot workability.
第1図は熱間加工性とNi、 Cr含有量の関係を示す
ものであるが、この結果をみれば、Ni含有量71.2
%から84.1%、 Cr含有量0.9%から8.7%
までの合金が同じ傾向を示し、本発明で問題とする熱間
加工性に関する限り同−範躊に厘すると考えてよいこと
を示している。Figure 1 shows the relationship between hot workability and Ni and Cr contents.
% to 84.1%, Cr content 0.9% to 8.7%
The alloys shown above show the same tendency, indicating that they can be considered to be in the same category as far as hot workability is concerned in the present invention.
第2図、第3図は熱間加工性に対するBの影響を示すも
のである。これによるとBを0.003%含む試料Na
1−8では800℃における断面収縮率が70%を越
え、またさらにB含有量の多い試料Nα1−10(0,
007%B)、試料NQ 1−3 (0,015%B)
などでは800〜1200℃の全温度域にて、断面収縮
率が80%を越えている。しかしさらにB含有量の多い
試料Nα1−11(0,022%B)では逆に断面収縮
率が低下しBを添加しないものと同程度となっている。FIGS. 2 and 3 show the influence of B on hot workability. According to this, sample Na containing 0.003% B
1-8 has a cross-sectional shrinkage rate of over 70% at 800°C, and sample Nα1-10 (0,
007%B), sample NQ 1-3 (0,015%B)
etc., the cross-sectional shrinkage rate exceeds 80% in the entire temperature range of 800 to 1200°C. However, in sample Nα1-11 (0,022% B), which has an even higher B content, the cross-sectional shrinkage rate decreases to the same level as that in which B is not added.
したがって成分組成を限定したB O,002〜0.0
20%添加により断面収縮率が増大し、熱間加工性が良
好になることがわかる。Therefore, B O,002~0.0 with limited component composition
It can be seen that addition of 20% increases cross-sectional shrinkage and improves hot workability.
実施例
第1〜3図の結果から組成を限定した本発明合金と比較
合金とを、真空溶解により溶製した。本発明合金と比較
合金との組成を第2表に示す。得られた130mm厚み
の平型鋳塊を熱間圧延して4Iff11厚みの熱延板と
し、ざらに冷間圧延して板厚1.0mの冷延薄板とした
後、外径45m×内径33nnのJIS 2531規定
のリングに加工し試料とした。EXAMPLES Based on the results shown in FIGS. 1 to 3, the alloys of the present invention and comparative alloys whose compositions were limited were melted by vacuum melting. Table 2 shows the compositions of the invention alloy and comparative alloy. The obtained flat ingot with a thickness of 130 mm was hot-rolled into a hot-rolled plate with a thickness of 4Iff11, and then roughly cold-rolled into a cold-rolled thin plate with a thickness of 1.0m, which was then rolled into a sheet with an outer diameter of 45 m and an inner diameter of 33 nn. It was processed into a ring according to JIS 2531 and used as a sample.
上記試料を水素雰囲気中で1100℃×2時間の熱処理
を施し炉中冷却した場合の初送at率、最大透磁率を測
定した結果を、熱間圧延後の熱延板の外観状況とともに
第3表に示す、なお外観状況は熱延板の耳割れおよび表
面疵の有無により評価した。The above sample was heat treated at 1100℃ for 2 hours in a hydrogen atmosphere and cooled in a furnace. The appearance conditions shown in the table were evaluated based on the presence or absence of edge cracks and surface flaws in the hot rolled sheets.
第3表より、Bを本発明により限定した含有量を添加し
た場合には熱間圧延時に割れ疵のない良好な熱間圧延材
を得るとともに、磁気特性にも優れた素材を製造できる
ことが明らかとなった。From Table 3, it is clear that when B is added in a limited amount according to the present invention, it is possible to obtain a good hot-rolled material with no cracks during hot rolling, and also to produce a material with excellent magnetic properties. It became.
ヱージー人
4、
Ni−Fe−Cr系高透磁率磁性合金の磁気特性を損な
うことなく、熱間圧延時の割れ疵を防止することができ
たので、成品歩留を著しく向上させることが可能となっ
た。すなわちNi−Fe−Cr系高透磁率磁性合金を安
価に製造することができるようになった。We were able to prevent cracks during hot rolling without impairing the magnetic properties of the Ni-Fe-Cr based high permeability magnetic alloy, making it possible to significantly improve the product yield. became. That is, it has become possible to manufacture a Ni-Fe-Cr based high permeability magnetic alloy at low cost.
第1図はNi−Fe−Cr系高透磁率磁性合金のNi、
Cr含有量と引張試験温度、断面収縮率との関係を示す
図。
第2図、第3I2Iは、’J i −Fe −Cr系譜
透磁4I磁性合金にBを添加することによる引張試験温
度の断面収縮率との関係を示す図である。
(本発明の効果)
本発明は従来のNi−Fe−Cr系高透磁率磁性合金の
熱間加工性が著しく劣ることに鑑み、成分組成を限定し
、特にBを0.002〜0.020%添加することによ
り次の効果を得ることができた。Figure 1 shows Ni-Fe-Cr based high permeability magnetic alloy,
The figure which shows the relationship between Cr content, tensile test temperature, and cross-sectional shrinkage rate. FIGS. 2 and 3I2I are diagrams showing the relationship between the tensile test temperature and the cross-sectional shrinkage rate when B is added to the J i -Fe-Cr family permeable 4I magnetic alloy. (Effects of the present invention) In view of the fact that the hot workability of conventional Ni-Fe-Cr based high permeability magnetic alloys is extremely poor, the present invention limits the component composition, and in particular B is 0.002 to 0.020. % addition, the following effects could be obtained.
Claims (1)
間加工性の優れたNi−Fe−Cr系高透磁率磁性合金
。[Claims] C: 0.01% or less, Si: 2.0% or less, Mn: 5.0% or less, P: 0.02% or less, S: 0.01% or less, Al: 0. Contains 10% or less, Ni: 70.0 to 85.0%, Cr: 0.5 to 10.0%, B: 0.002 to 0.020%, with the remainder consisting of Fe and inevitable impurities. A Ni-Fe-Cr based high permeability magnetic alloy with excellent hot workability.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20828288A JPH0261027A (en) | 1988-08-24 | 1988-08-24 | Ni-fe-cr high permeability magnetic alloy having excellent hot workability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20828288A JPH0261027A (en) | 1988-08-24 | 1988-08-24 | Ni-fe-cr high permeability magnetic alloy having excellent hot workability |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0261027A true JPH0261027A (en) | 1990-03-01 |
Family
ID=16553661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20828288A Pending JPH0261027A (en) | 1988-08-24 | 1988-08-24 | Ni-fe-cr high permeability magnetic alloy having excellent hot workability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0261027A (en) |
-
1988
- 1988-08-24 JP JP20828288A patent/JPH0261027A/en active Pending
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