JPS6024339A - Permanent magnet alloy - Google Patents

Abstract

PURPOSE:To obtain a very useful novel permanent magnet having further improved characteristics by adding Mn and Al to a conventional permanent magnet alloy. CONSTITUTION:This permanent magnet alloy has a composition represented by the formula, wherein R is one or more kinds of rare earth elements, M is one or more among Zr, Hf, Ti, Nb, Ta and Si, and 0.01<=x<=0.7, 0.001<=y<=0.25, 0.001<=z <=0.15, 0.01<=alpha<=0.3, 0.01<=beta<=0.4, and 5<=A<=12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermetallic compound consisting of a rare earth metal and CO, particularly to the improvement of a Cu-added R2'C0cr permanent magnet alloy with a low rare earth component. 3m.

A rare earth element (hereinafter referred to as R) consisting of one type or a combination of two or more rare earth elements centered on Ce, co,
R(Go 4-X-y
-Z F e4 qu, M7')A (where M:Z
r, 1f, Ti, Nb, Ta, Si, Mo, V
species or combination of two or more species, 0501≦×≦0.40.0
．． 02≦y≦0.25, 0.001≦2≦0.15
.

6.5≦A≦8.3), the permanent magnetic alloy has a residual magnetic flux density (j3r), a coercive force (zhlc, B+-1
c') is known as an excellent permanent magnet material.

(For example, JP-A No. 53-8662G, JP-A No. 51-Sho.
4729G.

JP-A-53-106326) The above alloy already has an energy peak (' (Bl-l) max) reaching as much as 30M G Oe and a
KOe's l-IC is set to 1. However, /1・, +−+r, r+.

Even if additives such as Nb, Ta, Si, MO, V, etc. are used, high F'e is necessary to further increase Br.

There was a limit to lowering Cu.

,? I'nawara r e ff1A = 0.3. Cu
fa B = 0.05 is the limit H, and A > 0
．． 3. In the composition range of B < 0.0!1, good magnetic properties could not be obtained even if the amount of additives was increased.

It is an object of the present invention to improve the above-mentioned drawbacks of the prior art and to provide a novel permanent magnet that has excellent characteristics and is extremely useful.

In order to achieve the above object, the present invention mainly focuses on Mn.

It is characterized in that Feff1 is increased by adding A1.

As a result of various experiments, the inventors found that by newly adding Mn and AI as alloying elements, the F required for increasing the temperature to 81.
It has been found that it is possible to increase ew. That is, Mn
It was found that sufficient zHc for a permanent magnet can be obtained even if Feff1 is increased by adding AI.

By adding Mn and AI, generally one cucumber, B
Although r decreases, it is important for ensuring IHC. The coercive force of the CU-substituted R2GO bamboo magnet is explained by the binding of the domain wall by precipitates, and in the prior art, Fe
As l increases, the shape, size, and composition of the precipitates change,
A sufficient bottle stop could not be achieved. However, Mn according to the present invention.

By adding A1, the concentration of Mn in the precipitates increases, and even in the high Feff1 composition region, the concentration of Mn in the precipitates increases.
is obtained.

In the present invention, if the addition of Mn is less than 0.01, the amount of Fe cannot be increased, and if it exceeds 0.3, the Curie point decreases and the 3r decreases significantly, which is not preferable as a permanent magnet material. Further, if the addition of A1 is less than 0.01, the amount of Fe cannot be increased, and if it is more than 0.4, the Curie point decreases and the I3r decreases significantly. Therefore, the amounts of A1 and Mn are determined by the balance with Fee, and in the case of a high Fe suspension composition, the amounts of A1 and Mn tend to increase. 2r, 1-If, Ti, Nb, Ta represented by M
, Si, or a combination of two or more types, if the amount added is less than o, ooi, sufficient stopping lc will not be obtained;
15, but it causes a decrease in zl-1c. In particular, when Mn and AI according to the present invention are used, coercive force decreases little even if Feff1, which is useful for increasing 3r, is increased, so Fefl can be increased more than when Mn and AI are not used. "If the zero displacement is less than 0.01, it will have little effect on increasing [3r, and if it is more than 0.7, it will cause a decrease in coercive force. If Cuff1 is less than 0.001, the Mn according to the present invention, Even if AI is used, sufficient coercive force cannot be obtained.B if CUt exceeds 0.25.

The present invention cannot be utilized as a result.

If the value of A is 5 or less, the value of [3r] decreases and the present invention cannot be utilized. If it is 12 or more, a decrease in l-I C is observed and it is not preferable as a permanent magnet material.

The present invention will be explained below with reference to Examples.

Example 1 S m , (CohoIF eo, 40M no, og
, A Io4o Cuo, oss P, a7Zrθ, 0
．． ) 7 was melted by high frequency, coarsely pulverized using a Shaw crusher and a Brown mill, and then finely pulverized using a jet mill. The grinding media is N2 gas and the fine powder particle size is 40 μm. This pulverized powder was oriented in 30 KOe magnetic powder and compression molded using a hydrostatic press at a pressure of 2 tOn/Cm2. The obtained molded body was heated at 1150°C for 2
Sintered in vacuum for an hour. After sintering, it was solution-treated at 1120°C for 1 hour, and then rapidly cooled in water. It was further aged at 800°C for 2 hours and cooled to 200°C at a cooling rate of 1°C/min.

The obtained magnetic properties are B r ~ 10330G BHC~70000° s@C~76000e (BH>max~25.9MGOe.

Example 2 S mOJ Pro, 5''' (C0baJL F
e6. ．． 3(,M I),)1,7A+,,09C
An alloy u6,0.5Sio,ol Hf(,,01)7 was melted, crushed, and molded in the same manner as in Example 1. The obtained molded body was sintered in water at 1150°C for 2 hours. After sintering, it was solution-treated at 1120°C for 1 hour and rapidly cooled in water.

It was further aged at 780°C for 2 hours and aged at 1°C7'min.
It was cooled to 200°C at a cooling rate of . The obtained magnetic properties were B r ~11500G Bll C□''79000e zHC ~85000a (3 Tor) max ~31', and 8M G Oe.

Example 3 N d (c obni F eo, q M 11o,
o Otsu A 16.07 CU6,6g S p), ol
Hf O,Q/ )7. ) was melted, crushed, and sintered in the same manner as in Example 1. After sintering, solution treatment was performed at 1100°C for 2 hours. 2 after heating at 800°C for 1 hour
It was cooled to 500° C. in a magnetic field of 0,000 s. The cooling rate is 1°C/min. At 500°C, the application of the magnetic field was stopped, and further aging was performed at 500°C for 2 hours + 400°C for 5 hours.

Note that the direction of application of the magnetic field is the same as the direction of orientation in the magnetic field performed previously. The obtained magnetic properties are B r ~11'
900G 8I-IC-81000゜engineering HO~125000e (B H) max ~34. It was IM GO8.

Example 4 An alloy having the composition shown in Table 1 was melted, crushed, sintered, and heat treated in the same manner as in Example 2. Obtained Table 1 Table 2 Procedural Amendment Case 1982 Patent Application No. 131196 @ Title of Invention Permanent Magnet Alloy Compensator Case Relationship Patent Applicant Address 2-1-2 Marunouchi, Chiyoda-ku, Tokyo Issue name (5
08) "Detailed description of the invention" column of Hitachi Metals Co., Ltd. Mei ■ 1 book.

1. Indication of "underwater sintering" on page 6, line 9 of the details box of the amendment. 1. Indication of the case of the Commissioner of the Hydrogen Patent Office. 1981. Special petition No. 131196. Name of the invention. Relationship with the case of the person who removed the permanent magnet alloy amendment. Patent applicant - Address 2-1-25:3 Marunouchi, Chiyoda-ku, Tokyo Name
(508) Hitachi Metals Co., Ltd. Representative Nori Kono Husband Agent Residence 2-1-2 Marunouchi, Chiyoda-ku, Tokyo 11-3'
/Metal Co., Ltd. 1, page 2, line 10 of the specification, "obtained. However,""obtained, but Br is the maximum value of 11000G'/J<a. Therefore, it is corrected to J.

2. In the 12th line of the same page of the same book, ``Momore'' is corrected to ``Momore''.

3. On the same page of the same book, ``To measure'' is corrected to ``Although attempts have been made to measure.''

4. Correct the following lines 14 to 17 on the same page.

1-Li'41 FO amount 0.3. CLI whistle 0.0! i
is the critical amount, X > 0.3.1/ < 0.05
In the composition range J, j, even if the amount of additives was increased, good characteristics could not be obtained. 5. Lines 18-20 of the same page for the same town are corrected as follows.

rThe present invention extends to the composition range that was conventionally considered to be the limit (,
1" four I3 high Fc, low Cu composition further Br
, (Bl-1)max, and to provide a new and useful permanent magnet. ” 6. Correct the following lines 1-3 of box 3 of the same book.

By roughly adding ~1n and AI to the system, J milli "Cm"
By realizing an increase in magnetic Q'J M,, finally Br, (B
l-1) It is characterized by improving max. .

7. Same book, page 10-12, F Mll, A l
Town - important. J is ``~1n, addition of AI~)
It is well known that BL generally decreases by one point. However, it was found to be important for securing r l-1c. Correct to J.

8. Insert the following sentence between lines 4 and 5 on page 6 of the same book.

"1 old, 7, S n+ (Cab, IF eo, 4o(
', uo, o5S io, 01 ``0,0/ )y alloy was evaluated and the following magnetic properties were obtained I(.

[3r ~11500G a Hc --3000e r l-l c ~ 5000e (B H)' max ・"1.1t'vI G 0
By adding eAI' and Mll, high r t'q and high (B l-1>
I know I'll be happy about max's 1!11. J 9. Insert the following sentence between lines 17 and 18 on the same page.

r Same mouth 4 S Ill. ,,Pr. ,5. (Cob,
F co, 35 G"6.05.S '0.07H
An alloy with ro, o, >7 was evaluated and the following magnetic properties were determined in 1-1].

131゛ - ~ 11200G aI-1c ~ 4000e Ihlc・-fioOQ6 (B t-l) 1IlaX ~ 1.3 M13
QeJlo, page 7 of the same book, insert the following sentence between lines 12 and 13.

1 Simultaneously tree d(CO-r c.,, /5Cuo,oy
An alloy named S'o,, 11/l-1%, ot) 72 was evaluated, and the following magnetic properties were determined.

1:3 r ~114 (1(IG s Hc '= 1000e r l-l c ~150Q6 (B H) n1ax +HO,,7M G Oe j
that's all

Claims (1)

[Claims] R(CO1-X-"J-Z-d-/j l2 eg C
Uy, tvl'z M n, 7AI,)A (where R
: One type or combination of two or more rare earth elements, M:Z
r, l-1f, Ti, Nb. One or more combinations of Ta and Si, 0.01
≦X≦0.7. 0.001≦y≦0.25, 0.
001≦7≦0. t5, 0.01≦α≦0.3.
A permanent magnet alloy having a composition of 0.01≦β≦0.4, 5≦A≦12).