JPS599141A - Electrically conductive high-strength copper alloy with softening resistance - Google Patents

Abstract

PURPOSE:To provide a Cu alloy consisting of prescribed percentages of Ni, Fe, Sn, P and B and the balance Cu with inevitable impurities and having high softening resistance, electric conductivity, platebility, solderability, mechanical strength, etc. CONSTITUTION:This electrically conductive high-strength Cu alloy with softening resistance consists of, by weight, 0.05-0.40% Ni, 0.05-0.40% Fe, 0.05-0.20% Sn, 0.05-0.10% P, 0.005-0.050% B and the balance Cu with inevitable impurities. The Cu alloy has high softening resistance, electric conductivity, heat conductivity, platability, solderability, mechanical strength, etc. Accordingly, the Cu alloy is suitable for use as the material of electric and electronic parts requiring said characteristics, the material of the fins of a heat exchanger, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to electrical and electronic components and heat exchangers that require properties such as softening resistance, conductivity, plating properties, and mechanical strength. The present invention relates to a copper alloy suitable for various purposes.

Conventionally, phosphorus-deoxidized steel and soot-filled copper have been used for lead materials for semiconductor devices and fin materials for heat exchangers such as Cerageta, and they have good electrical conductivity, heat conductivity, plating properties, and...
/Although it has sagging properties, it has insufficient softening resistance and mechanical strength, and is subject to manufacturing and usage restrictions. In particular, when used for electricity, etc., there is a problem when used in places with high power consumption, more specifically, when used in lead frames of output ICs, power tractors/rasters, etc.

In view of these points, the present invention has completely improved the drawbacks of conventional copper-based alloys such as phosphorus deoxidized steel and copper-filled copper, and has good softening resistance suitable for fin phase of electrical and electronic parts and heat exchangers. The present invention provides a high-strength copper alloy for conductive use.

The present invention is based on the old; 0.05-0.40 weight'lx,
Fe; 0.05 to 0.4 [J weight%, Sr+
; 0.05-0.20% by weight l PIO905-0
．． 10 weight ratio, B; 0.005 to 0.050 weight ratio.

The balance is copper and unavoidable impurities, making it a copper-based alloy with good softening resistance, electrical conductivity, heat conductivity, plating properties, dieability, and mechanical strength.

Next, the reasons for adding the alloy components constituting the alloy of the present invention and the reasons for their limitations will be fully explained.

N1FJ is an element that improves mechanical strength, softening resistance, and corrosion resistance, but if the N1 content is less than 0.05% by weight, strength and softening resistance cannot be obtained, and the reverse VcNi precipitation rate is 0.05% by weight.
40 width: If the amount exceeds 6%, the number of leads will decrease by 1'.

The effect of refining grains on Fe is Zhuquan 1, et al., 17.
t + Ii, P, P etc. 44] 17 The action of the exchange base tl12, the use of the Vrl microT (l this dispersion (-te 111II softening 1'1-Ogami()) and the electric rate can be increased in the direction of fPe ';';;Aritsuri is lJ, 05 less than Ichikawa%-
Ciq↓ plane 1110, fl-1 cow, mechanical strength 11j is low leading [4', 4 low. F(' *h total power L1.4iJ
In Kegawa-kake-1, the softness was good, but the conductivity and processability were poor. To explain this based on the test eyelids in all drawings, Figure 1 (r, J, O, T6 section 1
゛Ii, [LO8%S11 +0.07 section P, [
J, 018 Section) 3 remaining 011 training camp tc'b and 11
゛(・Electrical conductivity when the ratio is unchanged and the ratio is ζ (ratio LACS)
The hill is 1k), but Fe staff is U, 05~0.4
[Between 11% and 11%, there is a peak with C1 injury 1 shift.
C) 1<C1-1-U according to culm diagram I investigated the relationship 1 system between the relationship and the +fliI heat j crystal.
1+1'i"J:su1ll11'"! , (+a I ship's strong VC increase L, 0.4% 1:1 near leverage) (7 do is saturated or decreased around 1. 1-ζ Dogawa/Haru.;
1j, 3, and 3 are shown in more detail for the yarn in Figure 2, so the relationship between heating temperature and hardness IW is fully shown. ￥6As seen in the figure, VC, Fe is not present ≦ addition (NI
130), F) Additive-free (NQ13), Fe O, Ui
% (Nα551FC ratio ＼, F(l total suitability＠Rinka 1) The softening temperature is 1, and 1f in Figure 6 F.
14nSnO,i%.

+30.0L15%, balance Cu comparison [911].

Sn hardens into the copper matrix structure and increases the softening temperature +it.

If the S II content sensitivity is less than 0.05 thousand states, it is impossible to strengthen the base group 1 moth, and if the strength is less than 1120 weight factors - J, Z
There is a conductive i (, i, white decreases 1" rat, deoxidizing effect has full effect, III softens t towards -1 di) [, element-C. P content is 1. (1
When the weight ratio is less than 5, the improvement in mechanical strength and 111il softening property is significant (See Figures 2 and 3 with 1(j)-r,'!l:
In addition, it forms a compound with other additive θ['' elements, 10JLc-)
The effect of dispersing and precipitating it into the base is insufficient, and the conductivity also decreases (see Figure 1).

■゛Iris - Ariharu is 0. After +0 tonne, the lead 1b becomes weaker.

B iJ, strong deoxidizing effect and crystal grain O'11. It is an element that has the effect of reducing grain size and preventing grain size from becoming large. If the B content is less than 0.005 ton, the effect of adding VC,l:
[Na] Ju ribs are saturated.

J6 test 1 series ■ 1 Table shows - is the alloy of Seiju group 1 戊 high solid wave nine? Melt IW L in the melting furnace, 40 (+137 X 1
50 (length) x 40 (Jf4) (7'>i:/
Kono hVC casting 1-1ζ. Hot rolled at 800 U,
A plate with a thickness of 8 mm was prepared, and after the sheet metal curve was completely pickled, cold rolling, annealing, and pickling were repeated to obtain one roll with a thickness of 62 mm. . Then, 500C11
After time annealing and pickling, it was cold rolled into a plate with a thickness of 0.5 mm. In this way, VC was used to adjust the fins.As an evaluation of this trial O1, the strength was determined by the tensile test, when the hardness after heating for 7 minutes with 1 hit of bending and bending was 8U% of the hardness after pressure kIL. IW, electrical conductivity and thermal conductivity are electrical conductivity (coupling [ΔC8),
Handa published one line for the d/da spread test method.The results are shown in Table 1.

・As shown in Table 1, the alloy of the present invention V't: 1-J
-<Re1ζJ Softening 11. and 1-min mechanical strength,
It is suitable for use in streetcars and electronic devices, where high reliability is required, especially for lead frames.

The alloy of the present invention can be melted, hot rolled at 1f, cold IE rolled and intermediate treated at t! I! The sweat is quite easy, and there is no technical difficulty in the sword\tsu1ζ.
From 1>, it can be placed as a memorial service.

[Brief explanation of the drawing]

Figure 1 shows the relationship between the tFe ratio and the conductivity (1.ACS), Figure 1' shows the relationship between the tFe ratio and the heat suppression temperature, and Figure 5 shows the relationship between the heating temperature and the hardness (1. Relationship with Hv l Diagram 1. Kimi 4 Diagram - G1 to 6 Diagrams, 5 inches] 71 Creation of Diagram 11 -"C・(%) [Song 1 ■ "2] - ('+ゝ) Ii non 1 \! 1 ri) ↓ Mouth I (1-1゛, solid θmu jiri) monk re-injun 1 ↓ prisoner IFjFIII) (59+#>, 34tV
,・+> 2 [1 mountain) ↓ ■-giant n (61] II ”(So)) I) ↓ [10,000 g-(nll % +1.::shu)” ↓ [■2■? η
1JII 111↓ [Medical Asia\N] Isai 1111 ↓ ``I■1■ (41,61lJH ↓ [EE 7jOyafu[■]''(c)lli+ ''(',
x i tl+↓ Low mouth (16 N 11.67 l) ↓ Ro Seiko I low (``,nll O+Mountain 11↓ [1 stroke Colo ([1,62 N (1, J l・Figure 4 59 time 〜Vl〉, 69 mountains), 151'lt/ nun+
)6 []%) %If2:i (1, 1.) 1, li ime) []da t・il,! :'su47(9,'j: ]6LI
%) Item 11. (1 line Shio) 1111・46140 (Ji Ot I + Ll + i I () J11 Toy: 2 (]%) ゛11 mezi+n・11.511+. 2 and ) + □ (10,000 so; shi 1 mountain city 1'4' (spontaneous) 1 de / 1 director's own Kazuo Wakasugi Tono. 135
No. 2 Title of the invention Softening resistance 1 High strength copper alloy for electrical conductivity 3
71 Ro stop vehicle (Relationship with II Patent application) (Representative Nishi ('4 Taka4 Agent 〒162 6 Ura City Contents 1) Detailed explanation of the invention as described above. 1.
4selfffl 5th line 11th line for details ',' o, oz%P
jkIJ' Corrected to 0.05% 1゛''. ("Re-specification, page 4, line 6 (" (NIL 30)
, No addition of P (sn 33 ) -1 as ``(Nn5), No addition of P ++ (Na7) j +c Supplement 1 [Size. (Nα35)1 is corrected by U'(Nα6)JlK.
9. IK supplementary IF first. 6+) In Table 1 on page 6 of the specification, [soo, J in the column of Nα1 in the softening temperature column was corrected to 5osj, and sweet Na 4
Correct it to 155θ of the stage of 11-6+o. ) Attach the drawings (Fig. 1, Fig. 2, Fig. S, Fig. 4) τ1
Corrected as shown in the drawing.

Claims (1)

[Claims] Ni; 0.05-0.40% by weight, F'e;
0.05-0.40% by weight, Sr] -〇, 05
~0.20 @total%, l'; [J, 05~0.
IU market weight, Fl; 0.005 to 0.050 heavy weight, the balance being copper and unavoidable impurities. High-strength copper alloy for soft conductivity (arsenic conductivity).