US2025312848A1PendingUtilityA1
Sintered member and method for producing sintered member
Assignee: SUMITOMO ELECTRIC INDUSTRIESPriority: Apr 25, 2022Filed: Apr 24, 2023Published: Oct 9, 2025
Est. expiryApr 25, 2042(~15.8 yrs left)· nominal 20-yr term from priority
B22F 2998/10B22F 2301/35B22F 3/16B22F 5/10C22C 33/0285B22F 3/02B22F 3/10
58
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Claims
Abstract
A sintered member composed of a metal, wherein the sintered member has a relative density of 95% or more and has at least one of a hole for which the diameter x 1 and depth y 1 satisfy specific requirements and a groove for which the width x 2 and depth y 2 satisfy specific requirements.
Claims
exact text as granted — not AI-modified1 .- 5 . (canceled)
6 . A sintered member composed of a metal,
wherein the sintered member has a relative density of 95% or more, wherein the sintered member has a hole having a diameter x 1 (mm) and a depth y 1 (mm), the diameter x 1 and the depth y 1 satisfying requirements (a1) to (a7) below:
(
a
1
)
when
0.05
≤
x
1
<
0.08
,
y
1
>
2.67
x
1
+
0.217
;
(
a
2
)
when
0.08
≤
x
1
<
0.1
,
y
1
>
28.5
x
1
-
1.85
;
(
a
3
)
when
0.1
≤
x
1
<
0.3
,
y
1
>
10
x
1
;
(
a
4
)
when
0.3
≤
x
1
<
0.8
,
y
1
>
8
x
1
+
0.6
;
(
a
5
)
when
0.8
≤
x
1
<
1.5
,
y
1
>
32.9
x
1
-
19.3
;
(
a
6
)
when
1.5
≤
x
1
<
2.0
,
y
1
>
20
x
1
;
and
(
a
7
)
when
2.0
≤
x
1
,
y
1
>
10
x
1
+
20.
7 . A sintered member composed of a metal,
wherein the sintered member has a relative density of 95% or more, wherein the sintered member has a groove having a width x 2 (mm) and a depth y 2 (mm), the width x 2 and the depth y 2 satisfying requirements (b1) to (b3) below;
(
b
1
)
w
hen
0.05
≤
x
2
<
0.2
,
y
2
>
5
x
2
+
0.4
;
(
b
2
)
w
hen
0.2
≤
x
2
<
0.5
,
y
2
>
28.7
x
2
-
4.3
;
and
(
b
3
)
w
hen
0.5
≤
x
2
,
y
2
>
6
x
2
+
7.
8 . The sintered member according to claim 6 , wherein the metal is pure iron or an iron alloy.
9 . The sintered member according to claim 6 , wherein the metal is stainless steel.
10 . The sintered member according to claim 6 , wherein the relative density is 97% or more.
11 . The sintered member according to claim 7 , wherein the metal is pure iron or an iron alloy.
12 . The sintered member according to claim 7 , wherein the metal is stainless steel.
13 . The sintered member according to claim 7 , wherein the relative density is 97% or more.
14 . A method of manufacturing a sintered member, the method comprising:
preparing a raw material powder containing a metal powder and a lubricant; pressing the raw material powder to produce a green compact having a relative density of 95% or more; subjecting the green compact to hole drilling to produce a workpiece having a hole having a diameter x 1 (mm) and a depth y 1 (mm), the diameter x 1 and the depth y 1 satisfying requirements (a1) to (a7) below; and sintering the workpiece, wherein the ratio of the lubricant contained in the raw material powder is 0.025% by mass to 0.2% by mass, and wherein the lubricant has a melting point of 150° C. or lower:
(
a
1
)
when
0.05
≤
x
1
<
0.08
,
y
1
>
2.67
x
1
+
0.217
;
(
a
2
)
when
0.08
≤
x
1
<
0.1
,
y
1
>
28.5
x
1
-
1.85
;
(
a
3
)
when
0.1
≤
x
1
<
0.3
,
y
1
>
10
x
1
;
(
a
4
)
when
0.3
≤
x
1
<
0.8
,
y
1
>
8
x
1
+
0.6
;
(
a
5
)
when
0.8
≤
x
1
<
1.5
,
y
1
>
32.9
x
1
-
19.3
;
(
a
6
)
when
1.5
≤
x
1
<
2.0
,
y
1
>
20
x
1
;
and
(
a
7
)
when
2.0
≤
x
1
,
y
1
>
10
x
1
+
20.
15 . A method of manufacturing a sintered member, the method comprising:
preparing a raw material powder containing a metal powder and a lubricant; pressing the raw material powder to produce a green compact having a relative density of 95% or more; subjecting the green compact to grooving to produce a workpiece having a groove having a width x 2 (mm) and a depth y 2 (mm), the width x 2 and the depth y 2 satisfying requirements (b1) to (b3) below; and sintering the workpiece, wherein the ratio of the lubricant contained in the raw material powder is 0.025% by mass to 0.2% by mass, and wherein the lubricant has a melting point of 150° C. or lower:
(
b
1
)
w
hen
0.05
≤
x
2
<
0.2
,
y
2
>
5
x
2
+
0.4
;
(
b
2
)
w
hen
0.2
≤
x
2
<
0.5
,
y
2
>
28.7
x
2
-
4.3
;
and
(
b
3
)
w
hen
0.5
≤
x
2
,
y
2
>
6
x
2
+
7.
16 . The method of manufacturing a sintered member according to claim 14 , wherein the hole drilling is step feed drilling.
17 . The method of manufacturing a sintered member according to claim 14 , wherein the lubricant is stearic acid, erucic acid amide, or stearic acid amide.
18 . The method of manufacturing a sintered member according to claim 15 , wherein the lubricant is stearic acid, erucic acid amide, or stearic acid amide.Join the waitlist — get patent alerts
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