Resistor and manufacturing method thereof
AssigneeDaido Steel Co., Ltd.
InventorsRyoga Soeda, Yuki Nakamura, Hiroyuki Miyamoto
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Abstract
The present invention relates to a resistor including a Ni-based alloy that consists of 15.0 mass %≤Cr≤25.0 mass %, 1.0 mass %≤Al≤4.0 mass %, 1.0 mass %≤Cu≤3.0 mass %, 0 mass %≤Si≤1.5 mass %, and 0 mass %≤Mn≤1.5 mass %, with the balance being Ni and inevitable impurities, in which the resistor has a Vickers hardness at 20° C. of 160 Hv or more and 230 Hv or less, a volume resistivity at 20° C. of 125 μΩ·cm or more and 150 μΩ·cm or less, and a temperature coefficient of resistance at 20° C. to 155° C. of −50 ppm/° C. or more and 10 ppm/° C. or less, and relates to a manufacturing method thereof.
Claims17
A resistor comprising a Ni-based alloy that consists of
- 15.
- mass
-
- %
- ≤
- Cr
- ≤
- 25.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Al
- ≤
- 4.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Cu
- ≤
- 3.
- mass
-
- %
- ,
- 0
-
- mass
-
- %
- ≤
- Si
- ≤
- 1.5
- mass
-
- %
- ,
- and
- 0
-
- mass
-
- %
- ≤
- Mn
- ≤
- 1.5
- mass
-
- %
- ,
- with the balance being Ni and inevitable impurities,
- wherein the resistor has
- a Vickers hardness at 20° C. of 160 Hv or more and 230 Hv or less,
- a volume resistivity at 20° C. of 125μΩ·cm or more and 150μΩ·cm or less, and
- a temperature coefficient of resistance at 20° C. to 155° C. of −50 ppm/° C. or more and less than −10 ppm/° C.
A manufacturing method of a resistor comprising a Ni-based alloy that consists of:
- 15.
- mass
-
- %
- ≤
- Cr
- ≤
- 25.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Al
- ≤
- 4.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Cu
- ≤
- 3.
- mass
-
- %
- ,
- 0
-
- mass
-
- %
- ≤
- Si
- ≤
- 1.5
- mass
-
- %
- ,
- and
- 0
-
- mass
-
- %
- ≤
- Mn
- ≤
- 1.5
- mass
-
- %
- ,
- with the balance being Ni and inevitable impurities,
- wherein the resistor has:
- a Vickers hardness at 20° C. of 160 Hv or more and 230 Hv or less,
- a volume resistivity at 20° C. of 125μΩ·cm or more and 150μΩ·cm or less, and
- a temperature coefficient of resistance at 20° C. to 155° C. of −50 ppm/° C. or more and 10 ppm/° C. or less, the method comprising:
- a melting and casting step of melting and casting raw materials to obtain an ingot consisting of
- 15.
- mass
-
- %
- ≤
- Cr
- ≤
- 25.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Al
- ≤
- 4.
- mass
-
- %
- ,
- 1.
- mass
-
- %
- ≤
- Cu
- ≤
- 3.
- mass
-
- %
- ,
- 0
-
- mass
-
- %
- ≤
- Si
- ≤
- 1.5
- mass
-
- %
- ,
- and
- 0
-
- mass
-
- %
- ≤
- Mn
- ≤
- 1.5
- mass
-
- %
- ,
- with the balance being Ni and inevitable impurities;
- a homogenization heat treatment step of performing a homogenization heat treatment on the ingot to obtain a heat-treated body;
- a hot working step of performing hot working on the heat-treated body to obtain a hot-formed body;
- a cold working step of performing cold working on the hot-formed body to obtain a cold-formed body;
- and
- a heat treatment step of performing a heat treatment for removing strain and controlling a precipitation amount of a γ′ phase and a formation amount of a short-range ordered phase on the cold-formed body, to obtain the resistor.
Dependencies are inferred from the claim text.