# US 5,348,701 A · Vibration-damping alloy

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- Number: US 5,348,701 A
- Document ID: US5348701A
- Status: Granted
- Kind: A
- Application number: 07/847,058
- Filed: 1992-04-02
- Granted: 1994-09-20
- Earliest claimed: 1990-08-04
- Assignees: NKK Corporation
- Inventors: Takayuki Ohdake; Toshimichi Ohmori; Toshihiro Takamura; Takemi Yamada; Tetsuya Sampei
- Web page: https://patentgrep.com/patent/US5348701A

## CPC

- C22C 38/06: containing aluminium
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

It is an object to provide a vibration-damping alloy which has a high power of damping vibration and can be used to make components of a structure, machine, etc. and reduce effectively any vibration thereof and the noise thereby produced. The vibration-damping alloy of this invention contains those proportions of Al and Si which fall within the range defined by a series of points in any of FIGS. 1 to 6, and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities. It preferably contains more than 0.5 wt. % Si, while not containing more than 0.01 wt. % of any of C, N, O, P and S.

## Claims

### Claim 1

A vibration-damping alloy containing not more than 0.01 wt. % C, not more than 0.01 wt. % N, not more than 0.01 wt. % O, not more than 0.01 wt. % P, not more than 0.01 wt. % S, those proportions of Al and Si which fall within the range defined in FIG. 3 by the lines connecting points A.sub.8 (Al: 6.30 wt. %; Si: 0 wt. %), B.sub.8 (Al: 6.30 wt. %; Si: 0.50 wt. %), C.sub.8 (Al: 2.75 wt. %; Si: 1.20 wt. %), D.sub.8 (Al: 0 wt. %; Si: 3.50 wt. %), E.sub.8 (Al: 0 wt. %; Si: 0.60 wt. %), and F.sub.8 (Al: 0.70 wt. %; Si: 0 wt. %), and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities.

### Claim 2

A vibration-damping alloy containing not more than 0.01 wt. % C, not more than 0.01 wt. % N, not more than 0.01 wt. % O, not more than 0.01 wt. % p, not more than 0.01 wt. % S, those proportions of Al and Si which fall within the range defined in FIG. 4 by the lines connecting points A.sub.10 (Al: 4.80 wt. %; Si: 0 wt. %), B.sub.10 (Al: 4.80 wt. %; Si: 0.70 wt. %), C.sub.10 (Al: 2.90 wt. %: Si: 1.00 wt. %), D.sub.10 (Al: 1.35 wt. %; Si: 2.05 wt. %), E.sub.10 (Al: 0.55 wt. %; Si: 2.00 wt. %), F.sub.10 (Al: 0 wt. %; Si: 2.40 wt. %), G.sub.10 (Al: 0 wt. %; Si: 0.80 wt. %), H.sub.10 (Al: 0.55 wt. %; Si: 0.25 wt. %), I.sub.10 (Al: 1.60 wt. %; Si: 0.35 wt. %) and J.sub.10 (Al: 2.25 wt. %; Si: 0 wt. %), and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities.

### Claim 3

A vibration-damping alloy containing not more than 0.01 wt. % C, not more than 0.01 wt. % N, not more than 0.01 wt. % O, not more than 0.01 wt. % P, not more that 0.01 wt. % S, those proportions of Al and Si which fall within the range defined in FIG. 5 by the lines connecting points A.sub.12 (Al: 4.55 wt. %; Si: 0.10 wt. %), B.sub.12 (Al: 4.55 wt. %; Si: 0.60 wt. %), C.sub.12 (Al: 2.35 wt. %; Si: 1.00 wt. %), D.sub.12 (Al: 1.10 wt. %; Si: 1.95 wt. %), E.sub.12 (Al: 1.10 wt. %; Si: 1.35 wt. %) and F.sub.12 (Al: 2.40 wt. %; Si: 0.10 wt. %), or points G.sub.12 (Al: 0 wt. %; Si: 1.05 wt. %), H.sub.12 (Al: 0.60 wt. %; Si: 0.35 wt. %), I.sub.12 (Al: 0.90 wt. %; Si: 0.40 wt. %), J.sub.12 (Al: 0.30 wt. %; Si: 2.05 wt. %) and K.sub.12 (Al: 0 wt. %; Si: 2.30 wt. %), and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities.

### Claim 4

A vibration-damping alloy containing not more than 0.01 wt. % C, not more than 0.01 wt. % N, not more than 0.01 wt. % O, not more than 0.01 wt. % P, not more than 0.01 wt. % S, those proportions of Al and Si which fall within the range defined in FIG. 6 by the lines connecting points A.sub.14 (Al: 4.15 wt. %; Si: 0.20 wt. %), B.sub.14 (Al: 4.15 wt. %; Si: 0.60 wt. %), C.sub.14 (Al: 2.30 wt. %; Si: 0.90 wt. %), D.sub.14 (Al: 1.20 wt %; Si: 1.75 wt %), E.sub.14 (Al: 1.20 wt %; Si: 1.35 wt %) and F.sub.14 (Al: 2.70 wt. %; Si: 0.20 wt. %), or points G.sub.14 (Al: 0 wt. %; Si: 1.15 wt. %), H.sub.14 (Al: 0.60 wt. %: Si: 0.40 wt. %), I.sub.14 (Al: 0.80 wt. %; Si: 0.45 wt. %), J.sub.14 (Al: 0 wt. %; Si: 2.20 wt %), and less than 0.1 wt. % Mn, the balance of its composition being Fe and unavoidable impurities.

### Claim 5 (depends on 1, 2, 3)

A vibration-damping alloy as set forth in claim 1, 2, 3, or 4, wherein said proportion of Si is more than 0.5 wt. %.