# US 5,330,706 A · Vibration-damping alloy of high strength

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- Number: US 5,330,706 A
- Document ID: US5330706A
- Status: Granted
- Kind: A
- Application number: 07/847,057
- Filed: 1992-04-02
- Granted: 1994-07-19
- 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/US5330706A

## CPC

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

## Abstract

It is an object to provide a vibration-damping alloy of high strength which has high strength and 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 more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined by a series of points in any of FIGS. 1 to 5, and that proportion of Mn which ranges from 0.1 wt. % to the sum of the proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities. It preferably does not contain more than 0.01 wt. % of any of C, N, O, P and S.

## Claims

### Claim 1

A vibration-damping alloy of high strength 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, more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined in FIG. 1 by the lines connecting points A.sub.4 (Al: 7.05 wt. %; Si: 0.95 wt. %), B.sub.4 (Al: 6.5 wt. %; Si: 1.10 wt. %), C.sub.4 (Al: 4.70 wt. %; Si: 2.75 wt. %), D.sub.4 (Al: 2.25 wt. %; Si: 2.45 wt. %), E.sub.4 (Al: 1.00 wt. %; Si: 3.60 wt. %), F.sub.4 (Al: 1.00 wt. %; Si: more than 0.50 wt. %) and G.sub.4 (Al: 7.50 wt. %; Si: more than 0.50 wt. %), and that proportion of Mn which ranges from 0.1 wt. % to the sum of said proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities.

### Claim 2

A vibration-damping alloy of high strength 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, more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined in FIG. 2 by the lines connecting points A.sub.6 (Al: 7.45 wt. %; Si: 0.55 wt. %), B.sub.6 (Al: 3.30 wt. %; Si: 1.50 wt. %), C.sub.6 (Al: 1.00 wt. %; Si: 2.75 wt. %), D.sub.6 (Al: 1.00 wt. %; Si: more than 0.50 wt. %) and E.sub.6 (Al: 7.50 wt. %; Si: more than 0.50 wt. %), and that proportion of Mn which ranges from 0.1 wt. % to the sum of said proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities.

### Claim 3

A vibration-damping alloy of high strength 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, more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined in FIG. 3 by the lines connecting points A.sub.8 (Al: 5.35 wt. %; Si: more than 0.50 wt. %), B.sub.8 (Al: 5.35 wt. %; Si: 0.80 wt. %), C.sub.8 (Al: 3.30 wt. %; Si: 1.00 wt. %), D.sub.8 (Al: 2.30 wt. %; Si: 1.40 wt. %), E.sub.8 (Al: 1.00 wt. %; Si: 2.35 wt. %), and F.sub.8 (Al: 1.00 wt. %; Si: more than 0.50 wt. %), and that proportion of Mn which ranges from 0.1 wt. % to the sum of said proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities.

### Claim 4

A vibration-damping alloy of high strength 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, more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined in FIG. 4 by the lines connecting points A.sub.10 (Al: 4.60 wt. %; Si: more than 0.50 wt. %), B.sub.10 (Al: 4.60 wt. %; Si: 0.70 wt. %), C.sub.10 (Al: 3.20 wt. %; Si: 0.90 wt. %), D.sub.10 (Al: 2.55 wt. %; Si: 1.15 wt. %), E.sub.10 (Al: 1.00 wt. %; Si: 2.15 wt. %), and F.sub.10 (Al: 1.00 wt. %; Si: more than 0.50 wt. %), and that proportion of Mn which ranges from 0.1 wt. % to the sum of said proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities.

### Claim 5

A vibration-damping alloy of high strength 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, more than 0.50 wt. % Si, those proportions of Al and Si which fall within the range defined in FIG. 5 by the lines connecting points A.sub.12 (Al: 4.00 wt. %; Si: more than 0.50 wt. %), B.sub.12 (Al: 4.00 wt. %; Si: 0.70 wt. %), C.sub.12 (Al: 2.40 wt. %; Si: 0.95 wt. %), D.sub.12 (Al: 1.00 wt. %; Si: 1.90 wt. %), E.sub.12 (Al: 1.00 wt. %; Si: 1.30 wt. %), and F.sub.12 (Al: 2.05 wt. %; Si: more than 0.50 wt. %), and that proportion of Mn which ranges from 0.1 wt. % to the sum of said proportions of Al and Si, the balance of its composition being Fe and unavoidable impurities.