A kind of high toughness casting Fe-cr-mo base high damping alloy and its preparation method

A high damping alloy, fe-cr-mo technology, applied in the field of damping alloy materials, can solve the problems of complex ferritic stainless steel, unsatisfactory improvement of toughness and high cost of Fe-Cr-Mo based damping alloy, and achieve high purity Degree, improve metal flow properties, improve the effect of toughness

Active Publication Date: 2018-08-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the degree of control of impurity elements is related to the development of the smelting process, it is greatly affected by the smelting process. Therefore, improving the toughness of ferritic stainless steel through this method requires complex processes and high costs. The toughness improvement effect of the base damping alloy is not ideal
At present, there is no method to improve the toughness of Fe-Cr-Mo based damping alloy without affecting its damping performance.

Method used

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  • A kind of high toughness casting Fe-cr-mo base high damping alloy and its preparation method
  • A kind of high toughness casting Fe-cr-mo base high damping alloy and its preparation method
  • A kind of high toughness casting Fe-cr-mo base high damping alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The high-toughness casting Fe-Cr-Mo-based high-damping alloy described in this embodiment, the mass percentages of each component and component in the alloy are as follows: Cr is 16%, Mo is 2%, Si is 0.3%, and Mn is 1.0%, Ni is 1.6%, Zr is 0.2%, and the balance is Fe.

[0025] Preparation:

[0026] (1) Add industrial pure iron (C content ≤ 0.006%), crystalline silicon Si-1, metal chromium JCr99-A, industrial pure molybdenum Mo-1, and electrolytic nickel Ni9996 into vacuum induction melting In the crucible of the furnace, place the casting mold in the vacuum melting furnace. After the vacuum is evacuated to 0.3Pa, the electric heating is started. After all the metal is melted, it is refined at 1600-1650°C for 20 minutes. Refining is completed, stop power transmission, and stand still for 3 minutes. Then add zirconium-nickel alloy into the molten metal under high vacuum (vacuum degree not less than 0.5Pa), and fill it with argon to 0.005Mpa, then add electrolytic mangan...

Embodiment 2

[0038] The high-toughness casting Fe-Cr-Mo-based high-damping alloy described in this embodiment has the following components and the mass percentages of the components in the alloy: 15% for Cr, 2.5% for Mo, 0.5% for Si, and 0.5% for Mn 0.5%, Ni is 1.0%, Zr is 0.05%, and the balance is Fe.

[0039] The difference between the preparation method of the alloy and that of Example 1 is that the Zr source is zirconium sponge, the damping heat treatment temperature is 1050° C., and the heat treatment time is 40 minutes.

[0040] After testing, the impact toughness of the obtained alloy is A ku is 103J, the tensile strength of the alloy is 375MPa, and the elongation is 23.9%; when the alternating strain is 8×10 -5 When, the damping performance Q -1 is 0.0455.

Embodiment 3

[0042] The high-toughness casting Fe-Cr-Mo-based high-damping alloy described in this embodiment, the mass percentages of each component and component in the alloy are as follows: Cr is 17%, Mo is 1.5%, Si is 0.8%, and Mn is 0.6%, Ni is 1.2%, Zr is 0.1%, and the balance is Fe.

[0043] The difference between the preparation method of the alloy and Example 1 lies in that: the Zr source is zirconium sponge; the damping heat treatment temperature is 1000° C., and the heat treatment time is 80 minutes.

[0044] After testing, the impact toughness of the obtained alloy is A ku It is 104J, the tensile strength of the alloy is 410MPa, and the elongation is 22.3%; when the alternating strain is 8×10 -5 When, the damping performance Q -1 is 0.0494.

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Abstract

The invention provides high-toughness casting Fe-Cr-Mo-based high-damping alloy. The alloy contains 0.05-0.8% of Zr in percentage by mass. Preferably, the alloy comprises the following components in percentage by mass: 13-17% of Cr, 1-4% of Mo, 0.3-1.5% of Si, 0.3-1.0% of Mn, 0-2.0% of Ni, 0.05-0.8% of Zr and the balance of Fe. The preparation method of the high-toughness casting Fe-Cr-Mo-based high-damping alloy comprises the following steps: weighing raw materials according to the components and the component ratio of the high-toughness casting Fe-Cr-Mo-based high-damping alloy; carrying out vacuum induction melting and pouring to obtain an alloy casting; and carrying out damping heat treatment on the alloy casting to obtain the high-toughness casting Fe-Cr-Mo-based high-damping alloy. During vacuum induction melting, a Zr source is added in the later stage of refining under the condition of vacuum. On the premise of not reducing damping property, the toughness of the Fe-Cr-Mo-based damping alloy can be greatly improved.

Description

technical field [0001] The invention belongs to the field of damping alloy materials, and in particular relates to a casting Fe-Cr-Mo-based damping alloy and a preparation method thereof. Background technique [0002] Damping alloy is a kind of alloy that can absorb energy under certain conditions to make it have damping effects such as vibration reduction and noise reduction. In noise and vibration control technology, the control and vibration isolation of the source of noise and vibration is an active and effective means. People expect to use damping alloy materials to strengthen the control and vibration isolation of noise and vibration sources. Fe-Cr-Mo-based ferromagnetic damping alloy has good tensile mechanical properties, excellent corrosion resistance, high damping characteristics, and relatively lower production cost than other damping alloys, and its damping performance is not affected by vibration frequency. It still has high damping performance when the tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/50C22C38/02C22C38/04C22C33/04C21D6/00
CPCC21D6/004C21D6/005C21D6/008C22C33/04C22C38/02C22C38/04C22C38/44C22C38/50
Inventor 李宁颜家振牟潇潇刘颖赵修臣晏尚华
Owner SICHUAN UNIV
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