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Cr-containing high-strength constant-expansion alloy

A constant expansion, high strength technology, applied in the field of metal materials, can solve problems such as unsatisfactory alloys, achieve the effect of improving purity, ensuring stability, promoting technological progress and industrial development

Active Publication Date: 2017-12-22
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] There is currently no alloy that meets the above properties

Method used

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  • Cr-containing high-strength constant-expansion alloy
  • Cr-containing high-strength constant-expansion alloy
  • Cr-containing high-strength constant-expansion alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] High-strength constant expansion alloy, its chemical composition is calculated by weight percentage: C: 0.03; Si: 0.10; Mn: 0.60; Ni: 35.0; Cr: 2.5; Nb: 0.8; Co: 0.8; the balance is Fe;

[0060] The preparation method of the above-mentioned novel high-strength constant expansion alloy comprises the following steps:

[0061] a) Melting

[0062] Each component is weighed according to the weight percentage of its chemical composition. The alloy adopts vacuum induction melting. When vacuum induction melting is carried out, a secondary refining process is adopted. The first refining temperature is slightly higher and the time is slightly longer;

[0063] first refining

[0064] Put the base materials into the furnace: Fe, Nb, Co, Ni, Cr, melt at a temperature higher than 1600°C, and control the vacuum degree of 15-25Pa, and melt at a time of 0.6min / kg;

[0065] second refining

[0066] The second refining adopts low-temperature short-time refining, puts C, Si, and Mn into...

Embodiment 2

[0079] High-strength constant expansion alloy, its chemical composition is calculated by weight percentage: C: 0.05; Si: 0.20; Mn: 0.50; Ni: 37.5; Cr: 1.0; Nb: 0.8; Co: 1.0; the balance is Fe, produced Alloy ingots are hot-worked and cold-worked into alloy materials, which are used in seals.

[0080] The preparation method is the same as in Example 1. The obtained samples were tested, and the performance test values ​​are shown in Table 4:

[0081] Table 4 Example 1 sample performance test value

[0082]

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Abstract

The invention relates to a Cr-containing high-strength constant expansion alloy. The weight percentage of each component of the alloy is: C≤0.08; Si≤0.40; Mn≤1.0; S≤0.010; P≤0.010; Ni: 35.0~ 38.0; Cr: 0.8-2.5; Nb≤1.0; Co: 0.5-1.5; the balance is Fe. The alloy has high mechanical strength at room temperature and dynamic modulus of elasticity, and is used in precision instruments and equipment with special requirements and other precision instruments and equipment with such requirements.

Description

technical field [0001] The invention relates to a metal material, in particular to a Cr-containing high-strength constant expansion alloy. Background technique [0002] The main feature of the constant expansion alloy is that it has an expansion coefficient close to that of the sealed material such as glass or ceramics within a certain temperature range, so that the effect of matching (or non-matching) sealing can be achieved. Therefore, it can also be called sealing alloy. It is widely used as lead and structural material in electron tubes, transistors and integrated circuits. The so-called matched sealing means that the difference between the expansion coefficients of the alloy and the material to be sealed is less than 10% within the range from the sealing temperature to room temperature. "Air leak. [0003] At present, the main alloy grades of constant expansion alloys are: [0004] 1. Fe-Ni series constant expansion alloy [0005] Typical grades are: 4J42 alloy. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/52C22C33/04C21D6/00
Inventor 王方军王东哲张中美刘敏贺文海刘海定李永友喻峰
Owner CHONGQING MATERIALS RES INST
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