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A kind of alloy solder suitable for 34crni3mo rotor parts

A technology of alloy brazing material and parts, which is applied in metal processing equipment, welding/cutting media/materials, welding equipment, etc., can solve the problems of high manufacturing cost and high price, and achieve improved liquid fluidity and gap filling performance , high electrical and thermal conductivity, self-strength and high-temperature performance improvement

Active Publication Date: 2021-11-19
XIAN YUANHANG VACUUM BRAZING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to ensure the reliability of 34CrNi3Mo rotor components, the brazing tensile strength σ b ≥750MPa, in the manufacture of 34CrNi3Mo rotor parts, brazing material with high gold content (gold content> 60%) is used, which is expensive, which also leads to high manufacturing costs of 34CrNi3Mo rotor parts
[0003] At present, the solders that can replace high gold content (gold content > 60%) mainly include gold-nickel-based solders (Au1-20NiCrBSiFe) and palladium-nickel-based solders (Pd5-36NiCrBSi) containing a small amount of precious metals. Brazing tensile strength σ b =842MPa, brazing tensile strength σ using palladium-nickel based solder b =825MPa, although gold-nickel-based solder and palladium-nickel-based solder can reduce a certain amount of cost, they still contain a certain amount of precious metals. In order to greatly reduce the cost of 34CrNi3Mo rotor components, and at the same time ensure that the strength and other properties meet the requirements of use, it is necessary to Research on a new type of low-cost high-strength solder

Method used

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  • A kind of alloy solder suitable for 34crni3mo rotor parts
  • A kind of alloy solder suitable for 34crni3mo rotor parts
  • A kind of alloy solder suitable for 34crni3mo rotor parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a kind of alloy solder suitable for 34CrNi3Mo rotor parts, by mass percentage, said alloy solder comprises:

[0034] 30% Mn;

[0035] 10% Co;

[0036] 5.8% Ni;

[0037] and the balance of Cu.

[0038] The alloy solder described in the present embodiment is obtained by the following steps: 1. The alloy components are smelted into an alloy according to the following composition ratio: Mn: 30%, Co: 10%, Ni: 5.8%, Cu: balance;

[0039] 2. It is prepared into powder particles or rolled into foil by gas atomization method.

[0040] It should be noted that there is no prior art for preparing the alloy into powder form or rolling the alloy into foil form by gas atomization method, which will not be repeated in this embodiment.

[0041] In order to verify the performance of the alloy solder, the present embodiment prepares the tensile test bar with the above-mentioned alloy solder, and detects that the tensile strength of the solder itself is 956MPa,...

Embodiment 2

[0046] This embodiment provides a kind of alloy solder suitable for 34CrNi3Mo rotor parts, by mass percentage, said alloy solder comprises:

[0047] 30% Mn;

[0048] 10% Co;

[0049] 6% Ni;

[0050] and the balance of Cu.

[0051] Alloy solder described in the present embodiment is obtained according to the following steps:

[0052] 1. The alloy components are smelted into alloys according to the following composition ratio: Mn: 30%, Co: 10%, Ni: 6%, Cu: balance;

[0053] 2. It is prepared into powder particles or rolled into foil by gas atomization method.

[0054] In this embodiment, the alloy solder of the above ratio is prepared into a tensile test rod, and it is detected that the tensile strength of the solder itself is 960MPa, which is higher than the strength value of 34CrNi3Mo, and the welding tensile strength is 852MPa, which meets the brazing requirements of 34CrNi3Mo parts. The alloy solder has a melting point of 929-966°C and a density of 8.685g / cm 3 , Vicker...

Embodiment 3

[0056] This embodiment provides a kind of alloy solder suitable for 34CrNi3Mo rotor parts, by mass percentage, said alloy solder comprises:

[0057] 30% Mn;

[0058] 10% Co;

[0059] 6.1% Ni;

[0060] and the balance of Cu.

[0061] Alloy solder described in the present embodiment is obtained according to the following steps:

[0062] 1. The alloy components are smelted into alloys according to the following composition ratio: Mn: 30%, Co: 10%, Ni: 6.1%, Cu: the balance;

[0063] 2. It is prepared into powder particles or rolled into foil by gas atomization method.

[0064] In this embodiment, the alloy solder of the above proportioning ratio is prepared into a tensile test rod, and it is detected that the tensile strength of the solder itself is 985MPa, which is higher than the strength value of 34CrNi3Mo, and the welding tensile strength is 886MPa, which meets the brazing requirements of 34CrNi3Mo parts. The alloy solder has a melting point of 934-982°C and a density of...

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Abstract

The invention discloses an alloy brazing filler metal suitable for 34CrNi3Mo rotor parts. According to mass percentage, the alloy brazing filler metal comprises 28-35% of Mn; 8-12% of Co; 5.5-6.5% of Ni; and the remainder Amount of Cu. The alloy of the invention can not only ensure the strength of the 34CrNi3Mo rotor part, but also reduce the manufacturing cost of the 34CrNi3Mo rotor part.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to an alloy solder suitable for 34CrNi3Mo rotor components. Background technique [0002] 34CrNi3Mo is a high-strength alloy structural steel with stable heat treatment performance and little change with temperature. It has good comprehensive mechanical properties and process properties. Its mechanical properties after quenching and tempering are as follows: tensile strength σ b : ≥755MPa, yield strength σ 0.2 : ≥590~785MPa, elongation δ 5 : ≥12~14%, reduction of area ψ: ≥32~40%, impact toughness value α ku : ≥32~55J / cm 2 , has been widely used in key components such as steam turbines and low-pressure rotors of engines. Vacuum brazing is currently an ideal process for manufacturing complex rotor parts of various engines, and a suitable solder that meets the process and product performance requirements is required. At present, in order to ensure the reliability of 34Cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 任耀文任军任轩李淑芳康路路
Owner XIAN YUANHANG VACUUM BRAZING TECH
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