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Nickel-copper alloy bar and preparing method thereof

A technology of nickel-copper alloy and rod, which is applied in the field of nickel-copper alloy rod and its preparation, which can solve the problems of poor plasticity of the core material and failure to meet the use requirements, so as to avoid shrinkage cavities, reduce surface defects, and reduce inclusions, etc. The effect of defects

Inactive Publication Date: 2017-11-10
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Casting defects such as shrinkage cavities inevitably exist in the core of the cast rod prepared by the ordinary casting process; in the ordinary casting and extrusion forming method, since the deformation of the core of the billet is smaller than the deformation of the surface during forward extrusion forming, extrusion After forming, there are still original casting defects in the core of the extruded rod, which leads to poor plasticity of the core material and cannot meet the use requirements

Method used

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  • Nickel-copper alloy bar and preparing method thereof
  • Nickel-copper alloy bar and preparing method thereof

Examples

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Effect test

Embodiment 1

[0014] For example: a kind of NCu30-4-2-1 nickel-copper alloy rod, the outer diameter is Φ22mm, the length is 150-200mm, and the preparation of the heat treatment state includes the following steps:

[0015] (1) Preparation of master alloy ingots: mix electrolytic copper, pure nickel, silicon, iron, manganese and other raw materials, melt them in a vacuum induction furnace at 1380°C, refine them for 15 minutes, and cast ingots with an outer diameter of Φ140mm and a height of 350mm Master alloy ingot. The composition of the ingot is: wt%, C 0.023, S 0.0004, P 0.0007, O 0.0014, N 0.0002, Si 4.08, Mn1.09, Cu 30.92, Fe 2.20, Ni 61.08, Mg 0.0005, Pb 0.0003, Sb< 0.0001;

[0016] (2) Casting bar: Cut the NCu30-4-2-1 nickel-copper alloy ingot obtained in step (1), remove the surface oxide skin, melt it by vacuum induction at 1370°C for 30min, and pour it into the prepared investment mold. Vacuum precision casting under 0.1MPa. The diameter of the poured bar is Φ22mm, and the length...

Embodiment 2

[0020] For example: a kind of NCu30-4-2-1 nickel-copper alloy rod, the outer diameter is Φ32mm, and the length is 165mm. The preparation of the heat treatment state includes the following steps:

[0021] (1) Preparation of master alloy ingots: mix electrolytic copper, pure nickel, silicon, iron, manganese and other raw materials, melt them in a vacuum induction furnace at 1380°C, refine them for 15 minutes, and cast ingots with an outer diameter of Φ140mm and a height of 350mm Master alloy ingot. The composition of the ingot is: wt%, C 0.020, S 0.0005, P 0.0010, O 0.0015, N 0.0003, Si 4.10, Mn1.04, Cu 30.98, Fe 2.25, Ni 61.18, Mg 0.0008, Pb 0.0002, Sb< 0.0001;

[0022] (2) Casting bar: Cut the NCu30-4-2-1 nickel-copper alloy ingot obtained in step (1), remove the surface oxide skin, melt it by vacuum induction at 1370°C for 30min, and pour it into the prepared investment mold. Vacuum precision casting under 0.1MPa. The diameter of the poured bar is Φ32mm, and the length is ...

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Abstract

The invention relates to a nickel-copper alloy rod and a preparation method thereof, belonging to the technical field of metal processing. The formula ratio is as follows in terms of mass percentage: Cu 30%-32%, Si 3.9%-4.3%, Fe 1.5%-2.8%, Mn 0.5%-1.5%, impurity elements ≤ 0.3%, and the rest are Ni; through the master alloy Preparation of ingot, casting rod, solution heat treatment and aging heat treatment to obtain nickel-copper alloy rod. The invention adopts vacuum induction smelting, can obtain ultra-pure ingot with uniform composition, reduces defects such as inclusions, and can reduce surface defects of rods through investment precision casting, and can avoid the problem of shrinkage cavity in the core of the rod. Finally, after solid solution and aging heat treatment, high-strength and high-plastic rods can be obtained.

Description

technical field [0001] The invention relates to a nickel-copper alloy rod and a preparation method thereof, belonging to the technical field of metal processing. Background technique [0002] NCu30-4-2-1 nickel-copper alloy is Ni-Cu-Si-Fe-Mn system dispersion hardening high wear resistance Ni-based alloy, commonly known as silicon-containing Monel alloy, the alloy can be made by proper heat treatment Si is precipitated from the matrix in the form of intermetallic compound Ni3Si phase, and is dispersed in the grain boundary and grain, which greatly improves the strength and hardness of the alloy. NCu30-4-2-1 nickel-copper alloy has the characteristics of high strength, high hardness, excellent wear resistance and anti-adhesion, so it is suitable for manufacturing aviation fuel devices and other precision friction parts that require stable operation. application prospects. At present, NCu30-4-2-1 nickel-copper alloy rods are prepared by ordinary casting process, or by extrus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10
CPCC22C19/03C22C1/023C22F1/10
Inventor 周小红浦益龙周向东李淑萍浦海勇
Owner 江苏隆达超合金股份有限公司
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