CN1405343A - High-strength nickel-copper alloy and production method thereof - Google Patents

Abstract

The invention is a high-intensity Ni-Cu alloy produced by adding appropriate amount of Cr, Co, Mg and Re in Monel-K500 Ni-group alloy, and the content of Cr, Co, Mg and Re is respectively 0.005-0.50%, and Cr+Co+Mg+Re<=2%. The formula (wt%):Cu 28-33%; Ni 63-66%; Fe 1-2%; Mn 1-2%; Si 0.1-1%; C 0.05-0.30%; Al 2-4%; Ti 0.40-0.80%; Cr+Co+Mg+Re<=2%. The technical flow: 1, charging: 2. vacuum melting and casting; 3. forging and hot-rolling; 4. washing and cold-drawing; 5. heat treatment.

Description

High-strength nickel-copper alloy and production method thereof

Technical field: the present invention relates to a kind of alloy and manufacture method thereof, refer to a kind of high-strength nickel-copper alloy and manufacture method thereof especially.

Background technology: Monel nickel-copper alloy coupled in series Ni and Cu separately advantage aspect erosion resistance, have excellent erosion resistance.Improved Monel alloy, as the Monel-K500 nickel-base alloy, good corrosion resistance not only, and has a good comprehensive mechanical performance, as higher yield strength and tensile strength, even good plasticity and twisting property are when the low temperature of 25K, still having good toughness, plasticity and intensity, is the important alloy material that is widely used in industry such as oil, chemical industry, nuclear power.But Monel-K500 nickel-base alloy inappropriate technology when high temperature process causes the processing cracking easily, and high-temp plastic is not ideal enough, also can be excessive in ag(e)ing process because of cold deformation, cause the timeliness cracking.Because its hot-work requires temperature very high, thereby this alloy hot-work difficulty, oxide skin is serious, and crizzle is many, so yield rate is low in the alloy production, the product cost height, and benefit is low.

Summary of the invention:

The objective of the invention is in the Monel-K500 nickel-base alloy, to add an amount of trace element, and carry out optimum combination, propose rational content, and under just right pyroplastic deformability's condition, obtain the superplasticity of this alloy.

High-strength nickel-copper alloy of the present invention is to add proper C r, Co, Mg, Re in the Monel-K500 nickel-base alloy, wherein the content of Cr, Co, Mg, Re (weight percent) respectively between 0005-0.50%, and Cr+Co+Mg+Re≤2%.

High-strength nickel-copper alloy prescription of the present invention (by weight percentage) is: Cu 28-33%, Ni 63-66%, Fe 1-2%, Mn 1-2%, Si 0.1-1%, C 0.05-0.30%, Al2-4%, Ti 0.40-0.80%, Cr+Co+Mg+Re≤2%.

Its technological process of production is:

A) batching: by the prescription batching;

B) vacuum melting ingot casting: melting in vacuum smelting furnace, ingot casting;

C) forging, hot rolling: under 1020-1140 ℃ of temperature, be swaged to required rule after the peeling

Lattice base material;

D) cleaning, cold-drawn: cold-drawn is to the section bar of required specification after technical hydrochloric acid cleans;

E) thermal treatment: be incubated 15-20 hour down at 580-600 ℃, drop to 520-560

℃ time insulation 6-10 hour drops to 400-500 ℃ of insulation 6-10 hour again

After, air cooling or stove are cold.

Promptly obtain required best over-all properties.

High-strength nickel-copper alloy of the present invention is compared with the Monel-K500 nickel-base alloy, can make 40-80 ℃ of its hot processing temperature decline, like this in hot procedure, do not produce oxide skin, non-microcracked, not only lumber recovery has improved more than 80%, and has obtained the high-quality product of high strength, high-ductility, surface aesthetic.

Description of drawings:

Fig. 1 is a technological process of production block diagram of the present invention.

Wherein: 1 batching, 2 vacuum melting ingot castings, 3 forgings, hot rolling, 4 cleanings, cold-drawn, 5 thermal treatments.

Embodiment:

Embodiment: alloy is by (weight percent) Cu 29%, Ni 64%, Fe 1.1%, and Mn 1.1%, and Si 0.2%, C 0.1 5%, Al 3%, and Ti 0.6%, the proportioning of Cr+Co+Mg+Re=0.5%, in vacuum smelting furnace, the melting ingot casting forges down at 1020-1140 ℃ after the peeling, hot rolling is to the base material of required specification, after technical hydrochloric acid cleans, cold-drawn is to required specification section bar, insulation is after 15-20 hour down at 580-600 ℃ then, and insulation drops to 400-500 ℃ of insulation after 6-10 hour after 6-10 hour again when dropping to 520-560 ℃, air cooling or stove are cold, promptly make desired product.

Claims (3)

1. high-strength nickel-copper alloy, it is characterized in that it being in the Mone1-K500 nickel-base alloy, to add proper C r, Co, Mg, Re, wherein the content of Cr, Co, Mg, Re (weight percent) is respectively between 0.005-0.50%, and Cr+Co+Mg+Re≤2%.

2. high-strength nickel-copper alloy according to claim 1 is characterized in that its prescription (by weight percentage) is: Cu 28-33%, Ni 63-66%, Fe 1-2%, Mn 1-2%, Si 0.1-1%, C 0.05-0.30%, Al 2-4%, Ti 0.40-0.80%, Cr+Co+Mg+Re≤2%.

3. the production method of high-strength nickel-copper alloy according to claim 1 is characterized in that its technological process of production is:

A) batching: by the prescription batching;

B) vacuum melting ingot casting: melting in vacuum smelting furnace, ingot casting;

C) forging, hot rolling: under 1020-1140 ℃ of temperature, be swaged to required specification base material after the peeling;

D) cleaning, cold-drawn: cold-drawn is to the section bar of required specification after technical hydrochloric acid cleans;

E) thermal treatment: be incubated 15-20 hour down at 580-600 ℃, insulation is 6-10 hour when dropping to 520-560 ℃, drops to 400-500 ℃ of insulation again after 6-10 hour, and air cooling or stove are cold.