CN104651765A - Copper sheet made through severe plastic deformation technology - Google Patents

Abstract

The invention relates to a copper sheet, and especially relates to a copper sheet made through a severe plastic deformation technology. The technology comprises the following steps: drawing a material, carrying out die forging, sawing, rolling, and annealing to obtain the copper sheet with fine crystal grins, high strength and high hardness, so the copper sheet has good superplasticity at room temperature or low temperature under a high strain rate, and has micro-structural superplasticity.

Description

A kind of copper sheet material by large plastometric set manufacture technics

Technical field

The present invention relates to a kind of copper sheet material, especially a kind of copper sheet material by large plastometric set manufacture technics.

Background technology

Though large plastometric set method in the past obtains remarkable progress, positive effect is had to grain refining, but these methods exist some problems equally, such as ECAP method is difficult to prepare size more than 20mm × 20mm × 100mm body nano material, and its operating process right and wrong are successional; HPT method can not prepare the nanometer/super fine crystal material of chunk sizes too.The more important thing is that these methods exist industrialized economy problems, namely production cost is too high, can not drop into industrial production.Institute is restricted in these processes at present always.

Summary of the invention

The present invention is intended to solve the problem, and provides a kind of copper sheet material by large plastometric set manufacture technics, is considering production cost while, crystal grain thinning, improve or improve further intensity or the hardness of material, obtain the method for super fine crystal material, its technical scheme adopted is as follows:

By a copper sheet material for large plastometric set manufacture technics, its step is followed successively by:

A) draw materials: choose the original technical pure copper rod being of a size of φ 20mm × 150mm;

B) die forging: the copper rod being swaged into diameter 4.5mm with the 40kg air hammer drop press progressive die, dimensional change is as follows:

φ20mm→φ18mm→φ15mm→φ12.7mm→φ10mm→φ8.6mm→φ7.3mm→φ6.2mm→φ5.3mm→φ4.5mm；

C) sawing: the copper rod sample of length 150mm got by saw;

D) rolling: under low temperature, become thickness to be the copper sheet of 0.6mm by duo mill continuous rolling, dimensional change is as follows:

4.2mm→3.8mm→3.4mm→2.9mm→2.4mm→1.9mm→1.5mm→1.0mm→0.6mm→0.6mm；

E) anneal: adopt argon shield low-temperature annealing treatment process, annealing temperature 100 DEG C, annealing time is 30 minutes, and it is cold that the type of cooling is stove.

Tool of the present invention has the following advantages: gained copper sheet material crystal grain is tiny, and high strength, high rigidity show good superplasticity under room temperature or low temperature and high strain rate, and is tissue hyper-plastic.

Accompanying drawing explanation

Fig. 1: production technological process of the present invention;

Embodiment

Below in conjunction with accompanying drawing and example, the invention will be further described, is easier to it will be appreciated by those skilled in the art that thus makes more explicit defining to protection scope of the present invention to make advantages and features of the invention.

By a copper sheet material for large plastometric set manufacture technics, its step is followed successively by:

A) draw materials: choose the original technical pure copper rod being of a size of φ 20mm × 150mm;

B) die forging: the copper rod being swaged into diameter 4.5mm with the 40kg air hammer drop press progressive die, dimensional change is as follows:

φ20mm→φ18mm→φ15mm→φ12.7mm→φ10mm→φ8.6mm→φ7.3mm→φ6.2mm→φ5.3mm→φ4.5mm；

C) sawing: the copper rod sample of length 150mm got by saw;

D) rolling: under low temperature, become thickness to be the copper sheet of 0.6mm by duo mill continuous rolling, dimensional change is as follows:

4.2mm→3.8mm→3.4mm→2.9mm→2.4mm→1.9mm→1.5mm→1.0mm→0.6mm→0.6mm；

E) anneal: adopt argon shield low-temperature annealing treatment process, annealing temperature 100 DEG C, annealing time is 30 minutes, and it is cold that the type of cooling is stove.

Describe the present invention by way of example above, but the invention is not restricted to above-mentioned specific embodiment, all any changes of doing based on the present invention or modification all belong to the scope of protection of present invention.

Claims (1)

1. by a copper sheet material for large plastometric set manufacture technics, it is characterized in that, its processing step is followed successively by:

A) draw materials: choose the original technical pure copper rod being of a size of φ 20mm × 150mm;

B) die forging: the copper rod being swaged into diameter 4.5mm with the 40kg air hammer drop press progressive die, dimensional change is as follows:

φ20mm→φ18mm→φ15mm→φ12.7mm→φ10mm→φ8.6mm→φ7.3mm→φ6.2mm→φ5.3mm→φ4.5mm；

C) sawing: the copper rod sample of length 150mm got by saw;

D) rolling: under low temperature, become thickness to be the copper sheet of 0.6mm by duo mill continuous rolling, dimensional change is as follows:

4.2mm→3.8mm→3.4mm→2.9mm→2.4mm→1.9mm→1.5mm→1.0mm→0.6mm→0.6mm；

E) anneal: adopt argon shield low-temperature annealing treatment process, annealing temperature 100 DEG C, annealing time is 30 minutes, and it is cold that the type of cooling is stove.