CN102189203A - Method for rolling hard aluminum ring pieces - Google Patents

Abstract

The invention discloses a method for rolling hard aluminum ring pieces, and relates to a machining method of hard aluminum ring pieces. The invention aims to provide a method capable of efficiently and quickly machining hard aluminum ring pieces; and the method has high processing efficiency, the product quality is stable and reliable, a large amount of energy is saved, the machining cost is low, and the whole machining process is safe and environmentally-friendly. The invention adopts the technical scheme that the method for rolling the hard aluminum ring pieces comprises the following steps of: a, heating a workpiece raw material to the temperature of between 300 and 500 DEG C, and then preserving the heat for 1 to 3 hours; b, quickly heating the workpiece raw material, and performing high-temperature short-time heat preservation to 380-470 DEG C; c, quickly discharging the workpiece raw material, quickly and repeatedly upsetting, drawing and hammering the workpiece raw material along the crystal grain direction at the speed of 80 to 100 times per minute till the finish forging temperature is 380 to 300 DEG C, and preserving the heat; and d, heating again, rolling to form a ring shape, and performing stabilized annealing. The method is mainly applied to machining of the hard aluminum ring pieces and various nonferrous metal products.

Description

The rolling method of duralumin ring

Technical field

The present invention relates to a kind of processing and treating method of duralumin ring.

Technical background

Quick growth along with global economy, the aggravation of market competition, forging industry faces the pressure of two aspects at present: the one, and people require factory to reduce sulfur dioxide and smoke discharge amount to global environment problem growing interest, satisfy the environmental requirement of strict energy-saving and emission-reduction; The 2nd, improve independent research and development capacity, integrate with world level.Forging and rolling technique to duralumin are again the difficult problems of forging industry, and the superplastic research of duralumin is the key of head it off.Therefore,, not only can improve the level of whole alloy forging, more help accelerating the development of national defence and seafaring if this product can obtain successful production in batches.The key of duralumin production is the acquisition of maximum percentage elongation, and the key that obtains maximum percentage elongation is the principle according to fine crystalline superplastic, and the key that improves this Alloy during Superplastic is how to obtain the fine grained texture of this alloy.The shortcoming that existing FMT exists mainly contains: 1. waste product is many, lumber recovery is low, is easy to generate implosion and face crack, and is rough smooth, and bigger concavo-convex phenomenon is arranged; From former expect finished product will be repeatedly repeatedly, heating for multiple times forges, feed consumption height (oxidation) length consuming time like this, the power consumption height yields poorly; 3. harmful element discharging is big, to the Manufacturing Worker is healthy bigger influence is arranged.

Summary of the invention

The method that the purpose of this invention is to provide the efficient rapid processing duralumin of a kind of energy ring, this method working (machining) efficiency height, stable and reliable product quality is saved a large amount of energy, saves a large amount of raw material, and processing cost is low, and whole process energy-saving and emission-reduction safety and environmental protection.

To achieve the object of the present invention, the technical solution used in the present invention is: the rolling method of duralumin ring comprises the following steps:

A, the workpiece raw material is heated to 300 ℃---500 ℃, be incubated 1-3 hour then;

B, then it is carried out the insulation of Fast Heating and high temperature, short time to 380 ℃-470 ℃;

C, fast come out of the stove after, along grain orientation with 80-100 time/minute speed fast repeatedly Upsetting slightly pull out and forge, up to final forging temperature at 380 ℃-300 ℃;

D, heat up and to be rolled into annular once more, carry out stabilizing annealing then.

Can draw from every technical characterictic of foregoing invention, advantage of the present invention is: because the duralumin material requires high for heating-up temperature, the best superplastic forming temperature range of this material is very narrow, so the percentage elongation that obtains in its deformation process is required very high, the present invention is by the control heating-up temperature, the technology that adopts high temperature Fast Heating forming core to forge fast makes its grain refinement and produces high-quality product thereby obtains its maximum percentage elongation.The product that adopts this explained hereafter is good mechanical property not only, and quality level is leading, and is beneficial to the production that realizes mass, and advantage of the present invention mainly contains:

1, feed consumption is low, can save the above raw material of 12%--15%, lumber recovery height, no waste product;

2, quality of finished product good, no implosion and external crack, surfacing is smooth, no concave-convex hole phenomenon;

3, surplus is little during machined, reduces machining period, improves the processing work efficiency, shortens process time;

4, adopt this technology can improve the plasticity of workpiece, material, improve the physical property of product and the service life of product;

5, energy savings reduces the harmful element gas purging;

6, the duralumin spare of process PROCESS FOR TREATMENT of the present invention can obtain the fine grained texture less than 10 microns, thereby makes this alloy obtain maximum percentage elongation in best rate of straining.

The specific embodiment

The present invention will be further described below in conjunction with specific embodiment.

Preferred embodiment

In the present embodiment, we realize through the following steps:

A, the workpiece raw material is heated to 300 ℃---500 ℃, be incubated 1-3 hour then;

B, then it is carried out the insulation of Fast Heating and high temperature, short time to 380 ℃-470 ℃;

C, fast come out of the stove after, along grain orientation with 80-100 time/minute speed fast repeatedly the thick pulling of Upsetting forge,, after 380 ℃-300 ℃, be incubated up to final forging temperature;

D, heat up and to be rolled into annular once more, carry out stabilizing annealing then.

In above-mentioned steps, among the step a: it can be 300 ℃, 320 ℃, 340 ℃, 350 ℃, 360 ℃, 380 ℃, 400 ℃, 420 ℃, 430 ℃, 450 ℃, 460 ℃, 480 ℃ or 500 ℃ that the workpiece raw material is heated the temperature that reaches.Among the step b: then it being carried out the temperature that Fast Heating and high temperature, short time insulation reach can be: 380 ℃, 390 ℃, 400 ℃, 415 ℃, 425 ℃, 435 ℃, 445 ℃, 455 ℃ or 470 ℃.Among the step c: along grain orientation fast repeatedly the speed that forges of the thick pulling of Upsetting can be: 80 times/minute, 85 times/minute, 88 times/minute, 92 times/minute, 95 times/minute or 100 times/minute.Among the step c: final forging temperature can be 380 ℃, 370 ℃, 365 ℃, 350 ℃, 340 ℃, 335 ℃, 325 ℃, 320 ℃, 310 ℃ or 300 ℃.

Disclosed all features in this specification except mutually exclusive feature, all can make up by any way.

Disclosed arbitrary feature in this specification (comprising any accessory claim, summary) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.Unless promptly special narration, each feature is an example in a series of equivalences or the similar characteristics.

Claims (1)

1. the rolling method of duralumin ring is characterized in that comprising the following steps:

A, the workpiece raw material is heated to 300 ℃---500 ℃, be incubated 1-3 hour then;

B, then it is carried out the insulation of Fast Heating and high temperature, short time to 380 ℃-470 ℃;

C, fast come out of the stove after, along grain orientation with 80-100 time/minute speed fast repeatedly Upsetting slightly pull out and forge, up to final forging temperature at 380 ℃-300 ℃;

D, heat up and to be rolled into annular once more, carry out stabilizing annealing then.