A Treatment Method for Improving the Strength, Toughness and Dimensional Stability of Whisker Reinforced Aluminum Matrix Composite Forging Blanks
A technology of dimensional stability and processing method, which is applied in the field of whisker-reinforced aluminum matrix composite material processing to achieve the effect of improving strength, toughness and dimensional stability
A technology of dimensional stability and processing method, which is applied in the field of whisker-reinforced aluminum matrix composite material processing to achieve the effect of improving strength, toughness and dimensional stability
CN109371341BActive Publication Date: 2020-04-24HARBIN INST OF TECH
Image
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0029] Embodiment 1, the SiCw / 6061Al composite material that silicon carbide whisker (SiCw) volume fraction of this embodiment is 20vol.%, the treatment method that improves whisker-reinforced aluminum-based composite forging billet toughness and dimensional stability is as follows Steps completed:
[0030] Step 1. Preheat the whisker-reinforced aluminum matrix composite ingot for 300 minutes at 520°C±3°C, and preheat the upper and lower anvils of the press at the same time. The preheating temperature is 520°C±3°C. for 2h;
[0031] The ingot preheating heating time is according to t=d×k=(40mm)×(7.5min / mm).
[0032] Step 2. Place the ingot on the press, upsetting axially first, then upsetting radially, rotating 90° along the circumferential direction, and then upsetting radially. The axial strain is 0.4, and the axial strain rate is 0.04 / s; the radial compression strain is 0.2, and the radial strain rate is 0.02 / s;
[0033] Step 3, repeat the operation of step 2 4 times to o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a processing method for improving strength and toughness and dimensional stability of whisker reinforced aluminum-based composite material forged blanks, and belongs to the field of whisker reinforced aluminum-based composite material processing. The processing method comprises the following steps: step one, a cast ingot is preheated while an upper anvil and a lower anvil of a press machine are preheated; step two, the cast ingot is placed on the press machine, the cast ingot is subjected to axial upsetting, and then the cast ingot is subjected to radial upsetting, andthen radial upsetting is carried out after 90 degrees are rotated in the circumferential direction; step three, the operations of the step two are repeated; step four, a forged blank is placed in warmwater for quenching; step five, aging treatment and air cooling to room temperature are carried out; step six, the forged blank is Immersed in cooling liquid for treatment, step seven, the forged blank is taken out and rapidly put into liquid nitrogen for treatment, step eight, the forged blank is taken out and rapidly dipped in the cooling liquid for heat preservation; step nine, the forged blank is taken out, and after the forged blank heated to room temperature, the forged blank is heated for heat preservation, and air cooling to room temperature is carried out; step ten, the operations from step six to step nine are repeated. According to the processing method for improving the yield strength, the tensile strength and the micro-yield strength of the whisker reinforced aluminum-based composite material forged blanks, the strength and toughness and dimensional stability of the whisker reinforced aluminum-based composite material are remarkably improved.
Description
technical field [0001] The invention belongs to the field of processing whisker-reinforced aluminum-based composite materials; in particular, it relates to a processing method for improving the strength, toughness and dimensional stability of whisker-reinforced aluminum-based composite forging blanks. Background technique [0002] The key load-bearing structural parts in the field of aerospace and national defense often require materials to have high strength, toughness and dimensional stability (that is, the material size remains stable under load and during long-term service). In some application fields, such as optomechanical structural parts, inertial navigation device brackets, structural parts under high and low temperature alternating temperatures, etc., the dimensional stability of materials has become the main indicator for evaluating whether materials can meet the use requirements. Due to the characteristics of light weight, high specific modulus, high specific str...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
24 Apr 2020
Publication
CN109371341B
- IPC
- C22F1/04; C22C49/06; C22C101/14
- CPC
- C22C49/06; C22F1/002; C22F1/04
- Inventors
- 张学习; 钱明芳