Preparation method of high-strength iron-cobalt-nickel alloy

An iron-cobalt-nickel alloy and high-strength technology, which is applied in the field of preparation of high-strength iron-cobalt-nickel alloys, can solve the problems of small output and high preparation cost, and achieve the effects of high density, uniform grain size and high strength

Active Publication Date: 2019-03-26
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the traditional smelting method, the alloy prepared by mechanical alloying often has better properties, but due to the problems of sm

Method used

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  • Preparation method of high-strength iron-cobalt-nickel alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] 1. Weigh 54 g of iron powder, 58.8 g of cobalt powder, and 58.2 g of nickel powder, then mix the powders and add 9 g of n-heptane for ball milling. The ball milling parameters were set to 12:1 ball-to-material ratio, the ball mill speed was 300 rpm, the ball milling time was 60 hours, and the ball milling was carried out under high purity argon atmosphere.

[0024] 2. Put the ball-milled alloy powder into a high-temperature hydrogen reduction furnace and reduce it at 800°C for 2 hours. The reduced powder is quickly vacuum packaged.

[0025] 3. The reduced powder is sintered by SPS, the sintering temperature is 1100℃, the pressure is 50MPa, and the holding time is 6min

[0026] 4. Cover the sintered sample with a stainless steel sheath, heat the sample to 900°C to start hot rolling, the final rolling temperature is 750°C, and the rolling deformation is 80%.

[0027] 5. The hot-rolled alloy is heat-treated at 950°C for 12h under the protection of high-purity arg...

Example Embodiment

[0029] Example 2

[0030] 1. Weigh 60g of iron powder, 55.5g of cobalt powder, and 55.5g of nickel powder, then mix the powders and add 15g of n-heptane for ball milling. The parameters of the ball milling were set as the ball-to-material ratio of 10:1, the rotating speed of the ball mill was 350rpm, and the milling time was 72h. The milling was carried out under a high-purity argon atmosphere.

[0031] 2. Put the ball-milled alloy powder into a high-temperature hydrogen reduction furnace and reduce it at 700°C for 2.5 hours. The reduced powder is quickly vacuum packaged.

[0032] 3. Carry out SPS sintering of the reduced powder at a sintering temperature of 1000°C, a pressure of 60MPa, and a holding time of 8min

[0033] 4. Cover the sintered sample with a stainless steel sheath, heat the sample to 1000°C to start hot rolling, the final rolling temperature is 750°C, and the rolling deformation is 70%.

[0034] 5. The hot-rolled alloy is heat treated at 900°C for 24h under the protecti...

Example Embodiment

[0036] Example 3

[0037] 1. Weigh 60g of iron powder, 52.3g of cobalt powder, and 59g of nickel powder, then mix the powders and add 1.8g of stearic acid for ball milling. The ball milling parameters were set as 15:1 ball-to-material ratio, the ball mill speed was 350 rpm, the ball milling time was 48 hours, and the ball milling was performed under a high-purity argon atmosphere.

[0038] 2. Put the ball-milled alloy powder into a high-temperature hydrogen reduction furnace and reduce it at 900°C for 1.5 hours. The reduced powder is quickly vacuum packaged.

[0039] 3. The reduced powder is sintered by hot isostatic pressing, the sintering temperature is 1200℃, the pressure is 100MPa, and the time is 3h.

[0040] 4. Cover the sintered sample with a stainless steel sheath, heat the sample to 900°C to start hot rolling, the final rolling temperature is 750°C, and the rolling deformation is 80%.

[0041] 5. The hot-rolled alloy is heat-treated at 1050°C for 18h under the protection of hi...

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Abstract

The invention provides a preparation method of a high-strength iron-cobalt-nickel alloy and relates to the field of preparation of a high-strength alloy material. The preparation method comprises thesteps of firstly, weighing iron powder, cobalt powder and nickel powder according to a certain mass ratio; secondly, mixing the above powder and conducting ball milling under inert gas shielding to realize alloying; thirdly, conducting sintering molding on the alloyed powder through spark plasma sintering or hot isostatic sintering and conducting hot rolling or hot extrusion on sintered samples; and finally, removing stress through heat treatment and homogenizing the structure to obtain the high-strength iron-cobalt-nickel alloy. The iron-cobalt-nickel alloy prepared through the method is uniform in structure, has the average grain diameter being about 300 nm and the strength higher than 700 Mpa and is superior to an iron-cobalt-nickel alloy prepared through a smelting method.

Description

technical field [0001] The invention belongs to the field of preparation of iron-cobalt-nickel alloy materials, in particular to a preparation method of high-strength iron-cobalt-nickel alloy. Background technique [0002] Iron-cobalt-nickel ternary alloy is an important transition metal alloy, which has excellent magnetic properties and physical and chemical properties, such as high saturation magnetization, low thermal expansion coefficient, good corrosion resistance and high surface brightness [Zhan Jing, Yan Xin, Li Changjun, et al. Research progress in the preparation of iron-cobalt-nickel ternary alloys[J]. Metal Materials and Metallurgical Engineering, 2010,38(2):49-53.], but its strength is low, largely It limits its application [Anonymous. Iron-cobalt-nickel alloy with good low-temperature thermal expansion and high strength [J]. Metal Materials and Metallurgical Engineering, 1999 (6): 45.]. Iron-cobalt-nickel alloys are generally prepared by traditional smelting m...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C19/00C22C30/00C22C33/02C22C38/10
CPCC22C1/0433C22C19/00C22C30/00C22C33/0285C22C38/105
Inventor 常永勤李明洋郭远航李吴铭
Owner UNIV OF SCI & TECH BEIJING
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