CN-117363924-B - Preparation method of low-cost high-performance titanium-based composite material plate

CN117363924BCN 117363924 BCN117363924 BCN 117363924BCN-117363924-B

Abstract

The invention relates to a preparation method of a low-cost high-performance titanium-based composite material plate, which comprises the steps of firstly preparing materials, smelting, preparing cast ingots, cutting to obtain a titanium-based composite material plate blank, wherein the materials comprise high-purity Cr 3 C 2 powder accounting for 3% -6% of the total weight, and the balance of 0-level titanium sponge particles, then polishing, alkaline washing, acid washing and airing the surface of the titanium-based composite material plate blank, coating a high-temperature antioxidant coating on the surface of the plate blank, performing incremental gradient deformation hot rolling treatment on the plate blank, air cooling to room temperature to obtain a semi-finished titanium-based composite material plate, finally annealing the plate blank, polishing, alkaline washing, acid washing and airing the surface of the plate blank after annealing treatment to obtain a finished titanium-based composite material plate. The invention shortens the hot rolling process flow, avoids the problem of plate oxidation caused by multi-hot rolling treatment, effectively regulates and controls the distribution form of the reinforcing phase in the titanium-based composite plate, realizes the uniform distribution of the reinforcing phase, and has simple process and lower production cost.

Inventors

HUANG SHIXING
YANG ZHONG
WANG PING
GUO QIAOQIN
GUO YONGCHUN
LI JIANPING

Assignees

西安工业大学

Dates

Publication Date: 20260508
Application Date: 20231016

Claims (2)

1. The preparation method of the low-cost high-performance titanium-based composite material plate is characterized by comprising the following steps of: Firstly, batching, smelting, preparing cast ingots, and cutting to obtain a titanium-based composite slab, wherein the raw materials comprise high-purity Cr 3 C 2 powder accounting for 2-6% of the total weight, and the balance of 0-grade titanium sponge particles; Polishing, alkali washing, acid washing and airing the surface of the titanium-based composite material slab, coating a high-temperature oxidation-resistant coating on the surface of the slab, performing incremental gradient deformation hot rolling treatment on the slab, and air-cooling the plate to room temperature after hot rolling to obtain a semi-finished titanium-based composite material plate; The method comprises the steps of annealing a semi-finished titanium-based composite material plate, polishing, alkali washing, acid washing and airing the surface of the plate after annealing treatment to obtain a finished titanium-based composite material plate, wherein the purity of 0-grade titanium sponge is more than or equal to 99.97%, the particle size of 0-grade titanium sponge particles is 2-10 mm, the purity of Cr 3 C 2 powder is more than or equal to 99.95%, the particle size of Cr 3 C 2 powder is 0.325 mm, the titanium-based composite material is smelted by adopting a vacuum induction suspension smelting furnace, the vacuum degree is pumped to 3-5 x 10 -3 Pa before smelting, and the atmosphere protection is carried out by filling argon gas into the smelting furnace, the induction power during smelting is 200-400 kW, the smelting time is 20-40 min, the titanium-based composite material ingot is obtained after the smelting is finished, the titanium-based composite material ingot is cooled to room temperature after the smelting is finished, the rolling process of incremental gradient deformation is as follows, the rolling pressure is 500T, the rolling speed is 3 m/s, the rolling deformation amount of the first time is 10%, the rolling deformation amount of the second rolling deformation amount is 20%, the rolling deformation amount of the third rolling deformation amount is 30% and the total heat-preserving heat of the plate is carried out by placing the titanium-based composite material plate in the air cooling furnace at the temperature of 1000 ℃ for 1000 ℃ after the time of heat preservation, and the total rolling deformation is subjected to the heat of the plate is up to 1000% to the temperature of the heat preservation of the plate after the rolling furnace is subjected to the temperature of the heat.
2. The method of claim 1, wherein in the third step, the semi-finished titanium-based composite plate is placed in a heating furnace at 600 ℃ to be subjected to heat preservation of 120min for annealing treatment, and then air-cooled to room temperature to obtain the titanium-based composite plate.

Description

Preparation method of low-cost high-performance titanium-based composite material plate Technical Field The invention belongs to the technical field of metal matrix composite materials, and particularly relates to a preparation method of a low-cost high-performance titanium matrix composite material plate. Background The titanium alloy has the characteristics of small density, high specific strength, good corrosion resistance, good biocompatibility and the like, and is widely applied to the fields of aerospace, ocean engineering, petrochemical industry, biomedical treatment and the like. However, titanium and titanium alloys have low hardness and poor wear resistance, and cannot meet the performance requirements of the special field on high hardness and high wear resistance. The titanium-based composite material also has the characteristics of low density, high specific strength, good corrosion resistance and the like, and compared with the traditional titanium and titanium alloy, the titanium-based composite material also has higher elastic modulus, more excellent wear resistance and high-temperature performance. Therefore, the low-cost high-performance titanium-based composite material plate is an excellent candidate material meeting the performance indexes such as low density, high specific strength, high elastic modulus, high hardness, high wear resistance and the like, and is oriented to the urgent demands of the fields such as aerospace, national defense military, ocean engineering and the like on high-performance metal structural materials. However, because the reinforcing phase in the titanium-based composite material has larger differences in mechanical property, physical property and microstructure, the processing and forming of the titanium-based composite material have larger difficulty, and particularly the preparation technology of the titanium-based composite material plate is not mature enough. In the prior art, a titanium-based composite material ingot blank is mainly prepared by adopting a powder metallurgy method or a casting method, and then a hot rolling treatment is combined to prepare the titanium-based composite material plate. Patent CN113828776A discloses a preparation method of a TiBw reinforced titanium-based composite material plate, which adopts the following steps of preparing an ingot blank by powder metallurgy, carrying out hot rolling and annealing treatment for multiple times, so as to prepare the titanium-based composite material plate, but the method has high process cost, low density of the prepared plate and easy formation of sintering pores, and the method totally needs to carry out hot rolling treatment for 5-10 times, so that the plate absorbs excessive oxygen, carbon, nitrogen and other impurity elements in the hot rolling process, and the performance of the titanium-based composite material plate is reduced. Patent CN111500957a adopts a process of "smelting ingot + forging + hot rolling" to prepare a titanium-based composite material plate, the process needs to perform 16-pass hot rolling, and the multi-pass hot rolling treatment also causes the plate to absorb excessive impurity elements in the hot rolling process, so that the mechanical property of the titanium-based composite material plate is reduced. In conclusion, the method shortens and simplifies the rolling process of the titanium-based composite material plate, reduces the plate oxidation problem, optimizes the rolling process, reduces the process cost, and has very important engineering application value and significance. Disclosure of Invention The invention provides a preparation method of a low-cost high-performance titanium-based composite material plate, which aims to solve the problems of long rolling flow, plate oxidation and high process cost in the prior art. In order to solve the technical problems, the technical scheme adopted by the invention is that the preparation method of the low-cost high-performance titanium-based composite material plate comprises the following steps: Firstly, batching, smelting, preparing cast ingots, and cutting to obtain a titanium-based composite slab, wherein the raw materials comprise high-purity Cr3C2 powder accounting for 2% -6% of the total weight, and the balance of 0-grade titanium sponge particles; Polishing, alkali washing, acid washing and airing the surface of the titanium-based composite material slab, coating a high-temperature oxidation-resistant coating on the surface of the slab, performing incremental gradient deformation hot rolling treatment on the slab, and air-cooling the plate to room temperature after hot rolling to obtain a semi-finished titanium-based composite material plate; And thirdly, annealing the semi-finished titanium-based composite material plate, polishing the surface of the plate after annealing, alkali washing, acid washing and airing to obtain the finished titanium-based composite material plate. . Further, the purity of the