Processing method for smelting TC4 alloy ingots by electron beam cold-bed furnace

An electron beam cooling hearth furnace and alloy ingot casting technology, which is applied in the field of titanium alloys, can solve the problems of quality level limitation and application, and achieve the effect of stability and reliability guarantee

Inactive Publication Date: 2019-01-04
青海聚能钛金属材料技术研究有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Vacuum consumable arc melting (VAR) is the dominant process for preparing titanium alloy ingots, but the quality level of VAR ingots limits its application in high-end fields such as aerospace

Method used

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  • Processing method for smelting TC4 alloy ingots by electron beam cold-bed furnace
  • Processing method for smelting TC4 alloy ingots by electron beam cold-bed furnace
  • Processing method for smelting TC4 alloy ingots by electron beam cold-bed furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, one-time smelting of EB furnace prepares TC4 alloy flat ingot

[0034] The TC4 alloy slabs were produced by smelting TC4 alloy raw materials at one time by using an electron beam cooling hearth furnace, and the numbers were No.1, No.2, and No.3 respectively.

[0035] Table 1. Chemical composition of TC4 alloy slabs

[0036]

[0037] Above-mentioned production obtains the method for TC4 alloy flat ingot as follows:

[0038] Use the 3150KWB BMO-01 electron beam cooling hearth furnace imported from Ukraine, with sponge titanium (grade 1), aluminum vanadium master alloy (58V), aluminum beans, TiO 2 Powder and iron nails are TC4 alloy raw materials, and a single smelting is carried out according to the following steps to obtain TC4 alloy flat ingots:

[0039] 1) The stage of starting the electron gun: the liquid formed from starting the electron gun to the melting of raw materials flows into the crystallizer for the first time; wherein, the average vacuum ...

Embodiment 2

[0048] The processing method of embodiment 2, TC4 alloy flat ingot

[0049] 1. Direct rolling forming process

[0050] No.1 and No.2 ingots shown in Table 1 in Example 1 are directly rolled and heat treated to obtain TC4 alloy plates, as follows:

[0051] After the ingots were skinned and risers cut, the plate direct rolling test was carried out respectively. Among them, the No.1 and No.2 ingots were subjected to horizontal-longitudinal cross rolling and longitudinal rolling respectively, and the longitudinal rolling direction was the ingot solidification direction (Note: the ingot solidification method is continuous solidification, and the ingot specification H (thickness) × B (width) × L (length) as an example, then the L (length) direction is the continuous solidification and forming direction of the ingot, that is, the longitudinal direction; the B (width) direction is the transverse direction). After 2 / 4 heat rolling, a plate with thickness δ=25 / 8mm is obtained.

[005...

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Abstract

The invention discloses a processing method for smelting TC4 alloy ingots by an electron beam cold-bed furnace. The method includes steps: adopting the electron beam cold-bed furnace for primary smelting to obtain the TC4 alloy ingots; subjecting the TC4 alloy ingots to direct rolling treatment to obtain TC4 alloy plates. A final-state structure of the TC4 alloy plates is an equiaxed structure, and small grain size and excellent mechanical property stability are realized. The method is free of a forging step, has the advantage of short processing route and is especially suitable for preparation of large-size wide plates. Stability and reliability in application of the electron beam cold-bed furnace to TC4 alloy smelting are guaranteed.

Description

technical field [0001] The invention relates to the field of titanium alloys, in particular to a processing method for melting TC4 alloy ingots in an electron beam cooling bed furnace and a TC4 alloy plate. Background technique [0002] Due to its excellent corrosion resistance, low density, high specific strength, good toughness and weldability and other advantages, titanium alloys have been successfully applied in aerospace, petrochemical, marine ships, automobiles, medicine and other departments. [0003] Vacuum consumable arc melting (VAR) is the dominant process for preparing titanium alloy ingots, but the quality level of VAR ingots limits its application in high-end fields such as aerospace. In order to obtain high-quality titanium alloy materials with high cleanliness for aero-engines, the application of electron beam cooling bed melting method (EBCHM) is the right choice. The United States has matured the technology for smelting titanium alloys by EBCHM. The Ti6Al4...

Claims

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Application Information

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IPC IPC(8): C22C1/03C21D9/00C22C1/10C22C14/00C22F1/18B21B1/38
CPCC22C14/00B21B1/38B21B2001/386C21D9/0081C22C1/1036C22F1/183
Inventor 杜彬张志斌周武王福清钱光凝
Owner 青海聚能钛金属材料技术研究有限公司
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