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Single fire rolling method for tc4 titanium alloy plate

A titanium alloy, 1.TC4 technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problem of poor formability of single-fire rolling alloys, and achieve good surface quality, good structure uniformity, Effect of Simplified Rolling Process

Active Publication Date: 2019-10-11
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in general, the multi-fire rolling process can be used to prepare TC4 titanium alloy with excellent microstructure and properties, and the formability of the single-fire rolled alloy is not good.

Method used

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  • Single fire rolling method for tc4 titanium alloy plate
  • Single fire rolling method for tc4 titanium alloy plate
  • Single fire rolling method for tc4 titanium alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 adopts the method of the present invention to carry out rolling to TC4 titanium alloy

[0039] The specific operation steps are as follows:

[0040] ①Use a walking heating furnace to heat the TC4 slab with a thickness of 151mm. The preheating section is <800°C for 90 minutes, the heating section is 930°C for 60 minutes, and the soaking section is 980°C for 90 minutes;

[0041] ② After soaking for 90 minutes in the soaking section, increase the temperature of the soaking section to 1000°C, continue holding for 30 minutes, and then roll out of the furnace;

[0042] ③ Turn off the cooling water and descaling water of the roller table, and quickly transfer the billet to the rolling mill for rolling;

[0043] ④ Change direction before starting rolling, that is, cross rolling is carried out in the first pass, and cross rolling is used in subsequent passes;

[0044] ⑤The starting rolling temperature is 955°C, the deformation in the first three passes is 24%, 29%...

Embodiment 2

[0048] Embodiment 2 adopts the method of the present invention to carry out rolling to TC4 titanium alloy

[0049] The specific operation steps are as follows:

[0050] ① Use a walking heating furnace to heat the TC4 slab with a thickness of 140mm. The preheating section is <800°C for 90 minutes, the heating section is 950°C for 60 minutes, and the soaking section is 980°C for 90 minutes;

[0051] ② After soaking for 90 minutes in the soaking section, increase the temperature of the soaking section to 1020°C, continue holding for 30 minutes, and then roll out of the furnace;

[0052] ③ Turn off the cooling water and descaling water of the roller table, and quickly transfer the billet to the rolling mill for rolling;

[0053]④ Change direction before starting rolling, that is, cross rolling is carried out in the first pass, and cross rolling is used in subsequent passes;

[0054] ⑤The starting rolling temperature is 960°C, the deformation in the first three passes is 25%, 28%...

Embodiment 3

[0058] Embodiment 3 adopts the method of the present invention to carry out rolling to TC4 titanium alloy

[0059] The specific operation steps are as follows:

[0060] ①Use a walking heating furnace to heat the TC4 slab with a thickness of 150mm. The preheating section is <800°C for 90 minutes, the heating section is 950°C for 60 minutes, and the soaking section is 980°C for 90 minutes;

[0061] ② After soaking for 90 minutes in the soaking section, increase the temperature of the soaking section to 1020°C, continue holding for 30 minutes, and then roll out of the furnace;

[0062] ③ Turn off the cooling water and descaling water of the roller table, and quickly transfer the billet to the rolling mill for rolling;

[0063] ④ Change direction before starting rolling, that is, cross rolling is carried out in the first pass, and cross rolling is used in subsequent passes;

[0064] ⑤The starting rolling temperature is 958°C, the deformation in the first three passes is 24%, 29%...

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Abstract

The invention belongs to the technical field of titanium alloy hot working forming and particularly relates to a single fire rolling method of a TC4 titanium alloy moderate-thickness plate. For the problems that the multi-fire-time rolling technology generally needs to be adopted for preparing and obtaining a TC4 titanium alloy with an excellent structure property, and forming performance of an alloy rolled in a single fire manner is poor, the single fire rolling method of the TC4 titanium alloy moderate-thickness plate comprises the following steps that a, a TC4 titanium alloy plate blank isheated; b, after soaking is completed, the soaking temperature is increased to 1000 DEG C to 1020 DEG C, the temperature continues to be kept for 30-60 min, and then the plate blank is discharged froma furnace and rolled; c, before rolling is carried out, roller way cooling water and phosphorus removal water are turned off, the beginning rolling temperature is larger than or equal to 950 DEG C, and the final rolling temperature is larger than 800 DEG C; and d, the rolled plate blank is subjected to annealing heat treatment, then the plate blank is discharged from the furnace and cooled in air, and the TC4 titanium alloy is obtained. According to the method, structure uniformity of the rolled TC4 titanium alloy moderate-thickness plate is good, the surface quality is good, and the requirement of the national standard can be met. The rolling technology is simplified, the rolling efficiency is improved, and the production cost is reduced remarkably.

Description

technical field [0001] The invention belongs to the technical field of thermal processing and forming of titanium alloys, and in particular relates to a single fire rolling method for medium and thick plates of TC4 titanium alloys. Background technique [0002] TC4 is a medium-strength α+β two-phase titanium alloy, and the transformation temperature between α+β is about 980°C. TC4 has excellent comprehensive performance and is widely used in the aerospace industry. Its long-term working temperature can reach 400°C. In the aviation industry, it is mainly used to manufacture engine fans, compressor discs and blades, as well as important load-bearing components such as beams, joints and bulkheads in aircraft structures. The mechanical properties of TC4 alloy are related to the quantity and shape of the primary α phase, and are also closely related to the processing conditions during the forming process of the material. The microstructure evolution during forming will affect th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/22B21B45/00B21B37/74C21D1/26C21D9/00
Inventor 杨柳王莹江健方强
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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