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Process method of producing high-grade TC4 alloy hot rolled plate with high material-obtaining rate and low cost

A process method and a yield technology, which are applied in the field of high yield and low-cost production of high-quality TC4 alloy hot-rolled sheets, can solve the problems of large grinding amount of hot-rolled billets or finished sheets, low material utilization rate, and high production costs, Achieve the effect of improving material yield, easy process and low production cost

Active Publication Date: 2014-07-23
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to its excellent comprehensive performance, TC4 alloy is widely used in aerospace, shipbuilding, health and sports industries. This alloy product accounts for more than 50% of the total output of titanium materials, but its wide application is limited due to its high production cost. Among them, the low utilization rate of materials and the large amount of grinding of hot-rolled billets or finished plates are one of the main reasons for the high cost.

Method used

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  • Process method of producing high-grade TC4 alloy hot rolled plate with high material-obtaining rate and low cost
  • Process method of producing high-grade TC4 alloy hot rolled plate with high material-obtaining rate and low cost

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Effect test

Embodiment 1

[0055] The 14×1000×1600mm specification TC4 plate prepared by the above-mentioned process method has no cracks after the finished product is rolled; the raw material slab yield rate reaches 92%, and the raw material finished product yield rate reaches 72%. The structure of the finished plate is relatively uniform, consisting of equiaxed α+flaky α and intergranular β, with a grain size of 12.5; the yield strength of the finished plate is 905 MPa, the tensile strength is 940 MPa, and the elongation is 16%, which is better than the national standard of TC4 plate and American standard related standards. Its metallographic structure is as figure 1 shown.

Embodiment 2

[0057] The 4 × 1000 × 2000mm TC4 plate prepared by the above process method has no cracks after rolling the finished product; the raw material slab yield rate reaches 92%, and the raw material finished product yield rate reaches 70%. The finished plate has a uniform structure, consisting of primary equiaxed and elongated α + secondary flake α + intergranular β, with a grain size of 12; the yield strength of the finished plate is 945 MPa, the tensile strength is 990 MPa, and the elongation is 19.5%, which is better than TC4 plate national standard and American standard related standards. Its metallographic structure is as figure 2 shown.

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Abstract

The invention presents a process method of producing a high-grade TC4 alloy hot rolled plate with a high material-obtaining rate and low cost, which comprises the following steps: slab ingot preparation through an EB, grinding, heat rolling, atmosphere annealing, sand blasting, pickling, grinding and sizing to obtain an annealed TC4 hot rolled plate, wherein a coloring and inspection technology is applied for the surface detection of a cogging bland and for the surface quality detection of a fire rolling blank. According to the invention, the EB is adopted to smelt and roll blank; the material-obtaining rate from the raw materials to slabs is improved to 92 percent, and the material-obtaining rate from the raw materials to finished products is improved to 69-73.6 percent; cracks are ensured to be removed completely, so as to achieve the purpose of no grinding or less grinding in follow-up rolling, and accordingly the labor and material cost for grinding is greatly reduced; and the prepared plate has the tensile strength of 950-1100 MPa, the yield strength of 880-980 MPa, and the elongation percentage among 14-20 percent, and meets the standard requirements of GB / T3621-2007, GT / B14845-2007 and ASTMB265-2006.

Description

technical field [0001] The invention relates to a processing technology for TC4 alloy hot-rolled sheets, in particular to a process method for producing high-quality TC4 alloy hot-rolled sheets with high material yield and low cost. Background technique [0002] Due to its excellent comprehensive performance, TC4 alloy is widely used in aerospace, shipbuilding, health and sports industries. This alloy product accounts for more than 50% of the total output of titanium materials, but its wide application is limited due to its high production cost. Among them, the low material utilization rate and the large amount of grinding of hot-rolled billets or finished plates are one of the main reasons for the high cost. Generally, TC4 alloys have to be smelted in a self-consumption melting furnace for more than 2 times to prepare ingots, and then thickened and drawn to prepare billets that meet the specifications required for hot rolling. However, peeling is required for each ingot rem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18C21D8/02B21B1/34
Inventor 李渤渤刘茵琪包淑娟郭朋顾新盛王卫超王树军
Owner LUOYANG SUNRUI TI PRECISION CASTING
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