Preparing method of zirconium alloy hot rolled plate

A zirconium alloy and plate technology, which is applied in metal rolling, metal processing equipment, heating/cooling equipment, etc., can solve the problems that limit the development of zirconium alloy medium and thick plates, and achieve controllable transfer time, excellent corrosion resistance, and production short cycle effect

Active Publication Date: 2020-03-13
国核宝钛锆业股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This situation has greatly restricted the development of domestic zirconium alloy medium and thick plates, so we must pay close attention to independent innovation and develop the production and processing technology of zirconium alloy medium and thick plates as soon as possible

Method used

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  • Preparing method of zirconium alloy hot rolled plate
  • Preparing method of zirconium alloy hot rolled plate
  • Preparing method of zirconium alloy hot rolled plate

Examples

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preparation example Construction

[0039] figure 1 It is a schematic flowchart of a method for preparing a zirconium alloy hot-rolled plate according to a specific embodiment of the present invention. Such as figure 1 Shown, this preparation method flow process comprises:

[0040] Step S101: forging a zirconium alloy ingot with a preset size and a preset weight after heat preservation to obtain a forged slab with a first preset thickness;

[0041] Step S102: performing heat treatment on the forged slab;

[0042] Step S103: performing the first surface treatment on the heat-treated forged slab;

[0043] Step S104: Forging the forged slab after the first surface treatment after heat preservation to obtain a primary slab with a second preset thickness;

[0044] Step S105: performing a second surface treatment on the primary slab;

[0045] Step S106: heat-retaining the primary slab after the second surface treatment, and performing multi-pass hot rolling to obtain an intermediate slab with a third preset thick...

Embodiment 1

[0106] In this example, a Zr-4 alloy ingot with a diameter of 700 mm and a weight of 4 tons with uniform composition was used as a processing raw material to prepare a zirconium alloy hot-rolled sheet, the preparation method comprising:

[0107] S201, firstly clean the surface of the Zr-4 alloy ingot, heat it at 1050° C. for 180 minutes, and then forge to obtain a Zr-4 alloy slab with a thickness of 110 mm.

[0108] The chemical composition of the Zr-4 alloy ingot is shown in Table 1 below.

[0109] Table 1 Zr-4 alloy ingot chemical composition

[0110]

[0111] S202, under the temperature condition of 1030-1050°C, heat the forged Zr-4 alloy slab for 60-90min, and then transfer it to a quenching medium with a temperature of 30°C for quenching;

[0112] Among them, the transfer time is 45s, and the residence time of the Zr-4 alloy slab in the quenching medium is 25min;

[0113] The quenching medium is ordinary tap water;

[0114] S203, planing and milling the surface of t...

Embodiment 2

[0139] In this embodiment, a Zr-Sn-Nb alloy ingot with a diameter of 700 mm and a weight of 4 tons with uniform composition was used as a processing raw material to prepare a zirconium alloy hot-rolled plate. The preparation method includes:

[0140] S301, firstly clean the surface of the Zr-Sn-Nb alloy ingot, heat it at 1070° C. for 180 minutes, and then forge to obtain a Zr-Sn-Nb alloy slab with a thickness of 120 mm.

[0141] The chemical composition of the Zr-Sn-Nb alloy ingot is shown in Table 4 below.

[0142] Table 4 Zr-Sn-Nb alloy ingot chemical composition

[0143]

[0144] S302. Heat the forged Zr-Sn-Nb alloy slab for 120-180 minutes at a temperature of 1030-1050° C., and then transfer it to a quenching medium at a temperature of 28° C. for quenching;

[0145] Among them, the transfer time is 45s, and the residence time of the Zr-Sn-Nb alloy slab in the quenching medium is 25min;

[0146] The quenching medium is ordinary tap water;

[0147] S303, planing and mi...

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Abstract

The embodiment of the invention discloses a preparing method of a zirconium alloy hot rolled plate. The method comprises the steps that zirconium alloy casting ingots with the preset size and the preset weight are subjected to heat preservation and then subjected to forging, heat treatment, primary surface treatment, forging after heat preservation, secondary surface treatment, multi-pass hot rolling and vacuum annealing. The manufactured zirconium alloy hot rolled medium and thick plate has the excellent anti-corrosion property and mechanical property, and has the uniform and fine structure,and the plate meets the technical standard requirement of zirconium alloy medium and thick plates for a nuclear reactor. The method is simple in process, flow in preparing flow, and low in productioncost. The situation that domestic high-property zirconium alloy medium and thick plates are dependent on import for a long time can be expected to be changed.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to a preparation method of a zirconium alloy hot-rolled plate. Background technique [0002] Zirconium and zirconium alloys are widely used as structural materials for nuclear reactor cores due to their excellent nuclear properties, good comprehensive mechanical properties, good pressure forming properties, welding properties, and high temperature and high pressure water vapor corrosion resistance. [0003] Most of the zirconium alloy plates produced independently in China are thin plates with a thickness less than or equal to 5mm, and the current production technology is relatively mature. However, for the production of zirconium alloy hot-rolled medium-thick plates with a thickness of 6-12mm, there is a common problem of abnormally coarse grains in the microstructure of the plate, which will cause a sharp decline in the corrosion resistance and mechanical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B37/74B21J5/00B21K29/00C22F1/18
CPCB21B3/00B21B37/74B21J5/002B21K29/00C22F1/002C22F1/186
Inventor 胡旭坤高博李献军赵林科徐滨马倩李小影
Owner 国核宝钛锆业股份公司
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