Unlock instant, AI-driven research and patent intelligence for your innovation.

Zr-Sn-Fe-Cr intermediate alloy of zirconium alloy for nuclear reactor and preparation process

A zr-sn-fe-cr, nuclear reactor technology, applied in the field of alloy manufacturing, can solve the problems of partial tin, difficult to control the addition of tin elements, low qualification rate of alloy smelting, etc., to prevent tin loss, accurate and stable element composition , the effect of preventing volatilization

Inactive Publication Date: 2012-08-01
宝鸡市嘉诚稀有金属材料有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The zirconium alloy specially used for the manufacture of zirconium alloy tubes for heat exchangers in nuclear reactors contains Zr, Sn, Fe and other elements. In the smelting of zirconium alloys, various elements are generally added directly. However, due to the low melting point of the element Sn, it is directly Addition often leads to partial tin, which makes it difficult to control the amount of tin added, resulting in a very low pass rate of alloy smelting, generally only about 30%.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zr-Sn-Fe-Cr intermediate alloy of zirconium alloy for nuclear reactor and preparation process
  • Zr-Sn-Fe-Cr intermediate alloy of zirconium alloy for nuclear reactor and preparation process
  • Zr-Sn-Fe-Cr intermediate alloy of zirconium alloy for nuclear reactor and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] 1. Nominal composition of master alloy: Zr-33Sn-4.6Fe-2.3Cr

[0010] 2. The chemical composition is shown in the table below:

[0011]

[0012] 3. Production process:

[0013] 3.1 Proportion: Zr-35Sn-4.55Fe-2.55Cr Proportion weighing 100g

[0014] Zr adopts atomic level zirconium sponge, Sn adopts "0" grade tin shavings and 0.5mm thick Sn belt, Fe adopts pure Fe powder, Fe≥99.9% Cr adopts pure Cr powder Cr≥99.6% and weighs 100g for batching, of which Sponge zirconium: 57.9g, Sn chips plus Sn tape: 35g, Fe powder: 4.55g Cr powder: 2.55g, weigh and wrap it with Sn tape to make a pellet weighing 100g. 3.2 Vacuum plasma argon arc melting for the first time

[0015] Put 50 small alloy balls wrapped with Sn tape into the vacuum chamber each time, evacuate to below 1Pa, use vacuum plasma argon arc welding machine to melt the alloy balls one by one, melt until completely liquid, and then peel off the shell after solidification and continue to smelt , melting current 250~...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a Zr-Sn-Fe-Cr intermediate alloy of a zirconium alloy for nuclear reactor and preparation process, which is added in the zirconium alloy smelting to ensure the content of each element to be stable and accurate. The preparation process of the alloy comprises dosing according to the ratio-vacuum plasma argon arc primary smelting-suspended furnace smelting-ingot casting and turning-analysis-entering warehouses. Due to the fact that the intermediate alloy is added into the smelting of the zirconium alloy, each element component is ensured to be accurate and stable. Simultaneously, vacuum plasma argon arc primary smelting is adopted, because a tin element has a low melting point, the process enables the metals to be primarily alloyed, and the volatilization of the tin element is avoided.

Description

technical field [0001] The invention belongs to the technical field of alloy manufacture, in particular to the manufacture of intermediate alloys in the smelting process of zirconium alloys used in nuclear reactors. Background technique [0002] The zirconium alloy specially used for the manufacture of zirconium alloy tubes for heat exchangers in nuclear reactors contains Zr, Sn, Fe and other elements. In the smelting of zirconium alloys, various elements are generally added directly. However, due to the low melting point of the element Sn, it is directly Addition often leads to partial tin, which makes it difficult to control the amount of tin added, resulting in a very low pass rate of alloy smelting, generally only about 30%. Contents of the invention [0003] The object of the present invention is to provide a Zr-Sn-Fe-Cr master alloy of a zirconium alloy used in nuclear reactors, which can ensure stable and accurate content of each element when added in zirconium allo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22C1/02C22C1/03
Inventor 郑杰张金波
Owner 宝鸡市嘉诚稀有金属材料有限公司