Preparation method for metal alloy test rod

Abstract

The present invention relates to the field of metal alloy test rod production, and provides a metal alloy test rod preparation method. According to the method, a vacuum suction casting device is adopted, wherein a vacuum chamber is filled with high purity argon to achieve pressure P1 of 0.02-0.06 MPa; when a button ingot surface layer is completely melted and a through hole on the bottom of an alloy ingot crucible is sealed through a liquid sealing manner, the vacuum chamber is continuously filled with high purity argon to increase pressure to P2, wherein pressure difference between the P2 and the P1 is 0.01-0.1 MPa; and pressure difference suction casting molding is adopted. The preparation method has the following characteristics that: high cleaning and high efficiency are provided; high uniformity and high accuracy of the components can be achieved; a size of the test rod can be phi 12 mm*120 mm; disadvantages of uniform component, difficult oxygen content control, long period or complex process, and the like of powder metallurgy, mold melting casting, extrusion molding, ingot processing and other test rod preparation methods are overcome; and strict requirements on the ideal alloy test rod by standard sample preparation, alloy design, performance testing, material feeding rod preparation and other processes can be met.

Description

technical field [0001] The invention relates to the field of making metal alloy test rods, in particular to a method for preparing metal alloy test rods with high purity, or highly uniform and high-precision alloy components. Background technique [0002] The preparation of high-purity, high-uniformity and high-precision alloy test rods is an indispensable technical link in the fields of chemical composition analysis, alloy design, machining, powder metallurgy and precision casting, etc. It is mainly used for the preparation of alloy standard samples, Processes such as performance testing and feeding rod preparation. Usually these test bars are prepared in the following three ways: 1. Powder metallurgy method, the prepared test bars generally have high composition uniformity and accuracy, but it is difficult to control the oxygen content and the process cycle is long; 2. Precision casting, the prepared test bars The metallurgical quality of the bar is good and the quantity ...

AI Technical Summary

Problems solved by technology

Usually these test bars are prepared in the following three ways: 1. Powder metallurgy method, the prepared test bars generally have high composition uniformity and accuracy, but it is difficult to control the oxygen content and the process cycle is long; 2. Precision casting, the prepared test bars The metallurgical quality of the bar is good and the quantity is large, but the oxygen content is high, the composition is not uniform and accurate, and the cycle is long; 3. The test bar prepared from the bulk master alloy has good metallurgical quality and a large number, but there is macroscopic component segregation or Segregation, composition deviation between test rods, it is difficult to meet the requirements of high uniformity and high precision

More importantly, these preparation methods have a long production cycle and high cost. Generally, one cycle can only meet the preparation requirements of 2-3 alloys with different compositions. Once the composition is out of tolerance, it is easy to cause huge waste

If it is necessary to design and prepare a dozen or dozens of different components or alloy test bars with slight fluctuations between components, these preparation methods will be overwhelmed

Images