用于注射成形钛合金烧结炉温度标定的测温环及方法

By using injection-molded CP-Ti spherical powder to prepare temperature sensing rings, the problems of uneven density and vacuum deviation in the titanium alloy sintering process of oxide ceramic temperature sensing rings were solved, achieving higher-precision temperature calibration and stable mass production.

CN117182077BActive Publication Date: 2026-07-17CHANGZHOU GIAN TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGZHOU GIAN TECH
Filing Date
2023-08-29
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing oxide ceramic temperature measuring rings suffer from uneven density due to powder filling and friction during the titanium alloy sintering process, affecting measurement accuracy. Furthermore, they exhibit significant deviations when used in vacuum or inert atmospheres, failing to meet the needs of mass production.

Method used

Temperature measuring rings were prepared using CP-Ti spherical powder with feed injection molding and binder, with a particle size of 10~50μm. The uniformity of green body density was ensured by injection molding technology. Calibration was performed under vacuum or inert atmosphere, and degreasing was carried out using oxalic acid medium. The sintering temperature was within the range of 1000~1300℃.

Benefits of technology

It improves the accuracy and reliability of temperature calibration, is suitable for mass production, reduces measurement errors, ensures the controllability of sintering shrinkage due to density uniformity, is suitable for calibration under vacuum or inert atmosphere, and enhances the stability of titanium alloy production.

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Abstract

本发明涉及一种用于注射成形钛合金烧结炉温度标定的测温环及方法，其中测温环包括由喂料注射成形的生坯脱脂而成的脱脂坯；喂料包括CP‑Ti球形粉末与粘接剂；球形粉末粒径为10～50μm；所述CP‑Ti粉末杂质元素质量百分比符合C<0.2％，O<0.4％，N<0.1％，其它<1.0％。其中标定方法包括以下步骤：S1、制备上述测温环；S2、将测温环放到在待标定的烧结炉中进行烧结；且每隔一定温度进行测温环的烧结尺寸测量，并与注射模具尺寸对照，计算烧结收缩率；S3、将脱脂坯的实际收缩率与待标定的烧结炉的标准收缩曲线对照，并获取偏差值，根据偏差值对待标定的烧结炉进行调整，完成标定。本发明可在真空或惰性气体中标定炉温，更接近金属注射成形实际生产工艺，提高了温度标定的精确性和可靠性。
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