锻压技术

耐高温镍基合金管件制备工艺及组织性能

英文标题：Preparation process and microstructure properties of high-temperature resistant nickel-based alloy pipe fittings

作者：杜占江1 2 丛相州1 2 孙立明1 2 彭先宽1 2

单位：1.北京国电富通科技发展有限责任公司 2.南瑞集团有限公司（国网电力科学研究院）有限公司

分类号：TG319

出版年,卷(期):页码：2024,49(8):67-72

摘要：

为了探索新型耐高温镍基合金材料的管件生产工艺及其材料特性，以C-HRA-1耐高温镍基合金为原材料试制了Φ89 mm×20 mm的热压弯头和弯管，检测材料的化学成分，通过数值模拟初步确定了作用力大小和成形工艺，测量了材料的声速，用以壁厚的后续测量，制定了热处理工艺，对比了固溶态及固溶+时效态的原材料和弯头的各项数据。结果表明，材料外观、力学性能、硬度、金相、无损检测等各项检测指标均符合设计技术要求。批量生产结果表明：热压前加热温度应为1100 ℃左右，出炉尽量迅速，控制温度下降尽量小；固溶处理温度应为1140 ℃左右，时效处理温度建议为800 ℃左右；保温时间根据管件的外形大小、壁厚等尺寸确定，入水冷却尽量迅速。

In order to explore the production process and material properties for pipe fittings of new high-temperature resistant nickel-based alloy materials,taking C-HRA-1 high-temperature resistant nickel-based alloy as the raw material, the hot pressed elbows and bent pipe with a diameter of Φ89 mm× 20 mm were trial produced, and the chemical composition of the material was tested. Then, the applied force and forming process were preliminarily determined by numerical simulation, and the sound velocity of the material was measured for the subsequent measurement of wall thickness. Furthermore, the heat treatment process was formulated, and the various data of raw material and elbow in solid solution state and solid solution+aging state were compared. The results show that the appearance, mechanical properties, hardness, metallography and non-destructive testing indicators of the material meet the designed technical requirements. The results of mass production indicate that the heating temperature before hot pressing is around 1100 ℃, and the furnace is taken out as quickly as possible to control the temperature drop as little as possible. The solution treatment temperature is about 1140 ℃, and the aging treatment temperature is about 800 ℃. The insulation time is determined based on the external size, wall thickness and other dimensions of the pipe fittings, and the water cooling is conducted as quickly as possible.

基金项目：

作者简介：杜占江(1988-)，男，硕士，高级工程师 E-mail：dzjtianjin@126.com

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