Manufacturing Defects and Control of Centrifugal Casting Double Metal Composite Pipe

Wang Donglin; Wu Jinhui; Cai Bin; Li Fuqiang; Wang Zhipeng; Li Anqiang; Wang Wenjia

doi:10.15980/j.tzzz.2018.03.016

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Manufacturing Defects and Control of Centrifugal Casting Double Metal Composite Pipe
Vol. 38, Issue 3, Pages: 288-290(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.03.016

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[1]王冬林,吴金辉,蔡彬,李富强,王志鹏,李安强,王文嘉.离心铸造双金属复合管缺陷及控制[J].特种铸造及有色合金,2018,38(03):288-290.

Wang Donglin, Wu Jinhui, Cai Bin, et al. Manufacturing Defects and Control of Centrifugal Casting Double Metal Composite Pipe. [J]. Special Casting & Nonferrous Alloys 38(3):288-290(2018)
[1]王冬林,吴金辉,蔡彬,李富强,王志鹏,李安强,王文嘉.离心铸造双金属复合管缺陷及控制[J].特种铸造及有色合金,2018,38(03):288-290. DOI： 10.15980/j.tzzz.2018.03.016.

Wang Donglin, Wu Jinhui, Cai Bin, et al. Manufacturing Defects and Control of Centrifugal Casting Double Metal Composite Pipe. [J]. Special Casting & Nonferrous Alloys 38(3):288-290(2018) DOI： 10.15980/j.tzzz.2018.03.016.

摘要

介绍了碳钢/镍基合金双金属复合管的生产工艺及其金相组织和化学成分

对离心浇注、热挤压、热处理等过程出现的缺陷进行分析。结果表明

转速控制在950

050r/min之间

管坯厚度不均匀性大为降低

而裂纹缺陷基本消除;热挤压时

在加热温度为1 180℃

模具预热温度为460℃、挤压力为35 MN、挤压速度为65 mm/s、挤压比为6.4、采用进口专用玻璃粉润滑剂

可避免复合管内表面凹坑和裂纹;在910℃×90min处理后油冷

然后在650℃×150min空冷后所得复合管力学性能满足技术要求。

Abstract

Production process

microstructure and chemical composition of the double metal composite pipe were introduced

and defects in the double-metal composite pipe were analyzed during centrifugal casting

hot extrusion

heat treatment process.The results reveal that by controlling rotary velocity in950

050 r/min

thick-heterogeneity of pipe-blank is decreased greatly

and crack is basically eliminated.Concave and crack in inner surface of composite pipe can be eliminated with heating at 1 180℃and preheating mold at 460 ℃ as well as squeezing force of 35 MN

squeezing velocity of 65 mm/s

squeezing ratio of 6.4 and the imported special glass powder lubricant.With quenching at 910 ℃ for 90 min and oil cooling+tempering at 650℃for 150 min and air cooling

mechanical properties of the composite pipe can meet technological requirement.