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柴油加氢循环20碳钢管道脆性爆裂原因
          
Brittle Bursting Cause of 20 Carbon Steel Pipe of Diesel Hydrogenation Recycling

摘    要
某化工厂柴油加氢循环20碳钢管道发生脆性爆裂。对该管道残片分别进行去应力退火处理和去氢处理,通过与未处理原始状态残片的显微组织和力学性能进行对比,并结合化学成分检测和断口形貌观察等方法对管道爆裂原因进行了分析。结果表明:管道材料在长时间服役后发生应变时效脆化,导致管道脆性爆裂;管道材料的氮元素含量相对偏高,且晶粒出现较大的变形,是发生应变时效脆化的主要原因。
标    签 应变时效脆化   失效分析   小试样测试   柴油加氢循环管道   strain-age embrittlement   failure analysis   small sample testing   diesel hydrogenation recycling pipe  
 
Abstract
Brittle bursting occurred in 20 carbon steel pipe of diesel hydrogenation recycling in a chemical plant. The pipe debris was treated by stress relief annealing and dehydrogenation treatment, respectively. By comparing the microstructure and mechanical properties of the treated debris with those of the untreated original debris, as well as combination with chemical composition detection and fracture morphology observation, the cause of the pipe bursting was analyzed. The results show that strain-age embrittlement occurred in the pipe material after a long period of service, leading to brittle bursting of the pipe. The relatively high nitrogen content in the pipe material and the large deformation of the grains were the main reasons for strain-age embrittlement.

中图分类号 TG142.1+5   DOI 10.11973/jxgccl202308016

 
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所属栏目 失效分析

基金项目 国家磁约束核聚变能发展研究专项项目(2022YFE03120000)

收稿日期 2022/4/5

修改稿日期 2023/5/16

网络出版日期

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联系人作者关凯书

备注王明(1998-),男,湖北邯郸人,硕士研究生

引用该论文: WANG Ming,WANG Qiongqi,ZHONG Jiru,GUAN Kaishu. Brittle Bursting Cause of 20 Carbon Steel Pipe of Diesel Hydrogenation Recycling[J]. Materials for mechancial engineering, 2023, 47(8): 100~105
王明,王琼琦,钟继如,关凯书. 柴油加氢循环20碳钢管道脆性爆裂原因[J]. 机械工程材料, 2023, 47(8): 100~105


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