空心抽油杆成形及热处理工艺的模拟计算和试验研究

发布时间：2018-03-05 04:02

  本文选题：空心抽油杆　切入点：镦锻成形　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：空心抽油杆作为一种新型的抽油杆,由于其独特的结构形式和功能,已经成为边际、难动用等油田开发过程中的一种重要装备。本文采用CAE模拟技术,对比分析手段和材料性能测试等方法,系统的研究了镦锻式空心抽油杆的成形及其热处理工艺。着重分析了CAE模拟镦锻式空心抽油杆的成形过程中温度、锻造力和成形尺寸之间的关系,并且重点分析了镦锻式空心抽油杆热处理过程中,工艺参数、组织、性能之间的关系。研究结果表明:以20CrMo为原材料,采用整体镦锻式的结构形式和加工方法,可以制造出具有较高性价比的空心抽油杆。采用一次聚料、二次成形等锻造过程设计,镦锻式空心抽油杆杆头在模具初始温度为300℃、原材料锻造温度在950~1150℃之间、成形力不小于2.01×105N时,第一次聚料可以达到原材料1.5倍壁厚的要求,并且聚料效果良好;锻造温度在930~1050℃之间,成形力不小于1.6×105N,终锻成形可以达到杆头的设计要求。采用一次聚料、二次成形等锻造过程设计,镦锻式空心抽油杆接箍在模具初始温度为300℃、原材料锻造温度在914~1110℃之间、成形力不小于2.01×105N时,第一次聚料可以达到原材料1.5倍壁厚的要求,并且聚料效果良好;锻造温度在995~1130℃之间,成形力不小于2.54×105N,终锻成形可以达到接箍的设计要求。现场试验表明,采用加热温度为880℃,保温时间为68min,20℃水冷的淬火处理,配合550℃加热,保温120min,空冷的回火处理,可以得到细小、均匀分布的回火索氏体组织,各项力学性能指标达到SY/5550-2012《空心抽油杆》的要求,能够满足油田用空心抽油杆的要求。
[Abstract]:As a new type of sucker rod, hollow sucker rod has become an important equipment in the process of oilfield development, such as marginal and difficult to use, because of its unique structure and function. This paper adopts CAE simulation technology. The forming and heat treatment process of upsetting hollow sucker rod are systematically studied by comparing the means of analysis and testing of material properties. The temperature of forming process of CAE simulation upsetting type hollow sucker rod is analyzed emphatically. The relationship between forging force and forming size is analyzed, and the relationship between process parameters, microstructure and properties of upsetting hollow sucker rod during heat treatment is analyzed. The results show that 20CrMo is used as raw material. The hollow sucker rod with high performance and price ratio can be manufactured by using the structural form and processing method of whole upsetting type. The upsetting type hollow sucker rod head can be designed in the initial temperature of 300 鈩，

本文编号：1568633