The causes of inner transversal crack of cold-draw heavy wall pipe of 45 steel were analyzed.
针对45钢冷拔厚壁管存在内表面横裂纹问题，分析了其产生的原因。
A completion component fabricated as a short section of heavy wall tubular with a machined internal surface that provides a seal area and a locking profile.
一种完井部件。它是一段厚壁短管，其内表面经过机加工，于是提供了一个密封区域和一个锁紧的型面。
Structural steel products include I-beam fabrication, custom heavy wall tube, pipe, Angle iron, channel, etc. All to meet construction industry specifications.
结构钢产品项目包括I形梁制造和定制厚壁钢管、管材、角钢、通道等。制造的所有产品均符合建筑行业规范。
Experimental study of broaching precision of heavy wall workpiece shows that workpiece aperture turns large in initiative wearing stage of the tool, and the change is fast;
对厚壁件内孔拉削精度进行了试验研究，结果表明：刀具初期磨损阶段，工件孔径尺寸偏大，且变化较快；
The paper is about how to obtain the densified structure of heavy-wall nodular iron castings under the condition of gravity foundry and to introduce the authors research in this area in detail.
针对日益开始清晰的厚壁球铁件凝固特性，提出了获得其致密组织的较为系统的工艺设计思想；以作者主持完成的典型的生产实例验证了控制方法的有效性，并在此基础上讨论了控制方法的拓展途径。
A new process of such kind similar to superplastic deformation was proposed and hen put into production of heavy-wall stainless steel elbow successfully.
提出了一种近似超塑变形的扩径推弯成型方法，并成功地用于厚壁不锈钢弯头的生产。
A new process of such kind similar to superplastic deformation was proposed and hen put into production of heavy-wall stainless steel elbow successfully.
提出了一种近似超塑变形的扩径推弯成型方法，并成功地用于厚壁不锈钢弯头的生产。
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