Finite Element and Experimental Analysis of Closure and Contact Bonding of Pores During Hot Rolling of Steel

被引：11

作者：

Joo, Soo-Hyun ^{[1
]}

Jung, Jaimyun ^{[1
]}

Chun, Myung Sik ^{[2
]}

Moon, Chang Ho ^{[2
]}

Lee, Sunghak ^{[1
,3
]}

Kim, Hyoung Seop ^{[1
,3
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[2] POSCO, Tech Res Labs, Pohang 790785, South Korea

[3] Pohang Univ Sci & Technol, Ctr Aerosp Mat, Pohang 790784, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 09期

关键词：

VOID CLOSURE; MECHANICAL-PROPERTIES; CASTING DEFECTS; LARGE FORGINGS; PREDICTION; ALLOY; MODEL; IRON;

D O I：

10.1007/s11661-014-2319-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The closure and contact bonding behavior of internal pores in steel slabs during hot rolling was studied using experiments and the finite element method (FEM). Effects of pore size and shape were investigated, and three different cases of pore closure results were observed: no closure, partial closure, and full closure. The FEM results well reproduced various closure events. Bonding strengths of unsuccessfully closed pores, measured by tensile tests, showed critical effects. Also, there was a difference in bonding strengths of several fully closed pores. Fracture surfaces showed that welded regions could be divided into three (not, partially, and perfectly) welded regions. The pressure-time curves obtained from the FEM results indicate that pore surface contact time and deformed surface length are important parameters in pore welding. Pore size, pore shape, time of pressure contact, and deformed surface length should be considered to completely eliminate pores in final products.

引用

页码：4002 / 4011

页数：10

共 33 条

[1] Theoretical and laboratory modelling of the closure of metallurgical defects during forming of a forging [J].