Erosion problem in tool steel using cold box core-making process

论文摘要

This paper presents the erosion results of the AISI H13 steel impinged by resin-bonded silica sand,using a testing rig that closely simulates the real blowing conditions during industrial core-making. Steel specimens were heat treated to obtain hardness of 294,445 and 595 HV200（29,45 and 55 HRC）. Erosion tests were carried out at impingement angles from 20° to 90° and air drag pressures of 1.38,2.07 and 2.76 bar（20,30 and 40 psi）. The main results are summarized as follows:（i） The harder material,the lower erosion;（ii） the maximum erosion rate is at 30°;（iii） Little difference in erosion rate at impact angle of 60° and 90° for a constant pressure tested regardless of the hardness level;（iv） As the pressure increases,so does the erosion rate,being more sensitive for low impact angles. Finally,a differential form of the general erosion equation is applied on a practical core-making case to evaluate the erosion rate of the H13 steel at 30° and 90° impingement angles.

论文目录

• 1 Experimental
•   1.1 Materials
•   1.2 Experimental variables
•   1.3 Testing conditions
• 2 Results and discussion
•   2.1 Erosion plots
•     2.1.1 Effect of hardness
•     2.1.2 Effect of impact angle
•     2.1.3 Effect of pressure
•   2.2 Morphologies of eroded surfaces
•   2.3 Comparison with no resin-coated sand system
•   2.4 Predictive equation to calculate mass loss of core box
•     2.4.1 Differential form of erosion equation
• 3 Conclusions

文章来源

类型: 期刊论文

作者: Eduardo Rodríguez,Alberto Pérez,Rafael David Mercado-Solis,Velasco-Téllez Abraham,Omar Jiménez,Martín Flores,Marco Aurelio González,Jesús Ibarra

来源: China Foundry 2019年03期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: Universidad de Guadalajara,Departamento de Ingeniería de Proyectos/CUCEI

基金: financially supported by NEMAK S.A. and Industria Meccanica Bassi Luigi&Co

分类号: TG142.45;TG172

页码: 204-210

总页数: 7

文件大小: 825K

下载量: 7