Influence of Machining Parameters on Surface Roughness in Chemical Machining of Stainless Steel 304

Abstract

Chemical machining is a well-known nontraditional machining process and is the controlled chemical dissolution of the machined work piece material by contact with a strong acidic or alkaline chemical reagent. It is also called as chemical etching. The present work is aimed at studying the effect of machining time, machining temperature, etching solution concentration on the surface finish of stainless steel 304 using mixed of acids (HCL+HNO3+HF+ H2SO4+H2O). Alloy samples are of (33×33×6) mm dimensions. Three machining temperatures (45, 50 and 55 ºC) for each of which three machining times (3, 6, and 9 min) were used as machining conditions. Surface roughness increases with the machining temperature and machining time. An assessment of CHM was achieved by empirical models for selecting the appropriate machining conditions of the required surface finish. The models were designed based on multiple regression method via Mtb 16 software. ‫الكيميائي‬ ‫التشغيل‬ ‫في‬ ‫السطح‬ ‫خشونة‬ ‫على‬ ‫التشغيل‬ ‫عوامل‬ ‫تأثير‬ ‫الخالصة‬ : ‫قطعة‬ ‫لتشغيل‬ ‫عليھا‬ ‫مسيطر‬ ‫كيميائية‬ ‫عملية‬ ‫وھي‬ ,‫الالتقليدية‬ ‫التشغيل‬ ‫عمليات‬ ‫طرق‬ ‫احد‬ ‫الكيميائي‬ ‫التشغيل‬ ‫يعد‬ ‫من‬ ‫الغرض‬ .‫الكيميائي‬ ‫بالحفر‬ ‫ايضا‬ ‫وتسمى‬ ,‫قلوية‬ ‫كيميائية‬ ‫محاليل‬ ‫او‬ ‫قوية‬ ‫حوامض‬ ‫مع‬ ‫التماس‬ ‫بواسطة‬ ‫معدنية‬ ‫التشغي‬ ‫حرارة‬ ‫درجة‬ , ‫التشغيل‬ ‫زمن‬ ‫تاثير‬ ‫دراسة‬ ‫ھو‬ ‫البحث‬ ‫ھذا‬ ‫االنھاء‬ ‫عملية‬ ‫على‬ ‫المستخدم‬ ‫المحلول‬ ‫وتركيز‬ ‫ل‬ ‫للصدأ‬ ‫مقاوم‬ ‫لمعدن‬ ‫السطحي‬ 304) ‫مختلطة‬ ‫محاليل‬ ‫بأستخدام‬ HCL+HNO3+HF+ H2so4+H2O. (‫ابعاد‬ ‫تمتلك‬ ‫العينات‬ (33×33×6) mm ‫الحراة‬ ‫درجات‬ ‫من‬ ‫انماط‬ ‫ثالث‬ ‫مع‬ (45, 50 and 55) ‫م‬ º ‫ازمان‬ ‫عند‬ ‫مختلفة‬ ‫تشغيل‬ (3, 6, and 9 min) ‫مع‬ ‫يزداد‬ ‫السطحي‬ ‫االنھاء‬ ‫ان‬ ‫الدراسة‬ ‫بينت‬ .‫للقطع‬ ‫كشروط‬ ‫تستخدم‬ ‫حيث‬ ‫شروط‬ ‫الختيار‬ ‫تجريبية‬ ‫نماذج‬ ‫خالل‬ ‫من‬ ‫للعملية‬ ‫تقييما‬ ‫تحقق‬ ‫وقد‬ ,‫التشغيل‬ ‫وزمن‬ ‫التشغيل‬ ‫حرارة‬ ‫درجة‬ ‫زيادة‬ ‫باستخ‬ ‫المتعدد‬ ‫االنحدار‬ ‫اسلوب‬ ‫اساس‬ ‫على‬ ‫صممت‬ ‫النماذج‬ .‫المطلوب‬ ‫السطحي‬ ‫لالنھاء‬ ‫المثالية‬ ‫التشغيل‬ ‫برنامج‬ ‫دام‬ Mtb 16 .