Effect of anti-wear additive on cutting tool and surface layer of workpiece state under MQCL conditions

Abstract

Original scientific paperThe work presents the results of investigation of the influence of anti-wear additive Crodafos EHA-LQ-(MH) added to the emulsion mist on the condition of machined surface of 1.4310 stainless steel after turning. The investigation included the comparison of the following cutting conditions: dry machining, cooling by the MQCL method and cooling by the MQCL method with Crodafos EHA-LQ-(MH). In the paper, the influence of the Anti-Wear (AW) additive on the roughness parameter Ra of the machined surface for various cutting speeds, vc, and mass flow of the emulsion E has been shown. It was found that the MQCL+AW method decreases the Ra parameter values by 14 % to 35 % in comparison with dry cutting and by 17 % in comparison with MQCL method.The machined material and the rake face of the cutting wedge have been subjected to micro X-ray spectroanalysis. Chemical analysis of the cutting wedge and the surface layer of the machined material has been performed. The results show that water dropletts in MQCL method are very good transport facility for active compounds of AW additive that consequently form the dry-film lubricant on the machined surface. Utjecaj dodatka protiv trošenja emulziji na stanje reznog alata i površine obratka u MQCL uvjetima obradeIzvorni znanstveni članak Rad prikazuje rezultate istraživanja utjecaja dodatka emulziji radi manjeg trošenja reznog alata oznake Crodafos EHA-LQ-(MH) na stanje obrađene površine korozijski postojanog čelika 1.4310 nakon tokarenja. Istraživanje sadrži usporedbu sljedećih uvjeta obrade: suha obrada, hlađenje MQCL metodom i hlađenje MQCL metodom s aditivom Crodafos EHA-LQ-(MH). U radu se prikazuje utjecaj AW dodatka emulziji na hrapavost obrađene površine mjeren parametrom Ra pri različitim brzinama rezanja vc i masenim protocima emulzije E. Ustanovljeno je da se MQCL+AW metodom smanjuju vrijednosti Ra parametra za 14 % do 35 % u usporedbi sa suhom obradom i za 17 % u usporedbi s MQCL metodom. Obrađena površina obratka i stražnja površina alata snimana je mikro X-zračenjem i provedena je spektroanaliza. Provedena je i kemijska analiza rezne oštrice i površinskih slojeva obrađene površine. Rezultati pokazuju da su vodene kapljice u MQCL metodi vrlo dobro transportno sredstvo aktivnih sastojaka AW aditiva koje stvaraju suhi sloj maziva na obrađenoj površini.Ključne riječi: dodatci protiv trošenja; hrapavost; korozijski postojani čelik; MQCL (minimalna količina rashladnog podmazivanja); tokarenje