Casting Surface of AZ91 Alloy and Its Reaction with Sand Mold

Enhancing Surface Roughness of Castings When Sand-resin Mold Casting

T. Kovalyova, E. Eremin, S. Arinova, I. Medvedeva, A. Dostayeva, Karaganda State Technical University, Karaganda, Kazakhstan, Omsk State Technical University, Russia. In this connection, studies aimed at improving the obtaining process of high-quality castings of mining equipment are relevant. At the same time there is a need for studying physical and mechanical relationship of mixes in which a...

Sand Mold Press Casting with Metal Pressure Control System

Reaction of cobalt-chromium casting alloy with investment.

REACTION DE ALLIGATO FUSIONAL DE COBALT E CHROMO CON INVESTIMENTO.-Alterationes chimic occurrente intra le investimento ligate a phosphate durante le prisa e le cocer esseva determinate per technicas a diffraction de radios X. Es postulate le occurrentia de certe reactiones durante le processo. Tests del resistentia al compression effectuate a varie temperatures corroborava ille postulates. Ess...

The Effect of Dewaxing and Burnout Temperature in Block Mold Process for Copper Alloy Casting

The main objective of this research is to investigate the effect of dewaxing and burnout temperature on the quality of copper alloy casting produced by a low cost block mold that has been developed. In the molding process, two types of silica sand which contains 97.9% silica (SiO2) and 97.2% silica have been used as a refractory material with POP served as a binder. Several mold formulations co...

validation of a revised logical-mathematical intelligence scale and exploring its relationship with english language proficiency

نظریه هوش چندگانه قسمتهای متفاوت هوش بشری را مورد بررسی قرار می دهد که با شناخت آن شخص به درک بهتری از توانایی های خود میرسد و در نتیجه سعی در استفاده از آن جهت یادگیری بهتر میکند. همچنین با شناخت استعداد دانش آموزان، فرایند یادگیری بهتر میشود. هدف از انجام دادن این تحقیق بررسی رابطه بین هوش ریاضی و استعداد یادگیری زبان انگلیسی میباشد. برای انجام این تحقیق از پرسشنامه هوش ریاضی که توسط شیرر در ...