Experimental studies of the stress state of the surface layer of detailat treatment with submerged jets
Journal: Reporter of the Priazovskyi State Technical University. Section: Technical sciences (Vol.29, No. 1)Publication Date: 2014-12-04
Authors : A.A. Andilahay;
Page : 134-139
Keywords : abrasive blast treatment; the state of stress; microhardness; abrasive grain; work hardening; aging of the metal; etching; shaping the surface layer;
Abstract
In the instrument and electrical industry was the use of the method of abrasive machining submerged jet, which is the most promising method for abrasive blasting of small parts of low stiffness. This method eliminates the main drawback сhip plants - abrasion channel nozzles or injection nozzles, but the state of the surface layer of machined parts are poorly understood and to make maximum use of the potential to provide the required quality parameters. The study of the state of the surfaces of parts resulting from abrasive blasting traditional methods, dedicated work, which define quality indicators: microhardness depth residual stress, as well as their nature (compressive, tensile). However, known from the literature values correspond to the conditions of surface treatment of parts in a fixed state with an abrasive material through the feed nozzle, and therefore the dynamics of the interaction of a single abrasive grain and significantly different parts. The process in question, and different modes of processing characteristics of the abrasive grains. In the paper, a series of experimental studies designed to assess the state of machined surfaces of parts as a result of abrasion submerged jets. It is established that during the treatment the non-oriented disorderly traces overlay the abrasive grains on the treated surface, thereby forming a tight skin layer thickness of 4 - 5 micrometers. Processed surface gets cold working, as evidenced by the study of microhardness before and after abrasive machining in a free state submerged jets
Other Latest Articles
- Investigation of flux-powder wire’s components-stabilizers on welding and technological properties in underwater welding
- The geometry of the strip electrode used in the process of submerged arc hardfacing of continuous casting rolls
- Intensification of the electro slag process exothermic mixtures (fluxеs)
- Heat balance of the rotary kiln for the limestone burning and its analysis
- Influence of the velocity mode upon alternations in ingot’s stressed state
Last modified: 2015-07-23 19:08:07