Paper 43: Connection between Surface Quality and Processing

1967 ◽  
Vol 182 (11) ◽  
pp. 46-55
Author(s):  
L. Gribovszki
Keyword(s):  
Heat Treatment ◽  
Surface Quality ◽  
General View ◽  
Surface Layers ◽  
Processing Methods ◽  
Complex Investigation ◽  
Gear Teeth

This paper gives the modern general view of surface quality, and briefly reviews the most important methods of testing the characteristics of the surface layers produced by machining or processing. Methods of determining the remanent stresses are described in detail. After having demonstrated a newly developed method of test, the author discusses the magnitude and distribution of the remanent stresses brought about by the more important variants of heat treatment, surface compaction, machining, and grinding. In conclusion, an effective method is described for the complex investigation of the surface quality of gear teeth.

scholarly journals Improving the Accuracy and Quality of the Surface Layer of Products by Local Magnetic Pulse Processing

2021 ◽  
Vol 346 ◽  
pp. 01029
Author(s):  
Vasily Gritsyuk ◽  
Evgeny Smolentsev ◽  
Dmitriy Krokhin ◽  
Aleksandr Pechagin
Keyword(s):  
Heat Treatment ◽  
Surface Layer ◽  
Mechanical Engineering ◽  
Magnetic Pulse ◽  
Surface Layers ◽  
Processing Methods ◽  
Pulse Processing ◽  
Accuracy And Stability

This article discusses development of technological modes and the process of stabilizing the properties of surface layers of large-sized parts, ensuring accuracy and stability of the products’ shape during their manufacture and operation, while using combined processing methods that replace costly heat treatment at mechanical engineering enterprises.

Gradient Structures and Internal Stress Fields in Surface Layers of Products Made of Steel 0.35C-1Cr-1Mn-1Si after Turning

2014 ◽  
Vol 1013 ◽  
pp. 170-175 ◽  
Author(s):  
Aleksandr Smirnov ◽  
Nikolai Ababkov ◽  
Aleksandra Glinka
Keyword(s):  
Heat Treatment ◽  
Internal Stress ◽  
Structural Phase ◽  
Nondestructive Method ◽  
Stress Fields ◽  
Surface Layers ◽  
Acoustic Characteristics ◽  
Phase Condition ◽  
Internal Stress Field

The effect of different cutting (mechanical heat treatment) on the structural-phase condition and the internal stress field in the surface layers of the product is considered in the article. The regularities of acoustic characteristics depending on the parameters of the structure and stress for the development of nondestructive method for assessing the quality of the surface layer are identified

Mechanical properties, microstructure and surface quality of Al-1.2Mg-0.6Si-0.2Cu alloy after solution heat treatment

Rare Metals ◽  
2015 ◽  
Vol 36 (7) ◽  
pp. 550-555 ◽  
Author(s):  
Li-Zhen Yan ◽  
Yong-An Zhang ◽  
Bai-Qing Xiong ◽  
Xi-Wu Li ◽  
Zhi-Hui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Quality ◽  
Solution Heat Treatment

scholarly journals Effects of thermal treatment before plane sanding on the surface quality of Corymbia citriodora wood

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 2576-2583
Keyword(s):  
Heat Treatment ◽  
Thermal Treatment ◽  
Surface Quality ◽  
Treated Wood ◽  
Average Roughness ◽  
Abrasive Grains ◽  
Surface Finishes ◽  
Heat Treated ◽  
Corymbia Citriodora

Wood sanding is one of the most expensive processes in the woodworking industry, and little is known about the factors that influence the final quality of wooden parts. For this reason, studies involving different wood treatments, such as thermal treatment, have been developed to produce better surface qualities. The objective of this work was to verify the influence of thermal treatment of the wood species Corymbia citriodora before the sanding process on the surface quality of the wood pieces. The surface finishes of the sanded natural and heat-treated wood were compared. Sanding was performed using two sandpaper grades, 80 mesh and 120 mesh, with abrasive grains of aluminum oxide. The sanding process was performed by flat horizontal sanding parallel to the fibers. Six specimens were used for each sandpaper grade. Initially the specimens were heat-treated at 120 °C, 160 °C, and 200 °C for 2 h, and then they were subjected to sanding. For the analysis of the surface quality of the wood pieces, the average roughness was used. From the obtained results, it was concluded that the heat treatment considerably reduced the roughness of the wood for both sandpaper grit sizes, and it facilitated the final finishing of the wood pieces.

Parametric Optimization of Electrochemical Honing of Helical Gears by Response Surface Methodology and Genetic Algorithm

2012 ◽  
Vol 622-623 ◽  
pp. 86-90 ◽  
Author(s):  
J.P. Misra ◽  
P.K. Jain ◽  
D.K. Dwivedi
Keyword(s):  
Genetic Algorithm ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Surface Quality ◽  
Parametric Optimization ◽  
Helical Gears ◽  
Rotating Speed ◽  
Gear Teeth ◽  
Input Variables

Finishing is crucial for maximizing the service life and overall in-service performance of gears. This paper presents the parametric optimization of Electrochemical Honing (ECH) of helical gears using Response Surface Methodology (RSM) and Genetic Algorithm (GA) to predict the surface quality of gear teeth profile. A three factors three levels Box Behnken Design (BBD) of Response Surface Methodology (RSM) has been designed to investigate and analyze the effects of input variables: voltage, rotating speed and electrolyte concentration on measures of process performances: percentage improvement in average and maximum surface roughness (PIRa / PIRtm) value. Typical ranges of input parameters were investigated and regression models were developed and used respectively as constraints and objective function for parametric optimization using GA. The results established the feasibility of using the process to improve the surface quality of gear teeth profile.

Effect of workpiece heat treatment on surface quality of AWJ kerf

2015 ◽  
Vol 51 (4) ◽  
pp. 345 ◽  
Author(s):  
Michele Monno ◽  
Giuseppe Pellegrini ◽  
Chiara Ravasio
Keyword(s):  
Heat Treatment ◽  
Surface Quality

Analysis of Heat Treatment Quality of a Spring Clip with Failure

2013 ◽  
Vol 395-396 ◽  
pp. 887-890
Author(s):  
Mei Hua Zhu ◽  
Jia Wei Lu ◽  
Ying Xi ◽  
Jin Sen Zhang ◽  
Zhe Chen
Keyword(s):  
Heat Treatment ◽  
Surface Quality ◽  
Fatigue Fracture ◽  
Treatment Method ◽  
Treatment Quality ◽  
Micro Hardness ◽  
Metallographic Structure ◽  
Strength And Durability ◽  
Heat Treatment Method

The fastening is an important part for fastening when laying the rails, which requires sufficient fastening pressure, strength, and durability. This article focuses on the fatigue fracture of the spring clip of a fastening and gets a result that the fracture accounts for alternating twist-bend load by examining macro-fracture. The crack origin is on the surface of the clip where significant decarburization and corrosion exists and its extension makes the clip break by examining metallographic structure and testing micro-hardness. The solution is to improve the heat treatment method and the surface quality avoiding corrosion.

Modification of tundish design to improve quality of slabs, casted at CCM No. 4 of EVRAZ NTMK

2020 ◽  
Vol 76 (6) ◽  
pp. 559-563
Author(s):  
I. M. Zakharov ◽  
V. A. Smirnov ◽  
D. V. Sushnikov ◽  
A. G. Lyzhin ◽  
E. A. Lavrova ◽  
...  
Keyword(s):  
Basic Number ◽  
Metal Level ◽  
Surface Layers ◽  
Secondary Oxidation ◽  
Strip Rolling ◽  
Actual Distribution ◽  
Ultrasonic Control ◽  
Analysis Of Results ◽  
Water Simulation

A technology of continuous casting of steel has a large effect on its contamination. In particular, proper organization of metal flows in tundish and mold is very important. After completion a series of casting through a tundish and drop of metal level in it, it possible, that the slag flows from the surface layers of the tundish to capture the metal. An analysis of results of ultrasonic control of finished strip showed, that the basic number of the revealed defects was obtained during strip rolling out of the last slabs of the last heat in a series for a tundish. Metallographic studies determined, that the defects were located in the slab axis zone and filled by macro-inclusions of complex composition. To determine the actual distribution of metal flows, a water simulation of them was accomplished for the existing design of the EVRAZ NTMK tundish. It was determined, that at the drop of metal level in a tundish, a capture of slag from the metal reservoir and its transfer into the main bath of the tundish takes place due to whirligig flows. Following the weight metal consumption, the zone of slag inclusions distribution enlarges. Besides, denudation of the metal mirror in the metal reservoir takes place, resulted in metal secondary oxidation. Based on the results of the simulation, it was proposed to modify the design of the “turbostop”, which is installed in the metal reservoir of the tundish. Besides, it was proposed to remove the dividers installation in the tundish. It was noted, that the proposed steps enable to ensure a minimal level of rejections.

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