№ 2 (68), 2019
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Contents Summary (English)
News
News from abroad
About the conference “Fasteners. Quality and responsibility-2019”
The exhibition Fastener Fair Stuttgart 2019 gathered a lot of players of the fastener market
Buying fasteners for the Russian enterprises from abroad is unacceptable
An interview by Chief Editor of the magazine with Yuri Medvedev, General Director of the high-strength fasteners plant "Bervel" is given. It is devoted to some issues of development of the Russian production of fasteners.
Fastener production of the Russian immigrants is successfully developing in Brazil
New 3D-printing service from REYHER
Features of the stainless steel fasteners production
A study of the preparation technology of stainless steel for cold forging was carried out. Three versions of the technology for manufacture of hexagonal head bolts, made of stainless steels of austenitic and martensitic classes: without reducing the rod under the thread rolling, with single and double reduction, were studied. All three production options are applied in JSC BelZAN. Cooling lubricants for cold heading of stainless steel have been investigated.
Technology of anti-corrosion thermal diffusion galvanizing, providing the cold resistance of fasteners
The analysis of damage of the steel low-alloy fasteners shows that the use of an anticorrosive thermal diffusion zinc (TDZ) coating is a promising way to protect the metal. It is justified of its use. The authors have conducted tests on the basis of which TDZ can be considered as an universal coating, which provides not only anti-corrosion properties of fasteners, but also its cold resistance.
On the tasks and methods of increasing cold resistance and long-term strength of high-strength bolts of strength classes 10.9 and 12.9 for the northern and arctic regions
The possibility of increasing the cold resistance of high-strength bolts of strength classes 10.9 and 12.9 by introducing a margin of critical temperature relative to the value of T50, determined by the presence of 50% viscous component in the fracture of impact samples, is considered. The possibility of increasing the cold-resistance of steel by grinding grains of ferrite and replacing the plate-type martensite with a rack one is shown. In order to increase the cold resistance of bolted steels, it was proposed to introduce an additional criterion – the presence of a viscous component in the fracture of impact samples, the average proportion of which should be at least 30%. If this condition is not fulfilled, it is necessary to carry out a test for delayed brittle fracture (CRP) or corrosion crack resistance. The role of boron is noted both in increasing the hardenability of steel and in preventing hydrogen segregation along the ferrite grain boundaries. The high resistance of ЗХР steels of 20Х2НМТРБ type is due to the increase in the number of initiators of viscous microcracks-pits and the prevention of boron segregation along the grain boundaries of ferrite and pearlite colonies.
Fixing the bolted connections at high vibration
RIVIT S.r.l.: fasteners and tools
“In which country do you live at all?” or About the results of the survey on the topic of kickbacks
The results of a survey of representatives of the business participants of the St. Petersburg Technical Fair about kickbacks, held on March 13, 2019, are shown. 75 exhibitors and visitors of the exhibition were surveyed – management staff and ordinary employees of enterprises aged from 19 to 70 years.
Let us be in the trend, or Social networks for fasteners
The groups of social networks and the benefits of them are considered. The readers’ attention is drawn to the strategy of placing informational messages and features of the fastener market segment. According to the author, the costs of activities in social networks are necessary and they are investments in the future business development.
From the advice of Jeff Bezos
Here are excerpts from article 12 of “Business Lessons You Can Learn from Amazon Founder and CEO Jeff Bezos” after Zach Bulygo.
Thermal expansion of materials and adhesive bonding
The range of materials used in industry is constantly increasing, and glue is increasingly being used to connect dissimilar materials. Such heterogeneity due to different thermal expansion of the materials being joined can significantly affect the reliability and durability of the adhesive bond. Its assessment is complicated by the fact that it can be tested only on a full-sized adhesive joint. The solutions are proposed in order to avoid the loads, which are critical for the glue line due to various thermal expansion of the joint materials.
Tools for dosing two-component materials
Nordson EFD produces a range of dosing tools for two-component materials. The tools, which are suitable for dispensing viscous liquids, are presented. In addition to the standard repair guns, the company's product range includes the tools with manual, pneumatic and electric drives.
The tools for cable ties installation
The examples of special tools, which allow to tighten the cable tie with the required force, are presented. Their varieties and characteristics are described.
Looking through other editions
Association News
Standardization News
Information from the registry of Technical Certificates
What articles and topics can you find in our magazine?
Calendar of the foreign exhibitions
Calendar of the Russian exhibitions
This issue of the magazine is prepared and published with the support of TK Bolt.Ru, LLC (Russia); Trade firm SK, LLC (Russia); Industrial solutions, LLC (Russia); Rusbolt, LLC (Russia); Nordson RUS, LLC (USA); SACMA Limbiate S.p.A. (Italy); Shanghai Fast-Fix Rivet Corp. (China); Yeswin Machinery Co., Ltd. (Taiwan); Messe Dusseldorf GmbH (Germany); ABM-group, LLC (Russia); Hariton Machinery Company, Inc. (USA); Heico, LLC (Germany); Rivit S.r.l. (Italy).