Micro-alloyed steel components are used in automotive industry for the necessity to make the manufacturing process cycles shorter when compared to conventional steel by eliminating heat treatment cycles, so an important saving of costs and energy can be reached by reducing the number of operations. Microalloying elements like vanadium, niobium or titanium have been added to medium carbon steels...

It has been clarified that deformation and annealing of martensite starting structure can produce ultrafine-grained structure in low carbon steel.  This study aims to investigate the texture evolution and mechanical properties of samples with martensite structure deformed by two different forging processes. The martensitic steel samples were forged by plane strain compression and multi-directio...

This paper analyzes three typical mechanisms of heavy forging robot grippers: pulling with a sliding block including shortand long-leveraged grippers and pushing leveraged grippers, and uses multi-objective evolutionary genetic algorithm to design the optimal forging robot grippers. The decision variables are defined according to the geometrical dimensions of the heavy grippers, and four object...

Studies that examine spatial character-istics of urban unemployment are oftenbased on some simplistic and problematicmeasures of employment accessibility. Thispaper presents a refined methodologicalframework for measuring accessibility,which enables the researcher to (1) improvethe measurement by accounting for job com-petition among workers commuting by dif-...

During the long-term operation, mallets of the forging hammers are exposed to thermal fatigue due to the cyclic temperature changes and impact loads. Taking into account very high price, and a risk of buying frequently the new parts, the necessity of their reparation becomes obvious. The forging hammer mallet (Figure 1), is primarily exposed to the impact compressive loads, and partially also t...

In this paper, a multi-objective optimization strategy of production process parameters based on the neural network and genetic algorithm is proposed with an automotive scroll disk as research object. The forging forming numerically simulated by Deform-3D finite element software, billet temperature, die speed variables, load, residual stress, deformation indicators. nonlinear mapping relationsh...

Why should wait for some days to get or receive the asian digital libraries looking back 10 years and forging new frontiers 10th international conferen book that you order? Why should you take it if you can get the faster one? You can find the same book that you order right here. This is it the book that you can receive directly after purchasing. This asian digital libraries looking back 10 yea...

Date Received: 25 September, 1997 Accepted: 12 December, 1997 Introduction Before I expose my subject, I would like to pay tribute to the memory of Dr. Brock Chisholm, first Director-General of the World Health Organization, whose memory inspired the establishment of this lecture. Those who did so obviously hoped to create a chain of inspiration leading from the root of the Organization into th...