Modern Steel Products (2015) - lecture 1

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Modern Steel Products (2015) - lecture 1
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1 (2015)
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Cooman, Bruno C. de
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University of Cambridge
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A series of lectures on steels, given by Professor Bruno de Cooman, Graduate Institute of Ferrous Technology (GIFT), POSTECH, Republic of Korea
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but good morning and welcome and sorry about the fact that we
start to build we collect
but let's just start off with a few general thinks about the costs this is the 612 it's a TFT year specially designed courses In the spirit of this Institute of the teaching of steel science and technology yeah
yeah you don't need to purchase a textbook but if you want to purchase a textbook which covers a little bit more all of the material here is a book that you can order from this website here because about 50 dollars but they were students and are it's a book that I wrote together with my colleagues in the US golden chance here at the Colorado School of Mines with nails into a lot of nice still research and it's a book it's basically about the school analogy of steel products that sounds to produce will book a Consolata material you don't have to buy it on but there is a lot of material that overlaps with the book so this is where you can get it well and you cannot order through Internet very easily 50 dollars I the just to make sure that we
meet at the right time so made on Monday and on Wednesday 11 to 12 15 in this in this room of digestive the through building now very important for this course we use a rather special way them of grading the costs rather than having home works and midterms and final exams we have a continuous evaluation of your progress so every Wednesday at the start of the class we have a 15 minute quarters yes the quiz is always the same format it's a it's 10 questions about the last 2 lectures yes and it's it's basically a yes and no or you don't have to write sentences such as there is a very quick to To answer so it's an alternative way of doing things so you don't have to worry spend a lot of time studying just have to rehearse whatever we've seen whether you do well or not it doesn't depend on your skills in English because the answers you have to give which are very simple either numbers or drawing arrows or is those this you English skills I have no impact on on your great and it also allows you to spread out the risk of you know what I'm doing not as well on exams and things like this can now I understand all graduate students so some of you may have to go to conferences or be absent for once then you will you know you may miss a test so everybody has missed 1 test on no questions as if humans to quote the test itself and it's starting to be uncomfortable and you cannot miss 3 tests so if you missed 3 us you have a major problem for console and that's really reasonable I think OK I will also tell you all about 2 cost because of classes starting today we will we will not have a test on on Wednesday this you won't have enough materials will do next Wednesday will start next and you should in total you out there are attending a total of about 10 quizzes maybe 1 for 2 more but it's about 10 quizzes so you in the end you end up answering and you know close to a little over 100 questions related to the cost so it's a very reasonable way of evaluating because right To before I go to work the into the subject itself but we take the course the 10 year and effort after each lecture about within a few hours the lectures should be available on do the class size for you to to watch there's so if I use a few missed a class I know that you can watch it there so that's also to make it easier for you to work too cope with the with the English I write and I think that's the most important yes but please I have a look at the quality of the video if you could last year we had some problem with the sound being not loud enough "quotation mark there was a bit of a problem for the students and looking at the video on the on the EU class the site so please let us know if if if there's a quality problem there all right so let's start about year and another thing where this might mean in this 1 costs but this is not a difficult course because I've gone out of my way to try to avoid mathematics it's 6 but you you do good you get a lot of material and lots of information and it's basically related to products why they are the way they are in terms of a composition why are the way they are in terms of like rastructure I we'll see throughout the course how products foreign steel products are made in as what is important and hopefully you'll go home with a good feeling what the physical maladies of these products without
being a research level expert in any way Of the subject we touched on it's a very it's a technology-oriented costs rather than in academic science focused costs and I know this is a courses vary and I teach it's frequently not only that you have to you but also outdoors to industry professionals to I tried to make it as the relevant to engineering practice as possible so that you know if you want to get a job in the steel industry or in related steel industry you have a good feeling you know what the current the level of technology is with 2 types of steels are that people use and and and what tuition the important issues are in terms of France's quality of 2 material all right so so let's start with the 1st couple of lecturers are very much things you know some of you may be very familiar with others may be less familiar words so just to make sure everybody is it is at the same level in terms of understanding so that you probably familiar because I think most of you are a materials scientists with that the so-called he drowned of materials science where we have basically the instructor structural properties relations only 2 of the .period of interest and the processes by what by which once you obtain the structure and that the the performance of the material in terms of area and and I've used some pictures here which are relevant to steal the Steelers is as such no different from any other material that you have a microscope tour you have some engineering properties of such a strange yes and which can have an impact on the product and the performance of this product for instance in case of a cop and and and these might cost ruptures while you obtained by by process this steel processing is is 1 of the year the things will be discussing in the course of this this these lectures and you can see here and this is the in forging conceded the person standing here isn't a huge forging the and and and and you that we will be be having an impact on the microscope will discuss these things now In practice in real engineering practice this steel science or materials science literally drowned this not exist there's not applied I because there are other things that impact materials so I can and hopefully we'll get a feeling for that also that in the course of the lectures over the letters that you have in you steel science of materials science and technology and new attention he drove becomes an oct he dropped when does it become an up to heated because it to AM other Emmons that play a role the selection of materials and application of that you're 1 of them is cost and if I if I did we would this class we would get together and the challenge would be to build a new car from scratch we would probably and that I would have a lot of very interesting technology 1 of the things we would probably do is we we would build cars the body which the with using aluminum yes it would be so it would be the best way for us to work it would be the cheapest way to go to work it would be the most flexible 1 yes and and we would also have a very nice light car-body yes that's what how we would do it and so well and so wide and so why don't we do it builds cars out of aluminum today well because once you start making mass production of cars and what is mass production mass production is more than 300 thousand cars a year the same group of people would be asked to design a car but we would need to make not 1 yes but we would need to make 300 thousand every year a high-quality vehicles at affordable prices yes we make a still would make us look at the a step that would be the cheapest way to get him to make a call but it but there are other elements that play
a role it is also regulations has and you can make whatever you want yes but if there are some regulations that control the product that you manufacture and the many regulations yes perhaps some of you have already bought a car 1 day or you can buy this car because it satisfies regulations yes you cannot build any car and put it on the road you cannot build any plane and you fly it up in the air there are regulations that govern many things in the life of an engineer you cannot build any building if it doesn't up if you have the wrong building codes out there you know and that and you have to respect of yes so regulations also have a huge impact on materials and you can see if you visit other countries where the regulations are very Wheat you can see things that will shock you yes like people that use bamboo constructions you know when they've built high high-rise buildings you can see it's like it's not normal because you know it's unsafe yes it works very well there's no problem they built by the buildings using bamboo scaffolding everywhere in China yes but you can see there's something wrong about this because it's unsafe yes so if we would just use item if you just look at it that reviewed and say there's nothing wrong with bamboo yes but regulations tell us it's unsafe isn't certain countries you not use your career you cannot build scaffolding with bamboo yes because the regulations tell you you can so the same thing will happen is happening went for instance cars yes if the regulations tell you but you have to have this type of mileage your car has to drive 50 km for every leader or your C O 2 emissions have to be less than 100 grams per kilometer yes and you're still car is too heavy to achieve this your material selection will force you to use other material OK so cost regulations also have impact on the at the material selection and wanted to have an impact on the the design of certain steel can right so for the
1st lectures will just talk about some fundamental concept that we have to repeat because you know we might need to make sure that everybody knows the power of simple things like the Iron carbon phase diagrams things like this so sold to make sure we all have the same understanding of the relationship between Mike restrictions and properties and steals and Michael structure is controlled by thermal cycles and the mechanical cycles and what is very important and steel is what we call the decomposition of Austin because that has transformations in steels are constantly always used to generate specific microscope but the are just have get a few words about new sets of steals steals are still is being produced in huge quantities and the production is there was 1 . 6 billion tons of steals every year it's a material that's very closely connected to the news growth in the economy and society this time you can 1 of the ways in which and you can gage the wealth of a nation is biased looking at how much tons of steel Our are used per inhabitant in that country you that is high that is an advanced lead in advance of the economy Cox News which he cars on the roads everywhere is an important is an important factor of this 1 . 6 billion Thomas of steel we produce about 70 today 70 million Kansas 70 with 6 0 vehicles every year yes and every year we produce 2 . 5 million cars more that the year before you can see this almost linear increase yes and this is certainly going to continue until 20 20 were will go close to 100 million vehicles per year yes so and this is all of this is basically 99 per cent of the cars in Our made out of steel whatever you're being told about aluminum vehicles and magnesium and plastics 99 per cent of the vehicles are stealing based and this is also the only represents but about 5 per cent of the use it's Of this this huge amount of steel yes but it OK when we talk about Steele's also important we talk in this cost about carbon steel yes the cities are very very low alloyed steel steels they make out the bulk of the steel production over 90 5 per cent this it's another steel industry parallel steel industry which is the stainless steel industry which also uh contains special steels industry that's about less than 5 per cent of the the steel production yearly so our costs will focus on this these products yes this thing was for the stainless steels there is a separate courses that is told at GFT all of which you can register for regularly OK now but
it but it but it yet but it yet but it but it yeah yeah yeah yeah yeah you you you yeah but it


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