25 Questions 229 Answers 0 Followers
Questions related from Daniel Martinez Krahmer
Excuse me Sirs. I found a formula possibly called Konig's formula to determine the force in an AWJC process. Is the following: F=0,5*phi*alpha*pressure*dn*dn Where alpha = contraction...
04 July 2022 9,126 0 View
If you have a laser cutting machine that can cut a steel sheet up to 10 mm thick, is it possible to cut a 20 mm steel sheet in two consecutive passes? If the answer is yes or no, why?
23 October 2019 3,310 2 View
Please. I need to know what level of hardness provide a equilibrated behaviour between wear resistance and toughness. Also, if a ionic nitriding treatment reduce the friction factor between the...
21 November 2018 6,959 1 View
Some people say that the risk is bigger when the chip particles size are 500 micrometers or minus? What is the reason of this size?
24 August 2018 2,969 0 View
Hi People. Please, I need to know which is the best material to make the guideline plate in a hot rolling grinding ball machine. Here the is a link to see the...
24 March 2018 9,850 5 View
Hi People. In this moment we made cold compression testing over cylindrical steel bar. Some of you know if exist any paper, any book that analyze the uncertainty sources that affect the geometry...
17 February 2018 1,288 2 View
Hi friends. I need to know your opinion about WHICH and WHY are ALL the parameters that influence the toughness of a steel.
19 December 2017 5,929 3 View
Hi Friends. I need to know which is the methodology to establish the hot forging temperature range for a especific steel. Not all the steel are in the manuals. For this reason, not always people...
18 December 2017 8,982 2 View
Hi People. I need information about how is the influence of phosphorus and sulfur content over steel toughness? Some paper, please?
14 December 2017 4,036 4 View
Hi Peolpe. I need information about hot forging temperature range and also of quenching and tempering temperature range for SAE 1080 steel.
02 December 2017 6,507 1 View
Hi People. I need information about the safety (hand saw break) problems caused by handsaw blades made in High Speed Steel, and also if there is any standard that say that this blades produce more...
04 July 2017 1,301 2 View
I make this question because simulation casting software need this value, and also I know than speed influence over casting defects and mold wear?
22 July 2016 6,710 3 View
Hi People. Recently we make experimental process cooling of a titanium Gr2 tube. The tube dimensions were: external diameter 170mm; internal diameter 65mm and 200mm of heigth. Then, we make an...
21 July 2016 7,595 6 View
Hi people. Wich is the methodology to measure the hardness variation from ambient temperature to high temperature? I know diagrams about it, but I dont know how is possible to draw this?
31 March 2016 4,900 6 View
In steel forging, if the blank is more time at forging temperature in the induction heater, the size of grain increase. So, which are the differences in mechanical properties and microestructure...
17 March 2016 3,213 3 View
Hi People. I need information (an numerical value), about the maximun mechanical resistance of an SAE / AISI H13 tool steel with a hardness of 42-48HRC. I want to compare this value with values...
28 December 2015 10,073 4 View
Hi people. Dr Tomov from Bulgaria has develop a formula to establish if is necessary or not a preforming steps for make a part with hot forging close die process. Someone has resolved cases to...
31 March 2015 4,611 2 View
Someone knows which is the relation between the mechanical strength of flash in hot forging dies and the type of forging steel, the forging temperature, the internal pressure die, the flash shape...
31 March 2015 1,658 0 View
Quality bolts have thread rolling. Is normal use to this bolts steel with 0,2%C alloy with low boron to improve quenchability. The thread rolling is better if the necking obtain in tensile testing...
04 March 2015 1,057 1 View
In hot forging the design of flash is critical. I wonder if is posible to reduce the die cost making some shape of flash than can reduce forging load and die wear?
24 February 2015 980 1 View
There are many papers that study the performance of cutting tools made with high speed steel, with and without cryogenic treatment. But, what type of micro-structural modifications produce the...
14 January 2015 9,682 3 View
The literature says that behaviour can be contractive or expansive. Which is the truth? Will it be possible to control this behaviour? How? What new possibilities to casting does this situation offer?
11 January 2015 6,258 4 View
Ductile iron has good mechanical properties. In some cases pieces made by casting of ductile iron replace forging pieces. What are the reasons to forge a casting piece? What happens to the cost of...
13 December 2014 7,461 3 View
I know that differents shapes for the flash channels exist that designers use in hot forging dies. Can you give me information about this?. Thank you.
27 October 2014 3,091 3 View
Someone can give me an idea about which values are recomendables for cutting speed, and tooth feed for milling UHWMPE polymer when using uncoated solid carbide tools?
01 January 1970 454 1 View
