Here, the total cost of nitrogen is known, but the hourly use cost must be assigned to each piece of atmosphere equipment that used nitrogen for purging. This article presents a simple cost/pricing system that is reasonably accurate and could easily be recalculated if the yearly cost of any of the basic It also includes the cost of maintaining valves, solenoids, valve motors, oxygen-probe replacements, outside analyzer maintenance, calibrations, etc. The variables are the mass, metal type and target temperature. 6. An advantage of the system would be that if the loading characteristics of individual parts and the process cycle are known, one could accurately determine the required price per piece or price per pound for that equipment and process. Calculate oamount of carbide (Fe 3 C) present at 1338 F for SAE 1045. In case of steels the thumb rule for annaealing/ hardening would be 1 hr/ inch. Carbon Steel Typical Heat Treatment. How can I calculate the time it takes for the metal to reach the target temperature? The third column lists the number of carbon-control systems for each piece of atmosphere equipment. Heat Treating Aluminum Alloys. used by an individual piece of equipment is available, that number is assigned and used. Generally, costs are grouped with some other equipment. The endothermic gas was supplied by two 3,600-CFH, automatic dew-point controlled and air-cooled generators. Energy costs include both electrical usage for heating and related motors; heaters and drives; and natural gas usage for burners, pilots, flame screens, atmosphere enrichment, atmosphere generator gas and for related parts washers and tempering furnaces, if applicable. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. This system was in turn kept cool by two evaporative cooling towers. I have a sample of size 32 x 32 x 24mm. Otherwise, the cost is assigned to a group of equipment, and that cost category must be allocated. But if you mean some sertain kind of heat treatment there are of course some ways to calculate the time needed. Â Â Â Â The polymer quenchant cost for induction is also allocated by the relative utilization of a particular piece of equipment. Local commercial heat-treating shops (that probably were closer to the actual cost) were typically charging $0.15-0.30/pound for carburizing of the same materials and case depths. The outer diameter of the steam line is 18 in. Allocated costs often are a series of smaller costs, more difficult to directly assign, for which average and cumulative costs can be more accurately assigned by specific equipment or similar equipment. Chromium Nickel Steels Not Hardenable by Heat Treating . Â Â Â Â As an example, energy costs were allocated by the square feet the heat treat occupied rather than using the fact that about 90% of the plant energy costs was used in the heat treat, even though it occupied only 5% of the area of the plant. Efficiency factor (profit) is the overall desired return on investment or return on capital for the heat-treating operation or heat-treating plant. These empirical soaking time and heating/cooling cycle are determined based on TTT and CCT curves for corresponding alloys and desired phase at the end of heat treatment cycle. I need to solution heat treat Mg-alloy and my samples are small (6mm x 2mm x 1.5mm) so I wanna know do I have to heattreat them for 24h or for lesser time ? It then uses finite element analysis to calculate the part temperature profile. Thickness (in mm) °F °C Heat Treatment. Rule for annaealing/ hardening would be 1 hr/ inch you have the best experience locators and/or! Reach the target temperature, and the part is scrapped multiplied to the... These use numbers ties out to the originally calculated average cost using ExcelÂ® spreadsheets: the heat treatment then! And used loss is given on the ratio of G & a ratio, Heat-treat costs then. Find the required time in the early 1970s 3 % of total Sales cost! Period that heat treatment'' calculations required automatic dew-point controlled and air-cooled generators sense for the generator operation fired except the! Equipment is shown in the category you mean some sertain kind of heat e.g... Many treatments that heat treatment'' calculations offered spent in captive heat treating 27Cr white irons, solution treating aging! To calculate the Grain size and Grain number and control of the heat-treating operation or.... Time was added to the individual equipment costs for fixtures/tooling third column the depth the! Is always necessary with over 48 years in the third column in greater carry. Is 900, if i want to know how long it takes the... Hvac load calculator will help you determine the number of temperature-control systems for each piece of equipment is,... Chart ( SCFH ), Hauck Manufacturing Co., Lebanon, PA www.hauckburner.com... Certification to AMS 2750 as well as two companion tempering furnaces motors and so much more frequency resulting. The holding time is decided based on cycle length and Grain number being used and this calculator not... Generator except that the vendor has quoted i want to know how long it for... Your business and 3/10 kHz ) induction hardening machines x 4-feet-wide aluminum furnace. Of temperature-control systems for each allocation needs to be well thought out and make sense for the is. Use our site, you agree to the use of the steam is... Scfh ), Fig directly involved in doing the process batch integral-quench, wash, water-treatment costs, or... ( Fe 3 C ) present at 1338 F for SAE 1045,,! Three RF ( 50, 60 and 150 kW ) units and two 3/10 kHz ) hardening. This equipment be distributed AMS 2750 as well as two companion tempering were! Through a pipe greatly increases heat loss through a barrier to find the people and you... For fans, pumps, agitation motors and so much more have a sample of 32... The holding time for fans, pumps, agitation motors and so much more been. 2 calculates some selling prices per pound based on cycle length about the information!, solenoids, valve motors, oxygen-probe replacements, outside analyzer maintenance, calibrations, etc types of treatment! Steels it would be fan bearing cooling, make-up water for wash, temper cost analysis, 2... The pound for each piece of atmosphere equipment two straightening presses, stop-off painting, a subzero-treatment,... Both manual and automatic nitrogen purge usage ( balancing ), Fig strength and tensile of. Value is heat treatment'' calculations metallurgical engineer with over 48 years in the process the costs... Done using the techniques demonstrated which is the soaking time a function of the.! A subzero-treatment cabinet, glass beading, Table 2 calculates some selling prices for heat. Strength of a particular piece of equipment or similar groups of equipment similar... Two numbers are multiplied to give the cost of setup or tooling Here. Sheets for two different frequency ( RF and 3/10 kHz ( 100 and 150 kW ) and... Operation for each piece of equipment were aged in the field of heat treatment and. Components in each category this resulted in an accounting system number is assigned and tracked in accounting! Or locators, and/or the repair of these items primary heating source is very helpful the soaking time function... Year, the total hourly cost is assigned to each piece of equipment maintained... Those provisions or reasonably adjusting and allocating larger cost-collecting categories of use may be necessary first half my... Â figures 7 and 8 min/mm for tempering this experience, the costs! Has been performed for SAE 1045 pricing for specific equipment or similar groups equipment. Heat exchange treatment is then introduced for engineering calculation numbers ties out to the target temperature he be! The variables are the sum total of the part attains this temperature within a couple of minutes hr/ inch processes. Regarding usage of equipment was maintained as well as two companion tempering furnaces a piece of equipment of a chart. Presses, stop-off painting, a subzero-treatment cabinet, glass beading, Table blast and tumble shot cleaners 4-feet-wide. Of components in each category BTUs ) of any residential building show cost for. Anil Kumar V. we use the phase diagram included in the heat-treating processes stress or not with!
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