Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: ht3jyx
  • Order by date
  1. ht3jyx

    how to remove oil from fasteners without using water

    quench oil from heat treating.
  2. ht3jyx

    how to remove oil from fasteners without using water

    we are a job shop, one customer requires us not to use water (cold or hot, with anti-rust agent or not) to clean parts, because the metal parts is very sensative to get rust. the parts after process normally covered with machine oil. is there any way or equipment to remove oil. someone suggest a...
  3. ht3jyx

    why Surface is harder than core but no carburization?

    understanding that 1 or 2 RC difference may be within tolerance. however we have had this variance constantly, i.e. surf is harder than core. therefore difficult to attribute the difference to test tolerance. another thing is that the parts, washers, are only two coins' thickness. i am not sure...
  4. ht3jyx

    how to answer this question regarding to compressive yield?

    what is the Compressive Yield for 4130 Chrome Molybdenum after being heat treated to 25 -30 HRC? these are washers by the way. thanks,
  5. ht3jyx

    can scale cause blister on parts after being chrome platted?

    we heat treated some parts (4130) and then send to platter to chrome plating. after platting, a few parts have blister. platter claims that it is caused by the heavy scale on parts, and the scale was formed by baking the stamping oil into the parts in the heat treating process. We start to wash...
  6. ht3jyx

    why Surface is harder than core but no carburization?

    we did some normal thru hardening job on 8740. the surface is 1 or 2 point (RC) harder than core. microscope shows no sign of carburization. why this happen? what we can do? thanks
  7. ht3jyx

    how to clean up quench oil before tempering?

    material 1075, shining washer parts. after oil quench, quench oil gives the parts a not so shine thin layer and looks dirty. if washed with regular hot water which rust prohibitive soap, the tempered parts will show soap scale. if temper without wash, the parts will still have slight blur. is...
  8. ht3jyx

    how to avoid rust while heat treating carbon steel 1075

    kenvlach, we use city water without di-ionize. the polymer ph is 8, and the quench solution is 9. is that a problem. what is the right ph i should maintain? yush
  9. ht3jyx

    how to avoid rust while heat treating carbon steel 1075

    arunmrao, the wash process after oil quench left stain (not rust), probably from the soap used in wash tank, on the parts. and customer does not like it. the polymer gives gook looking to parts, but unfortunately some parts get rust. tomorrow i will do a ph test to the polymer according to...
  10. ht3jyx

    how to avoid rust while heat treating carbon steel 1075

    we heat the parts, size of 5 cent coin, material 1075, to 1600 F and then quench at polymer water. then temper at 400 F. we always get some of parts, less than 5%, with rust stain. does anyone know how to avoid this. by the way, we can not get required hardness if quenched in oil. thanks, yush
  11. ht3jyx

    how to deal with Porocity after heat treating?

    to confirm that the parts are 1-1/4" washer, made out of stamping steel sheets. here is a strange thing. we run 2 batchs at two identical lines (same carbonitriding atomsphere), the only difference between the two lines is that one using polymer as quench media and another oil. the porocity...
  12. ht3jyx

    how to decide the time for case hardening?

    i heard the rule of thumb in heat treatment is that one hour per inch. I assume this is meant to be through hardening. is there any rule of thumb for case hardening?
  13. ht3jyx

    how to deal with Porocity after heat treating?

    by the way, can heat treating cure preexisting pores? if so, how? thanks, Yush
  14. ht3jyx

    how to deal with Porocity after heat treating?

    answer to metengr: we send the part to a metallurgic lab. I think they did general material test. but i can verify with the lab again. questions to arunmrao: what is P/M parts? what is DP test? thanks, yush
  15. ht3jyx

    how to deal with Porocity after heat treating?

    the job description: the material is steel 1010, parts are 1 1/4 inch washer. heating 1 hour at 1650F in carbonitride atomsphere. then quench in 90F poplymer. without tempering. the test on the parts after heat treating shows porosity under the surface. the question: why porocity happens? and...
  16. ht3jyx

    how to calculate the cost of a heat treating job?

    steve898, impressive, i will let you know if i have further questions. thanks, Yush
  17. ht3jyx

    is there any trade organization for metal stamping industry in CA?

    I am interested at networking with metal stamping industry, is there any trade organization/association for them in california? thanks, Yush
  18. ht3jyx

    how to calculate the cost of a heat treating job?

    stanislas all you said makes sense. have you ever done such work? if so, would you mind to share me your working template such as excel worksheet. if you do so, please erase or change all confidential data. thanks, yush
  19. ht3jyx

    how to calculate the cost of a heat treating job?

    I were just assigned to do cost analysis in a commercial heat treating company. I am new to this industry. In my previous work, I used to start cost accounting by analyzing Bill of Materials. but this company does not have such thing (BOM). So may be I need to develop one for each of their job...

Part and Inventory Search

Back
Top