Jiaxing bearing: knowledge is related to the hardness of the bearing steel heat treatment problem

There is rotational, have HRB bearing ( ) Jiaxing bearing: knowledge is related to the hardness of the bearing steel heat treatment problem. Jiaxing bearing group sales co. , LTD. ( The company) Is jiaxing bearing factory set up in the spot sales window, specializing in HRB brand bearings, facing the whole country, the existing stock 50 million yuan, covers the whole bearing, have very strong cash supply ability. Knowledge is related to the hardness of the bearing steel heat treatment problem: annealing hardness: inspection before heat treatment hardness and organization of annealing state parts. GCr15：179- 207HB( 88 - 94HRB) , the other is 179 - 217HB( 88 - 97 hrb) If the hardness is unqualified, Too high, too low or uneven) , be careful analysis the reason, may affect the quenching ( Such as: hardness is not enough, decarburization, overheating, elliptical, etc. ) 。 Quenching tempering hardness: wall thickness is not more than 12 mm, after quenching & ge; After 60-63 HRC, tempering 65HRC； May encounter customers request special hardness, such as 61 - 64 HRC, etc. , but after tempering hardness tolerance range size in 3 HRC; Normal quenching, hardness value depends mainly on the tempering temperature. Hardness uniformity: standard, the same parts hardness uniformity is commonly 1 HRC; Diameter larger than 200 mm or greater than 400 mm for 2 HRC; More than 400 mm for 3 HRC. Hardness is unqualified performance: high hardness, high quenching temperature and heating time is long, high cooling speed too fast, carbon potential ( With increasing carbon) Low hardness: quenching temperature is low or the heating time is short, low cooling speed slow, carbon potential ( Decarburization) Decarburization, material hardness uneven: quenching temperature is low or the heating time is short, speed slow, cold material decarburization, stick the shadow. 24-hour customer service hotline: if you are more interested in jiaxing bearing the author introduced the industry information or have any questions, please click on contact us page on the right side of the online customer service, or call:, you close the way of jiaxing bearing purchasing advisors. - - - - - - Editor: jiaxing bearing sourcing consultant LTD. All rights reserved, The company) Reprint please indicate the source