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Heat treatment process operation  

2013-10-21 09:56:35|  分类: 默认分类 |  标签: |举报 |字号 订阅

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(1)应注意轴承的摆放位置,保证均匀加热,防止过热。使用煤气炉或天然气炉时,注意不要使喷嘴或火焰直接对轴承加热。
( 1 ) should be noted that the placement of the bearing to ensure uniform heating and prevent overheating. Using gas stove or gas stove , be careful not to make the bearing nozzle or direct flame heating .
(2)轴类及细长杆轴承,要注意轴承的放置,以防变形。
( 2 ) an elongated shaft and rod koyo bearings , pay attention to the placement of the bearing to prevent deformation.
(3)完全退火装炉时,一般中小型碳钢和低合金钢轴承,可不控制加热速度,直接装入已升温至退火温度的炉内;也可低温装炉,随炉升温。对于中、高合金或形状复杂的大件,低温装炉,分段升温,并控制升温速度不超过100℃/h。
( 3 ) complete annealing furnace installed , generally small and medium carbon steel and low alloy steel bearings , from time to control the heating rate, directly into the furnace heated to the annealing temperature ; also be installed furnace temperature , the furnace temperature . For medium and high alloy or large complex shape , low temperature furnace installed , segmented warming, and to control heating rate does not exceed 100 ℃ / h.
(4)大型轴承的去应力退火,应低温装炉,缓慢升温,以防由于加热过快而产生热应力。
( 4 ) large bearing stress relief annealing should be installed furnace temperature , slowly warming to prevent excessive heat generated due thermal stress .
(5)正火空冷时尽量放在平坦的地面上;无论何种轴承,在空冷时都要散开放置于干燥处空冷,不得堆放或重叠,不得置于潮湿处或有水的地方,以保证冷却速度均匀,硬度均匀。
( 5 ) normalizing air as far as possible on a flat on the ground ; whatever bearings, air cooling should be scattered in the open air in a dry place , not stacked or overlapping , not humid place or where there is water , in order to ensure uniform cooling rate , uniform hardness .
(6)材质不同,但加热温度相同的轴承可以在同一炉中加热。
( 6 ) of different materials , but the heating temperature is the same bearings can be heated in the same furnace .
(7)截面大小不同的轴承,在同一炉中加热时,小件应放在炉膛外端。
( 7 ) cross-section area of the bearing , in the same furnace heating, the small pieces should be placed on the outer end of the furnace .
(8)一般情况下,水温不超过40℃,油温不超过80℃。
 ( 8 ) Under normal circumstances , the water temperature does not exceed 40 ℃, oil temperature does not exceed 80 ℃.
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