42CrMo-5 TLT Axial Fan Parts Blade Shank Supply Fan Blade Handle M56*2

Blade Shank,Supply fan blade handle M56*2,φ154*401

技术要求
1.材料需作如下试验
(1)同冶炼取试样作化学成份分析
(2)同冶炼炉同连续热处理取2%,但不少于两套试样作机械性能试验(σb,σs,δ,Ψ)
(3)同冶炼炉同连续热处理取2%,但不少于二套试样作冲击试验(αk)
(4)对每一件测定硬度(HB)
2.材料调质后,机械性能
(1)σb=800 N/mm2/
(2)σs=600 N/mm2/
(3)δ5=15 %
(4)Ψ=45 %
(5)αk=58Nm/cm2/
(6)HB=230~260
3.零件需按JB/T1581-1996作超声波检验
4.M56×2-6h螺纹与螺母配车,精度不得低于2级
5.检修时发现:
1)磨损严重,必须更换.
2)轴头根部有裂纹,必须更换.
3)不能修复螺纹,必须更换.
4)叶柄与螺母咬死不能分离气割后,必须更换.

Technical requirement

1. The material shall be tested as follows

(1) Chemical composition analysis of samples taken with smelting

(2) 2% of the same continuous heat treatment with the smelting furnace, but not less than two sets of samples for mechanical properties tests (σb,σs,δ,Ψ)

(3) Take 2% of the same continuous heat treatment with the smelting furnace, but not less than two sets of samples for impact test (αk)

(4) Determine the hardness of each piece (HB)

2. Material after tempering, mechanical properties

(1) σb=800 N/mm2/

(2) σs=600 N/mm2/

(3) δ5= 15%

(4) Ψ= 45%

(5) alpha k = 58 nm/cm2

(6) HB=230~260

3. Parts need to be ultrasonic inspected according to JB/T1581-1996

4. M56× 2-6H thread and nut matching, accuracy shall not be less than 2

5. Found during maintenance:

1) Serious wear, must be replaced.

2) The root of the shaft head is cracked and must be replaced.

3) The thread cannot be repaired and must be replaced.

4) The petiole and nut bite can not be separated after gas cutting, must be replaced.