HG/T 2046-1991 Technical requirements for vacuum sintered rings for mechanical seals HG/T2046-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T204691
Technical Conditions for Vacuum Sintered Rings for Mechanical SealsPublished on July 6, 1991
Ministry of Chemical Industry of the People's Republic of China
Implementation on January 1, 1992
Chemical Industry Standard of the People's Republic of China
Technical Conditions for Vacuum Sintered Rings for Mechanical Seals1 Subject Content and Scope of Application
HG/T2046-91
This standard specifies the vacuum sintered rings for mechanical seals (hereinafter referred to as sintered rings) This standard applies to the manufacture and product inspection and acceptance of sintered rings. 2 Reference standards
GB1184 Shape and position tolerances Provisions for unmarked tolerances GB1220
GB1801
GB1958
GB2828
Stainless steel bars
Tolerances and fits: Tolerance zones and fits for holes and shafts up to 500 mm Shape and position tolerance detection provisions
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) ）GB3177
GB4340
3 Technical requirements
Smooth workpiece size inspection
Metal Vickers hardness test method
3.1 The matrix material of sintered ring is mainly 1Cr18Ni9, 0Cr19Ni9, 00Cr17Ni14Mo2, and the chemical composition shall comply with the relevant provisions of GBI220.
3.2 The chemical composition of the alloy material of the sintered layer of the sintered ring shall meet the following requirements: C (0.5~1.2%); B (3.5~5.0%); Si (3.5~ 5.0%); Cr (25~30%); Fe (≤5.0%); Ni (remainder). The surface hardness of the sintered layer shall not be less than 650HV3.3 The maximum allowable value of the roughness Ra of the sintered ring seal end face is 0.2um, and the maximum allowable value of the flatness is 0.9μm. 3.4 The maximum allowable value of the surface roughness Ra of the contact part between the sintered ring and the auxiliary seal is 3.2μm, and the outer circle and inner hole size tolerances shall be h8 and H8
of GB1801. 3.5 The parallelism of the end face of the sintered ring seal and the end face in contact with the auxiliary sealing ring shall be in accordance with the 7th grade tolerance of GB1184. 3.6 The verticality of the outer circle or inner hole of the sintered ring sealing end face in contact with the auxiliary sealing ring shall comply with the 7th grade tolerance of GB1184. 3.7 The sintered ring sealing end face shall not have cracks, delamination and other defects that affect the performance. 3.8 The maximum micropore diameter of the sintered ring sealing end face shall not exceed 0.18mm, and the porosity (equivalent to the ratio of the total area of ​​1 hole with a diameter of 0.1~0.18mm to the sealing surface area) shall not exceed 0.15%. 3.9 The radial width of the chipped edge of the sintered ring sealing end face shall not exceed 0.4mm, and the cumulative circumferential length shall not exceed 10mm. 3.10 The thickness of the sintered layer of the sintered ring shall not be less than 0.7mm. 4 Test method
4.1 The hardness of the sintered ring shall be measured using a Vickers hardness tester in accordance with GB4340. 4.2 The dimensional tolerance and geometric tolerance of the sintered ring shall be inspected in accordance with the provisions of GB3177 and GB1958 respectively. 4.3 The defects of the sealing end face of the sintered ring shall be inspected by visual inspection, and the micropores shall be inspected by a metallographic microscope at a magnification of 100 times. Approved by the Ministry of Chemical Industry of the People's Republic of China on July 6, 1991 and implemented on January 1, 1992
5. Inspection rules
HG/T2046~-91
5.1 The sintered rings shall be inspected piece by piece by the inspection department before leaving the factory. The inspection items shall be carried out in accordance with Articles 3.1~3.10 of this standard. 5.2 The hardness of the sintered layer of the sintered rings shall be sampled and inspected. The sampling method shall be in accordance with GB2828. The normal inspection one-time sampling plan shall be adopted, IL=S-4, AQL=10bZxz.net
5.3 The micropores and surface defects on the sealing end face of the sintered ring shall be inspected piece by piece. 6 Packaging, transportation and storage
6.1 The products shall be accompanied by a packing list, product certificate and quality certificate. 6.2 The packaging should be able to prevent product damage and parts loss during transportation and storage. The manufacturer shall provide product installation and use instructions according to user requirements. 6.3
Additional instructions:
This standard is proposed by China National Chemical Equipment Corporation, and is under the jurisdiction of the Chemical Industry Ministry's Chemical Special Seals Standardization Technical Committee. This standard is drafted by Beijing Chemical Machinery Plant and Beijing Institute of Chemical Technology. The main drafters of this standard are Xu Jinrong and Li Jihe.
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