JB/T 9855-1999 This standard is a revision of ZB J84 011-88 "General Technical Conditions for Die-cast Aluminum Alloys for Rock Drilling Machinery and Pneumatic Tools". This standard specifies the grades and codes, technical requirements and inspection methods of die-cast aluminum alloys for rock drilling machinery and pneumatic tools. This standard is applicable to die-cast aluminum alloys for rock drilling machinery and pneumatic tools. This standard was first issued on January 1, 1988. JB/T 9855-1999 General Technical Conditions for Die-cast Aluminum Alloys for Rock Drilling Machinery and Pneumatic Tools JB/T9855-1999 Standard download decompression password: www.bzxz.net

S T3.100.10
Machinery Industry Standard of the People's Republic of China
JB/T9855-1999
General specifications of pressturerlie-casting aluminiumaHoys of rock driling machines and pneumatic tools1999-06-28 Issued by the State Bureau of Machinery Industry on January 1, 2000 and implemented on January 1, 2001. 18.9855-1999 This standard is a revision of ZB840E-General Technical Conditions for Die-casting Aluminum Alloys for Rock Drilling Machinery and Pneumatic Tools. The editorial rectification has been made according to the relevant issues. The main technical content has been changed. The standard replaces ZB4011-Road. Appendix A of this standard is a reminder appendix: Appendix B of this standard is a standard appendix. This standard is proposed and approved by the National Rock Drilling Machinery and Pneumatic Tools Standardization Technical Committee. Drafting unit of this standard: Dashui Fenggong Factory. The main authors of this standard: Ke Zhenjiang and Zhang Chunmei. The standard was first issued in 1988, and this is the first revision. 1 Scope
Machinery Industry Standard of the People's Republic of China
General Specification of Pressure Die-casting Aluminum Alloys for Drilling Machines and Pneumatic Tools
General Specification of Pressure Die-casting Aluminum Alloys for Drilling Machines and Pneumatic Tools IB/T4855—1990
Code J5401:-86
This standard specifies the grades and codes, technical requirements and inspection methods of pressure die-casting aluminum alloys for drilling machines and pneumatic tools: This standard is applicable to pressure die-casting aluminum alloys for drilling machines and pneumatic tools. 2 Referenced Standards
The provisions contained in the listed standards constitute a standard document through reference in the standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GBT 228V87
GB/T 23I1984
GD/T 11981975
GB/T 13822—1992
3 Grades and codeswwW.bzxz.Net
Metal tensile test method
Brinell test method
Aluminum chemical analysis method
Pressure-cast nonferrous alloy specimen
\YZA represents pressure-cast aluminum alloy. The symbol and value after it represent the main alloying elements and their content. 32 Auxiliary methods for pressure-cast aluminum alloys
“” represents the code of the cast alloy with its numerical value. 4 Technical requirements
4.1 The grade, code, chemical composition and mechanical properties of the pressure-cast aluminum alloy are shown in Table 1 and Table 2.4.2 The mechanical properties of the pressure-cast aluminum alloy are the physical properties measured by single cast tensile specimens under the specified process parameters:! The old parameters are shown in Appendix A (the appendix of the suggestion). The new ones are shown in Appendix B (the appendix of the standard). The shape and size of the 4.3 specimens are in accordance with the provisions of GD/T13B22, as shown in Figures 1 and 2. The die-casting process diagram of the specimens is shown in Appendix B (the appendix of the standard). Approved by the National Machinery Industry Corporation-6-2000-01-01 Implementation Alloy Grade YZAISTMe YZ.AISi12 YZAISiCu Y2AJZn1SiT 9855-1999 Table! Chemical classification of cast aluminum alloys
Alloy grade
YZAISi7Mg
YZAISi12
YZAJSI7C4
YZAIZISi7
Others 1
Others 1
2 Mechanical properties of die-cast aluminum alloys
Association code
Weakness control. 、
Figure 1 A type tensile test specimen
D type tensile test specimen
Mechanical properties
Long lasting 8
r0.C1 0.05
U.E1-U (S
Test method
5 credits
JB.T9855-1999
5.1.F Chemical composition analysis method shall comply with the requirements of the "/119% of the total chemical composition, the total chemical composition shall be equal to the specifications of the table 5.1.2, chemical composition inspection, I expand the double sample group 5.1.3 Chemical composition of the next inspection is not qualified, it is allowed to re-sample the inspection, if it is still unqualified, then the furnace is unqualified, 5.2 Academic ability
5.2.1 Tensile test according to G 5.2.2 The test shall be carried out in accordance with GDT231, and its strength shall comply with the provisions of Table 2. 5.2.3 The D-type test specimen specified in GD/T13822 is used to measure the Brinell strength. 5.2.4 For each test specimen, if the mechanical properties of two test specimens do not match, the test station shall not be qualified, but the test station shall allow the test specimen to be tested for the second time. If two test specimens fail in the second test, but the test specimen fails in the second test, the test station shall allow the test specimen to be tested for the second time. When the total average value is qualified, the test result is considered qualified. If there are more than two unqualified specimens, the test result is considered unqualified. The die-casting process of AI die-casting cap alloy specimens is shown in 9855-1000. Appendix A (Reminder) Die-casting aluminum alloy specimens Die-casting process parameters of normal aluminum alloy specimens are shown in Table AI. Length A1 Normal alloy specimen die-casting parameters Table VII and types Die-casting data t||Xiaoda High-pressure Die Casting Line 130-70
2M-250
Pressure ratio
43·-69
Shiye Huoyuan Speed ​​Code
BI Die Casting Sample Process
Die Casting Trial Process: See Figure B1.
1B/T9855—1999
Appendix B
(Appendix to the standard)
Jade Press Sample Process Diagram
Shi Waiting Sample Process Diagram
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