This standard specifies the method for determining green strength by transverse fracture strength of rectangular cross-section compacts. GB/T 5160-2002 Determination of green strength of metal powders Transverse fracture method of rectangular compacts GB/T5160-2002 Standard download decompression password: www.bzxz.net

ICS 77. 040. 1C
National Standard of the People's Republic of China
GB/T5160—2002
idtIs3995：1985
Metallic powders Determination of green strength hytransverse rupture of rectangular crushing method
Metallic powders Determination of green strength hytransverse rupture of rectangular crushing method Issued on August 23, 2002
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on March 1, 2003
GH/F5160—2002
This standard was revised based on [S03995:1985 Metal powder test method for determining the root fracture strength of rectangular crushed steel G3/51U-195 metal powder test method] and is equivalent to this international standard in terms of technical content.
This standard has been partially modified from GB/T3150-19HF.: The name of the standard has been adjusted according to G11; S.6. "Loading rod device" has been added;
The mold design is based on the diagram of TS3935:1985; the press capacity has been changed from 500ky--60nkV to 300kN; the test sample has been increased to 3 pieces;
The Y size has been changed from 3×2mm5.5mm~50m to 30m×(10m13m(5.5 nm--3.5mc).
This standard replaces GBT5160196 on the date of implementation. This standard is proposed by the State Administration of Nonferrous Metals. This standard is under the jurisdiction of China National Institute of Standards and Metrology and Quality. The main drafters of this standard are: Zhang Ximing, Liu Bujie, Sixiang, Li Siquan, GB/151602002
153 (International Organization for Standardization is a world-wide joint organization composed of national standardization bodies (15)). The formulation of international standards is completed by technical committees. All member groups have the right to participate in the work of the technical committees. International organizations (other than their respective counterparts) that maintain contact with IS may also participate in the relevant work. The draft of the international standard formally adopted by the technical committee shall be submitted to the member groups for voting. International Standards are formulated by IS/TC119/SC Powder Metallurgy Technical Committee. 1S03995 was first issued in 1SS?, the first and second editions were revised, and the first edition was replaced by the second edition. 1 Scope
National Standard of the People's Republic of China
Determination of green strength of metal powders
Rectangular compression fracture method
Metallic piwders-cicrmination of green strength by transverse rupture of reclangular compicts GB/T1692002
1dt 150 3995.1985
Replaced by G155:90—1985
This standard stipulates the method of determining the initial strength of the steel by the method of measuring the initial strength of the steel in accordance with the principle of testing: under light conditions, a force is applied to the steel until fracture occurs, and the fracture is regarded as the depth of simple support. The recovery dynamic of the fracture after the fracture is calculated by the bending formula, that is, the elasticity of the fracture. The initial strength is determined by the compression of the steel under a specific force at a certain rate. 3.1 Dies and punches The die is made of low-quality H-grade alloy steel and is used to prepare the test specimens according to the specifications given in Table 1. 3.2 The press must be able to load 0 kN at a speed not less than 2 kN/s and be able to load at half the speed at which the test specimen is pressed. The precision of the test specimen shall be 10.3.4 Measuring instrument The precision of the measuring instrument shall be a T-meter or other suitable instrument or device with a T-meter or other suitable instrument or device. 3.5 The test is composed of two fixed spacing support bodies (below) and a spherical body (light body). The diameter of the spherical body is 3.m (1.7HV). The center of the two support bodies is 10.m and the center of the spherical body is 0.1m. The loading beam is installed in the middle of the inner support. The installation area should be considered when testing the surface and surface of the sample. Allowable deviation of the seat. Typical test diagrams are shown in the figure. 3.6 Add my bone
Select one of the following
3.5.° Pressure test
Determine the breaking force of 5 less than 20 N.
3.6.2 Capacity
Approved by the State Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on August 23, 2002 and implemented on March 1, 2003
GB/T516D—200 2
Can accurately install the double style to add the effect of the mutual standard, the processing force can be provided by various systems, Figure 3 shows an example, the design is complicated and the accuracy of the test force is increased? Unit: mm
Note: The accessories are tightened and matched, and the alloy should be WHRC062
on the punch-25
Figure 1 is the design example
Figure public test light H diagram
4 Take Sample
GD/T5160—2002
Test control equipment
Figure Loading rod device
Weigh the length of the test rod, and prepare a sample with a width of 10mm--13mml. The minimum length is 30mm. The maximum length is 5.5mm--5mm. The sample is evenly spaced, and the maximum and minimum tolerances are 3.1mm within the entire range of pressure between the support points. The test must be carried out as soon as possible to obtain the required inspection quantity
5 Steps to avoid
5.1 The situation of the female mold being punched
Use soft, high-gas paper that has not been soaked in deoxidizing agents such as rubbing agents to punch the mold, and wait for the liquid to evaporate before using: 5.2 Final forming cases
5.2.1 Small particles can be pressed into the mold to form a good shape (just press it into the mold under the pressure of the mold, and mold jamming and severe friction may occur); 6) Forming after the mold is smooth (see 5.3. 1) After the lubrication tape is combined (see 5.3.2), carefully shape it. 5.2.2 The powder containing the pre-lubricant can be formed according to the following method a! Ten mold shapes;
b) After adding the lubricant <see. 5.3.2): Dry connection or forming. 5.3 Floating
Use the following lubrication method: bzxz.net
5.3.1 Quick lubrication tape
Apply the lubricant (such as 100nm zinc stearate) on the plain surface of the raw mold cavity, and wait for the box agent to develop, and a layer of lubricating film will be formed.
.3.2 Powder disintegration
Test the viscosity of the powder droplets and the lubricant according to the quantity (measured by 100% t/cm2, 50% t/cm2) of each sample.
5.4 Forming and demoulding
Insert the lower die punch into the mold. Place the female die under the mold with a support block at an appropriate temperature, inject powder into the mold, and ensure that the powder is evenly distributed in the mold. Install the upper punch, leave the mold with the die punch on the machine table, and place a pre-load of about 20 kg on the screen, and press the support. If the female die is supported by a spring or other means, it will not be accelerated.
CB/T 5160 -2002
The speed of the mold is not fast enough.
Use the lower die punch to remove the mold. The steps of sample preparation are shown in Figure 1.
Figure 4 Sample preparation process
5.5 Forming force
The forming force or density of the sample is determined by negotiation between the parties. In the previous case, the sample is pressed to a certain density. The difference between the density of each sample should be 3.1/cm5.6 Determination of impact strength
Measure the width and thickness of the test group. The width and thickness of the test group are measured by the standard. The test volume is 1.15.
5.7 Determination of breaking force
Use a small frequency variable load to stop the sample and the test sample is broken under the shock test 5.7.1. The test machine used in the test is placed on the fast intermittent test center (see Figure, and the auxiliary establishment of the modified example is mutual: Place the actual test machine on the test platform, so that the sample can be loaded in a river, and the new type of fracture type can be recorded in a time of not less than 10 seconds, and it is confirmed to be 2. 5.7.2 Flexible loading pipe
GH/T5160-2CC2
Adjust the weight of the column to make it level. Place it on the loading device 1: (see Figure 3): Judge the placement of the well and the toilet to reach the error or account for the exploration. Load at a uniform speed, so that the test is called kidney fracture in a time of not less than 10 seconds. The fracture value box of the construction is confirmed to be 2,
method: Use the machine with the sense of protection and hardness to record the whole model of the bridge, and teach Calculate the load of the lock spring force. 6.1 The test results are as follows: Calculate the rate of change of the test piece according to the quality of the test piece, and calculate the arithmetic product of the change of the test piece: the value of the arithmetic product of the change of the test piece, and the formula is as follows:
The strength of the test piece changes MPm;
The force of a break;
Height of the fulcrum mm
-Test piece mm;
Width of the test piece:
S-3XHXI
.3 The arithmetic product of the calculation of the test piece before the small 10MF is calculated, and the result is O.MP: 1) MP: The value is accurately marked 0.5MPa
The test report should include the following:
Net? This calibration number:
6) Qualification of test specimen tooth breaking force:
) Type, quality, quantity and lubrication method of lubrication series (if the lubricant is added, the state indicates that the lubricant is added) d Test temperature or forming pressure:
() Forming material of calcium or hard alloy: Test results:
: This standard specification is implemented:
What can you tell us about the test results?
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