This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of daily-use knives. This standard applies to daily-use knives, not hunting knives, daggers, kitchen knives, etc. QB/T 2141.1-1995 Daily-use knives QB/T2141.1-1995 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
1 Subject content and scope of application
QB/T2141.1—1995
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of daily small knives. This standard applies to daily knives, not to hunting knives, daggers, kitchen knives, etc. 2 Reference standards
GB/T1.3 Guidelines for standardization work Provisions for the preparation of product standards GB/T 2828
GB/T 2829
GB/T3280
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)Counting sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability)Stainless steel cold-rolled steel plates
High-quality carbon structural steel cold-rolled steel strips
GB/T35221
GB5938 Test method for corrosion resistance of metal coatings and chemical treatment layers of light industrial productsNeutral salt spray test (NSS) methodGB5944 Evaluation of corrosion test results of metal coatings of light industrial productsQB/T2141.2 Test method for sharpness of daily-use knives3 Terminology
3.1 Carbon steel knife: a knife with a blade made of carbon steel. 3.2 Stainless steel knife: a knife with a blade made of stainless steel. 3.3 Assembled knife: a knife whose parts are assembled after surface treatment. 3.4 Assembled knife: a knife whose main parts are assembled and then surface treated. 3.5 White edge: the part of the blade where the two edges do not intersect. 3.6 Handle: the assembly of the splint and the knife shell. The names of the various parts of the knife are shown in Figure 1.
1-Blade; 2-Rivet 3-Spring; 4-Splint, 5-Knife ring, 6-Knife shell; 7-Trademark; 8-Nail groove Approved by China Light Industry General Association on August 8, 1995
Implemented on April 1, 1996
4 Product classification
QB/T2141.1-1995
4.1 According to the structure, it can be divided into single-opening, double-opening, multi-opening, etc. (see Figure 2). . Single-opening knife
b. Double-opening knife
c. Multi-opening knife
4.2 According to the purpose, it is divided into single-opening one-purpose, single-opening two-purpose, double-opening two-purpose, double-opening three-purpose and multi-opening multi-purpose knife. 5 Technical requirements
5.1 Materials
The materials of the main parts of the knife shall comply with the provisions of Table 1 or adopt other materials with performance not lower than that specified in the standard. Table 1
Part name
Reference standard
GB/T3522
GB/T3522
5.2 Hardness
5.2.1 Carbon steel blade: HRC52~～60.
5.2.2 Stainless steel blade: HRC50~56.
5.2.3 Multi-opening knife parts are specified according to their use requirements. Brand
5.3 Metallographic structure
5.3.1 Carbon steel blade: The tempered martensite level shall not be greater than level 4. Reference Standards
GB/T3280
GB/T3280
5.3.2 Stainless steel blade: tempered martensite + carbide + a small amount of retained austenite (bainite may also exist). 5.4 Cutting Edge
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3Cr13.7Cr16
2Cr13.3Cr13
QB/T 2141.1--1995
5.4.1 The sharpness of the cutting edge shall not be less than 4 layers of copper plate as measured by a daily knife sharpness tester. 5.4.2 The cutting edge shall have no obvious burrs, white edges or annealing. 5.4.3 The cutting edge line shall not be wavy and the width of the cutting edge shall be uniform. 5.5 Elasticity
5.5.1 The blade shall feel relaxed when opened.
5.5.2 When the blade is opened at an angle of not less than 15° from the end position, it can automatically bounce to the end position. 5.5.3 When the blade is closed at an angle of not less than 20°, it can automatically bounce. 5.5.4 For knives without springs, the parts are properly tight after closing and cannot be thrown away. 5.6 Surface roughness
Except for special requirements, the surface roughness of the blade is measured, and the arithmetic mean deviation value R of its profile is not greater than 0.2um, and the sampling length is 0.8mm.
5.7 Electroplating layer
The corrosion resistance test of the electroplating layer of the assembled knife is 6h, and the corrosion resistance level of the substrate is not less than level 5; the corrosion resistance test of the electroplating layer of the sub-packed knife is 8h, and the corrosion resistance level of the substrate is not less than level 5.
5.8 Requirements for finished knives
5.8.1 After the blade is opened, it shall not lean back or shake its head obviously. 5.8.2 When the blade is closed, the cutting edge does not touch the splint; after closing, it does not touch the spring and the tip of the blade is not exposed. The nail groove does not sink into the handle of the knife by more than one-third of its width.
5.8.3 When the double-opening or multi-opening knife is closed, the parts are not misaligned. 5.8.4 The spring and the splint or knife shell are matched after the blade is opened or closed. 5.8.4.1 The height or height of the assembled knife does not exceed 0.9mm. 5.8.4.2 The height or height of the assembled knife does not exceed 0.3mm. 5.8.5 The gap between the spring and the splint is not greater than 0.2mm. 5.9 Appearance
5.9.1 The surface of the whole knife is smooth and there shall be no obvious scratches. The rivet head is round and there is no obvious sinking of the flat rivet. 5.9.2 The pattern of the knife shell is clear, and there shall be no obvious bubbles and shrinkage holes on the decorative surface. 5.9.3 The trademark is clear and in the right position.
5.9.4 The surface of the electroplating layer should be uniform in color, without whitening, delamination, blistering or rust. 6 Test method
6.1 Hardness test
6.1.1 Test with Rockwell hardness tester.
6.1.2 Test location
On the parallel line at half the width of the blade from the cutting edge, measure one point at 10mm from the tip, 5mm from the heel and the midpoint of the two points, and the other three points.
6.2 Metallographic test
6.2.1 Test with metallographic microscope (500×). 6.2.2 Observation location is on the cross section at half the length of the blade cutting edge and one third of the distance from the cutting edge. 6.3 Cutting edge sharpness test
Cutting edge sharpness shall be tested in accordance with the provisions of QB/T2141.2. Items 5.4.2 and 5.4.3 shall be inspected by visual inspection. 6.4 Elasticity test
Use a protractor to measure the angle between the line connecting any point on the blade and the limit position with the blade rivet as the axis, as the angle of spring straightening and springing in. 5.5.1 and 5.5.4 are tested by hand. 506
6.5 Electroplating layer test
QB/T2141.1—1995
Electroplating layer is tested according to GB5938, and corrosion resistance level is evaluated according to GB5944. 6.6 Surface roughness test
Tested with an electric profiler.
6.7 Finished knife test
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5.8.1~~5.8.3 are tested by hand visually, the height relationship between the spring and the splint or blade shell is measured with a vernier caliper, and the gap is measured with a grade 1 or 2 feeler gauge.
6.8 Appearance inspection
In natural light or with an illumination of 200~300lx (equivalent to the illumination of a 40W fluorescent lamp at 500mm), visually inspect the surface of the sample at a distance of 350mm from the naked eye.
7 Inspection rules
7.1 Inspection classification
Product inspection is divided into factory inspection and type inspection. 7.2 Factory inspection
7.2.1 Factory inspection is carried out according to the normal inspection and one-time sampling plan in GB/T2828. See Table 2 for inspection items, inspection levels and qualified quality levels.
Inspection items
5.4 Cutting edge
5.5 Elasticity
5.8 Finished knife requirements
5.9 Appearance
Test methods
6.3 Cutting edge sharpness test
6.4 Elasticity test
6.7 Finished force test
6.8 Appearance inspection
Inspection level IL
Acceptable quality level (AQL)
7.2.2 Determination of qualified and unqualified batches
Count the number of Class B and Class C unqualified products respectively. If the number is equal to or less than the qualified determination number (A.), the batch is judged to be qualified; if the number is equal to or greater than the unqualified determination number (R.), the batch is judged to be unqualified. 7.2.3 Disposal of unqualified batches
When a batch of products is judged to be unqualified, the manufacturer shall inspect all the products and eliminate the unqualified products before resubmitting them for inspection. 7.3 Type inspection
7.3.1 Type inspection shall be carried out when any of the conditions specified in Article 6.6.1 of GB/T1.3 is met. The product type inspection cycle shall be at least once a quarter.
7.3.2 Type inspection shall be carried out according to the single sampling plan of discrimination level 1 in GB/T2829. 10 samples are drawn from the qualified batches of factory inspection. The inspection items and unqualified quality levels are shown in Table 3.
Inspection items
5.2 Hardness
5.3 Metallographic structure
5.6 Surface roughness
5.7 Electroplating layer
Test method
6.1 Hardness test
6. 2 Metallographic test
6. 6 Surface roughness test
6.5 Electroplating layer test
Unqualified quality level (AQI)
QB/T 2141.1—1995
7.3.3 The judgment of passing or failing in type inspection and the disposal of unqualified after inspection shall be carried out in accordance with Articles 4.11 and 4.12 of GB/T2829.
8 Marking, packaging, transportation, storage
8.1 Marking
The knife should have a trademark.
8.2 Packaging
8.2.1 The cutting edge of carbon steel knives should be treated with rust prevention. 8.2.2 Products should have a certificate of conformity.
8.2.3 The moisture content of wooden boxes should not exceed 18%, and the moisture content of cartons should not exceed 16%. The boxes should be lined with moisture-proof paper. All types of packaging should be dry and packed according to customer requirements. The outside of the box should have marks and words such as product name, item number, quantity, volume, child volume, factory name, factory address, and factory date. 8.3 TransportationWww.bzxZ.net
During transportation, it should not be violently moved. It is strictly forbidden to be exposed to rain and moisture. 8.4 Storage
8.4.1 Storage requirements: Packed products should be stored in a ventilated, dry warehouse with a relative humidity of less than 80%, more than 30cm above the ground, and there should be no acid, alkali or other corrosive gases around.
8.4.2 Storage period: The product can be stored for -- years if it complies with the conditions of 8.3 and 8.4.1. 508
A1 First-class products
QB/T2141.1-1995
Appendix A
Grading regulations for daily knives
(Supplement)
All products that meet the technical requirements of the standard are first-class products. A2 Superior products and qualified products
A2.1 The classification of superior products and qualified products is shown in Table A1. Table A1
Technical requirements
5.2 Hardness
5.3 Metal weaving
5.5 Elasticity
5.6 Surface roughness
5.7 Electroplating layer
5.8 Finished knife requirements
5.9 Appearance
Carbon steel knife HRC55~60
Carbon steel national fire horse body grade not more than grade
Weili joint not less than 5 steel plate paper
Simplified text
Text of this standard
Electroplating layer corrosion resistance test brain 12, substrate corrosion grade not less than 5 Commercial standard text
Same as this standard Xiong Jianwen
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冏正本标准正文
冏正本标准正文
同本标#正文
手蒸浅紫
R，不可.8um
周本懋准延文
The gap is not more than 0.4rarn, and the height is not more than 0.5mm. There are slight differences (the penalty is agreed by the supply and demand parties) 2 Superior products must meet all the terms of Table A1, and qualified products shall not be lower than the corresponding terms of Table A1. A2.2
Additional instructions:
This standard is proposed by the Quality Standard Department of China Light Industry Association. This standard is promoted by the Jinguo Daily Hardware Standard Promotion Center. This standard was drafted by Lihai Asia Power Factory. The main drafter of this standard is Ling Puxiong.
This standard adopts the former Soviet Union national standard 1OCT5.885-1971 "Quality Identification of Children and Infants". From the date of implementation of this standard, the professional standard ZBY73030-1989 "Daily Knife" issued by the former Ministry of Light Industry will be invalid.
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