This standard specifies the varieties, models, dimensions, shapes, weights and tolerances, technical requirements, test methods, inspection rules, packaging marks and quality certificates of hot-rolled guide steel for coal mining machinery. This standard is applicable to the manufacture of scraper steel and channel steel series special-shaped steel for scraper conveyors. GB/T 3414-1994 Hot-rolled special-shaped steel for coal mining machinery GB/T3414-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Hot-rolled special-shaped steel for coal mechanism
Hut-rolled special-shaped steel for coal mechanismSubject content and applicable scope
GB/T 3414—94
Replaces part of GB3414--82
This standard specifies the variety, model, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, dangerous equipment marking and quality certificate of hot-rolled special-shaped steel for coal mechanism. This standard is applicable to the manufacture of scraper steel and channel steel series of special plastic steel for scraper conveyors. Reference standards
H222 Sampling method for chemical analysis of pliers and allowable deviation of finished product composition. Chemical analysis methods for steel and alloys
GR 2101
General provisions for acceptance, packaging marking and quality certificate of steel sections
GB6397
3 Brand representation method and code
The brand is composed of Chinese phonetic letters and Arabic numerals, such as M510, M540, M565. M-
“Mei\Ning” Chinese Pinyin first letter.
510.540.565-
Tensile strength value of scraper steel and channel side.
4 Variety, model, size, shape, weight 4.1 Variety, model, size. Cutting area. Theoretical weight and size tolerance should comply with the provisions of Table 1 and Figures 1 to 10. Table 1
Scraper rim
Scraper sword
Business density
Scraper steel
Channel steel
Channel steel
Channel weight
Approved by the State Administration of Technical Supervision in 1994-0613
Cross-sectional area
Theoretical weight
Average thickness!
19950101 implementation
GB/T 3414-94
4.1.1 With the agreement of both parties, the products can be supplied in the models other than those in Table 1. 4.2 Length and allowable deviation
4.2.1 The delivery length and allowable deviation of scraper steel and channel steel shall comply with those in Table 2 2
Note: 1) is the multiple length,
fixed multiple length
1×332
#×444
#×1215
nx1210
nx1210
n×1510
α×1510
nX1210
Station×1510
4.2.2 If the buyer has special requirements for the fixed length, it should be indicated in the contract. 4.3 Appearance
4.3.1 Curvature
The curvature of the scraper steel and the channel steel shall not exceed 3 mm per meter, and the total curvature shall not exceed 0. 3%. 4.3.2 Outer edge slope
Allowable length deviation
The outer edge slope of the side leg shall not exceed 2.5% of the nominal leg width for a single leg; and 3.5% of the nominal leg width for a double leg. 4.3.3 The steel shall not have obvious twisting.
Figure 1-Scraper steel
GB/T 3414-94
54-06*www.bzxz.net
Figure 26.5\Scraper steel
(All four parts without standard are R9)
Figure 312.5 Channel side steel
GB/T 3414-94
Figure 4 D15* Channel side steel
Slope 10
Figure 5M15\Pin side steel
Degree! -10
GB/T 3414—94
Freshness 0
Figure 6E15*Channel steel
Degree 111.42
Unmarked national corner radius is R
Material degree 1-11
Figure? M18Channel steel
Material degree 1±10
Degree 1 20
GB/T 3414—94
Unmarked national corner radius is R9
Figure 8E19\Channel steel
Figure 9M22\Channel steel
Degree 1: 10
Solution 1-6-31
GB/T3414—94
222*15
Figure 10E22# groove side
Sketch of additional strip steel measurement
Figure 12 Measurement of the slope of the outer edge of the leg
4.4 Weight
GB/T 3414-94
Continued Figure 12
Scraper steel and tip side steel are delivered according to theoretical weight. They can also be delivered according to actual weight, but it should be specified in the contract. 5 Technical requirements
5.1 Grade and chemical composition
5.1.1 The grade and chemical composition (melting analysis) of the steel shall comply with the provisions of Section 3. Table 3
Chemical composition, %
0.20～0.27
0.20~-0.39
0.25~~0.33
0.20-0.60
0.17--0.37
0.17--0.37
1.20--1.60
1.30~1.80
1.30--1.80
5.1.2 The content of residual elements nickel, chromium and copper in steel shall not exceed (.30%) respectively. If the supplier can guarantee it, no analysis is required. 5.1.3 The allowable deviation of the chemical composition of the finished steel shall comply with Table 1 in GB 222 5.1.4 With the agreement between the supplier and the buyer, grades other than those in Table 3 may be supplied. 5.2 Delivery status
Scraper steel and channel side steel are delivered in hot-rolled state. 5.3 Mechanical properties
5.3.1 The mechanical properties of steel shall comply with the provisions of Table 4. Table 4
Test state
Heat treatment
Heat treatment
Use origin. ,
Not less than
Tensile strength
Not less than ten
Not greater than
Elongation:
Not less than
GB/T 3414—94
5.3.2 When the hot rolling properties of M540M565 do not meet the requirements of Table 4, it is allowed to heat treat the sample. When the mechanical properties of the sample meet the requirements of the heat treatment properties in Table 4, it can also be converted.
Heat treatment system, 850±20 oil level, 100～450℃ tempering, water cooling. 5.4 Surface quality
5.4.1 The surface of the steel should be inspected with the naked eye. There should be no delamination, cracks or inclusions. 5.4.2 The surface of the steel is allowed to have local hairline and the depth should not exceed 0.8 mm. Folds, knots, pits, pits, scratches and lumps with a height of more than 1mm.
5.4.3 Surface defects of steel are allowed to be cleaned, but horizontal cleaning is not allowed. The cleaned area should be smooth and without corners. The cleaning width should not be less than five times the depth of the cleaning. The cleaning depth is measured from the actual size and shall not exceed the negative deviation allowed by the steel. 5.4.4 The burr at the end of the M18 groove side pot is not greater than 3mm5.4.5 Surface defects of steel shall not be welded or filled. 6 Test method
The inspection items, sampling number and sampling method of each batch of steel shall comply with Table 5 and 6.2, Table 5
Inspection items
Chemical composition
6.2 Dimensions, shape inspection methods
6.2.1 Length
Measure with a ruler or tape measure.
6.2.2 Cutting dimensions
6.2.2.1 Scraper steel is measured with a test sample. Sampling number
1 Body size)
Specific method
Special plate steel is cut on the longitudinal center line near the head according to GR6397
Steel: D12. 5, D15. M15 Take E15, M18, E19, M22. E22 on the long question and cut GB6397 at the fillet connection of the waist short leg
6.2.2.2 Average leg thickness allowable deviation of the groove side steel. Check during turning and rolling. 6.2.2.3 Waist thickness is checked at the end face.
Test method
GR 228
GR6397
Sample scale
6.2.2.4 Height of the groove side steel: The height of the side steel is measured at a distance of not less than 750rmm from the end face, or checked at a position agreed upon by the supply and demand parties. When measuring the tower, the waist height shall prevail. Measure the straight part outside the outer arc at the waist leg corner. The measurement station should exclude the influence of the outer edge slope of the leg.
6.2.2.5 width; the waist width of the channel side steel is measured at a distance of not less than 750mm from the end face, or checked at a position agreed upon by the supply and supply parties, with the waist height as the basis. Avoid the influence of waist unevenness when measuring. 6.2.2.6 The middle leg width, middle groove width and height of F15.E19 and F22 are checked with a template. The height of the middle leg concave platform is checked during turning and rolling, but the height after rolling should not be less than 5 r1,
6.2.3 Curvature
GB/T 341494
Measure the chord height of each meter of bending with a 1m ruler. The total curvature is calculated based on the total length of the steel and the maximum chord height. 6.2.4 Outer edge slope
The outer edge slope of the channel side steel is checked at a distance of not less than 750mm from the end face, or measured at the agreed position. The waist height is used as the basis for inspection, and the influence of the corner arc should be excluded. As shown in Figure 11. The absolute value of Q measured shall not be greater than, × 2.5% (, is the nominal size of the long leg). The absolute value of the difference between M and N measured shall not be greater than [(61+bz)/2) × 3.5%. As shown in Figure 12. 7 Inspection Rules
7.1 Steels shall be inspected and accepted by the supplier's technical supervision department. 7.2 Batch Rules
Steel shall be accepted in batches. Each batch consists of steels of the same grade, the same furnace number, the same variety and the same size. Steels smelted in a furnace with a nominal capacity of not more than 30t or steels rolled by continuous casting and rolling are allowed to be mixed batches of the same grade, the same smelting method and different furnace numbers, but each batch shall not have more than 6 furnace numbers, the difference in carbon content of each furnace number shall not be greater than 0.02%, the difference in manganese content shall not be greater than 0.15%, and the weight of each batch shall not exceed 60t.
7.3 Re-inspection rules
The re-inspection and judgment rules for the inspection items of steel materials shall comply with the provisions of GB2101. 8 Packaging, marking and quality certificates
The packaging, marking and quality certificates of plate steel and channel side steel shall comply with the provisions of GB2101. GB/T 3414-94
Appendix A
Comparison of new 18GB3414 standard grades
(Review)
The comparison of new and old GB3414 standard grades is shown in Table A1. A1
Additional remarks:
GB 341494
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgical Industry, and this standard was drafted by Chongqing Iron and Steel Company and the Information Standards Research Institute of the Ministry of Metallurgical Industry. The main drafters of this standard are Xu Guangfu, Zheng Limin, Xiao Ya, Zhou Jiaqi and Peng Zongtian. The water grade mark in this standard is
GB 3414-94 I
GB 3414—82
24Mn2K
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