GB/T 3851-2015 English PDF

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GB/T 3851-2015: Hard metals -- Determination of transverse rupture strength
Status: Valid

GB/T 3851: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3851-2015	94	Add to Cart	3 days	Hard metals -- Determination of transverse rupture strength	Valid
GB/T 3851-1983	199	Add to Cart	3 days	Hardmetals. Determination of transverse rupture strength	Obsolete

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Basic data

Standard ID: GB/T 3851-2015 (GB/T3851-2015)
Description (Translated English): Hard metals -- Determination of transverse rupture strength
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H16
Classification of International Standard: 77.16
Word Count Estimation: 5,561
Date of Issue: 2015-09-11
Date of Implementation: 2016-04-01
Older Standard (superseded by this standard): GB/T 3851-1983
Adopted Standard: ISO 3327-2009, IDT
Regulation (derived from): National Standard Announcement 2015 No.25
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Standard specifies the method for measuring transverse rupture strength of cemented carbide. This Standard applies to a very small plastic carbide. If used in fracture before significant plastic deformation of cemented carbide, may give incorrect results, in this case, this standard can only be used to compare.

GB/T 3851-2015: Hard metals -- Determination of transverse rupture strength

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Carbide transverse rupture strength measurement method) ICS 77.160 H16 National Standards of People's Republic of China Replacing GB/T 3851-1983 Determination of transverse rupture strength carbide (ISO 3327.2009, IDT) Issued on. 2015-09-11 2016-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 3851-1983 "Determination of transverse rupture strength carbide." This standard compared with GB/T 3851-1983, the main technical changes are as follows. --- The transverse rupture strength of the symbol by the "Rtr" to "Rbm"; --- Increased C-type samples (sample rod) transverse rupture strength test method (see section 5.1); --- Increased requirements for surface condition of the sample (see 5.2); --- Adjust the order of the chapters. This standard uses the translation method identical with ISO 3327.2009 "Carbide transverse rupture strength determination." The standard proposed by China Nonferrous Metals Industry Association. This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized. This standard was drafted. Xiamen Golden Egret Special Alloy Co., Ltd., National Engineering Research Center for tungsten material, Zhuzhou Cemented Carbide Group Co. The company, Zigong Carbide limited liability company. The main drafters of this standard. Fanzhi Rui, ZHANG Shou-wide, Sun Xiaoyu, Chen Dong Pin, Jiangyuan Xiang, Zhu Guirong, Wu Chong Hu, Xiao full bucket, Liu Tiemei, Cao Wan Jiang Yong. This standard replaces the standards previously issued as follows. --- GB/T 3851-1983. Determination of transverse rupture strength carbide

1 Scope

This standard specifies the method for measuring transverse rupture strength of cemented carbide. This standard applies to a very small plastic carbide. If there is significant plastic deformation prior to fracture of carbide, may give incorrect The correct result in this case, this standard can only be used to compare.

2 Symbol and description

The standard symbols, descriptions and units are shown in Table 1 below. Table 1 Symbol and description Symbol Description Unit F the force required to rupture the sample N Mm l distance between the two support points b specimen height and vertical width mm h and a force applied parallel to the sample height mm k compensation chamfer correction factor - Ra surface roughness μm Rbm transverse rupture strength N/mm2 The diameter d of the sample (if using round bar specimens) mm Principle 3 The sample freely horizontally on two points, the next short-term static force at mid-span of the applied, the sample breaks.

4 Device

4.1 Test equipment should have a device that can be applied uniformly loaded, its accuracy should not be less than 1%. 4.2 Test jig rod to three (roll), which should have two free flat support rod, a fixed distance between the two rods, as well as A free flat urging rod. 3 equal to the diameter of the rod, and its value can be between 3.2mm ~ 6mm. Alternatively, one can also be used directly 10mm diameter sphere afterburner. If using round bar specimens, only through three rod load. Therefore, forcing the ball is only applied to the surface The sample plane. Urging the support rod and rod (ball) tungsten carbide production applications, the material and not because of energizing significant plastic deformation Shape, surface roughness Ra≤0.63μm. The support rod should be fixed in parallel, which span for A type specimen is 30mm ± 0.5mm, For Type B or Type C sample was 14.5mm ± 0.5mm. When measuring span for Type B or Type C specimens should be accurate to 0.1mm, While the Type A specimen shall be accurate to 0.2mm. Fixed rod should be parallel to minimize the degree of deviation. ......

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