This part specifies the basic requirements for the shape and position tolerances, materials and hardness, appearance and surface roughness, marking and packaging of high-speed steel turning blades. This part applies to high-speed steel turning blades produced in accordance with GB/T4211.1. GB/T 4211.2-2004 High-speed steel turning blades Part 2: Technical conditions GB/T4211.2-2004 Standard download decompression password: www.bzxz.net

ICS 25.100.10
National Standard of the People's Republic of China
GB/T 4211.2—2004
Replaces part GB/T4211-1984
High speed steel tool bits-Part 2 : Technical requirementsPromulgated on 2004-02-10
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaAdministrative Committee of Standardization of the People's Republic of China
Implementation on 2004-08-01
GB/T4211 "High speed steel tool bits" is divided into two parts: Part 1: Types and dimensions;
Part 2: Technical requirements.
This part is Part 2 of GB/T4211.
This part replaces the technical conditions in GB/T4211-1984 "High-speed steel turning blades". The main changes of this part compared with GB/T4211-1984 are as follows: Types and dimensions are listed in Part 1;
The test method part and acceptance part in GB/T4211-1984 are cancelled; GB/T 4211.2-2004
-Modified the material part of high-speed steel turning blades in GB/T4211-1984, and the material was changed from W18Cr4V to W6Mo5Cr4V2;
-Modified the marking and packaging part in GB/T4211-1984; Modified the marking method of surface roughness. This part was proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Tool Standardization. The responsible drafting unit of this part: Chengdu Tool Research Institute. The main drafters of this part: Yan Yuejian and Zha Guobing. Previous publications of the standards replaced by this part: GB/T 4211—1984.
1 Scope
High-speed steel turning blades Part 2: Technical conditions GB/T4211.2—2004
This part specifies the basic requirements for the shape and position tolerances, materials and hardness, appearance and surface roughness, marking and packaging of high-speed steel turning blades. This part applies to high-speed steel turning blades produced in accordance with GB/T4211.1. 2 Normative referencesWww.bzxZ.net
The clauses in the following documents become the clauses of this part through reference to this part of GB/T4211. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version of the document applies to this part.
High-speed steel turning blades Part 1: Types and dimensions (GB/T4211.1-2004, ISO5421:1977, GB/T 4211.17
3 Geometric tolerances
3.1 The verticality tolerance of the side of the high-speed steel turning blade to the supporting surface is grade 12. 3.2 The straightness tolerance of the side of the high-speed steel turning blade and the supporting surface or cylindrical surface element line is 0.002L (L is the length of the turning blade). 4 Materials and hardness
4.1 Materials
High-speed steel turning blades are made of W6Mo5Cr4V2 or other grades of high-speed steel with equivalent performance. 4.2 Hardness
The hardness of high-speed steel turning blades shall not be less than 63HRC. 5 Appearance and surface roughness
5.1 Appearance
The surface of the high-speed steel turning blade shall not have cracks, grinding burns, Black scale and rust and other defects that affect performance. 5.2 Surface roughness
The upper limit of the surface roughness of the high-speed steel turning tool blade surface (excluding the end surface) is: Ral.6μm. 6 Marking and packaging
6.1 Marking
6.1.1 The product should be marked with:
The trademark of the manufacturer or seller;
Sectional size and length;
Material code (HSS).
6.1.2 The packaging box should be marked with:
The name, address and trademark of the manufacturer or seller; product name, section size, length, standard number; material code;
G/T 42f1.2--2004
Number of pieces,
Year and month of manufacture.
6.2 Packaging
The turning blades should be treated with rust prevention before packaging, and the packaging should be firm to prevent damage during transportation. 2
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