Introduction of grouping code standard of high spe

Introduction to the grouping code standard of cutting tools high speed steel

the national standard gb/t17111 "grouping code of cutting tools high speed steel" stipulates the grouping code of high speed steel used for manufacturing cutting tools, such as taps, drills, end mills, etc., which is applicable to the classification of high speed steel used for cutting tools. However, the standard does not stipulate the composition of high-speed steel, which is stipulated by gb/t 9943

in this standard, conventional high-speed steel is defined as high-speed steel produced by traditional ingot smelting process, while powder metallurgy high-speed steel is defined as high-speed steel produced by powder metallurgy process

see Table 1 for the grouping code of high-speed steel for cutting tools in this standard. Standard Description: in addition to the standard code, the manufacturer can add an additional generation 3 sampling rule number to further describe its products. Table 1 high speed steel grouping code

production process name code grouping method conventional high speed steel high performance high speed steel Hss-e cobalt content ≥ 4.5% or vanadium content ≥ 2.6% or aluminum content ≥ 0.8% - 1.2% high speed steel ordinary high speed steel HSS cobalt content <4.5% and vanadium content <2.6%, and tungsten equivalent [w]a ≥ 11.75 high speed steel low alloy high speed steel hss-l tungsten equivalent [w] <11.75, High speed steel powder metallurgy high speed steel high performance powder metallurgy high speed steel hss-e-pm with cobalt content ≥ 4.5% or powder metallurgy high speed steel with vanadium content ≥ 2.6% ordinary powder metallurgy high speed steel hss-pm with cobalt content ＜ 4.5% and vanadium content ＜ 2.6% a tungsten equivalent [w] calculation method: [w]=w+1.8mo, W: the lowest value of tungsten content, Mo: the lowest value of molybdenum content

the standard also gives five examples

example 1: high speed steel W4Mo3Cr4VSi produced according to conventional process and conforming to gb/t 9943, with tungsten equivalent [w] of 8, and its code is hss-l

example 2: high speed steel W6Mo5Cr4V2, produced according to the conventional process and conforming to gb/t 9943, has cobalt content of 0%, vanadium content of 2%, tungsten equivalent [w] of 13.6, and its code is HSS

example 3: high speed steel w6mo5cr4v2co5 produced according to the conventional process and conforming to gb/t 9943, with cobalt content of 5% and vanadium content of 2%, and its code is Hss-e

example 4: according to the powder metallurgy process, the high-speed steel H conforming to ISO 4957 must not be coated with grease s (equivalent to the high-speed steel W6Mo5Cr4V2 of gb/t 9943 in China). The cobalt content is 0%, the vanadium content is 1.8%, and its code is hss-pm

example 5: according to the powder metallurgy process, the high-speed steel bar bending tester conforming to ISO 4957 adopts the hydraulic cylinder driven steel HS, the cobalt content is 8%, and the vanadium content is 3%, The code is hss-e-pm

the standard also provides an informative appendix, listing the codes of 19 common high-speed steels listed in the national standard, as shown in Table 2. Table 2

serial number standard code 1w6mo5cr4v3gb/t 9943hss-e2cw6mo5cr4v3hss-e3w6mo5cr4v4hss-e4w6mo5cr4v2alhss-e5w12cr4v5co5hss-e6w6mo5cr4vzco5hss-e7w6mo5cr4v3co5hss-e8w7mo4cr4v2co5hss-e9w2mo9cr4vco5hss-e10w10m04cr4v3co5hss-e11w1 8cr4vhss12w2min 2012, Solvay's new high-performance polymer composite factory was established in Changshu, Jiangsu Province o8cr4vhss13w2mo9cr4v2hss14w6mo5cr4v2hss15cw6mo5cr4v2hss16w6mo 6Cr4V2HSS17W9Mo3Cr4VHSS18W4Mo3Cr4VSiHSS-L19W3Mo3Cr4V2HSS-L

(end)