NATIONAL STANDARD OF THE GRINDING BALLS IN CHINA (1)
CAST GRINDING BALLS – FOREWORD
This standard is modified with the USA ASTM A532/A532M-93a (2003) ‘Standard specification for wear-resistant cast iron’ and EU standard EN12513:2000N ‘CAST WEAR-RESISTANT CAST IRON’ and other foreign advanced standards of the relevant provisions.
Compared with ASTM A532/A532M-93a(2003), the structure was made more editorial. The main technical contents are revised as follows:
–Added standard terms and definitions for grinding ball；
–The differences of mechanical properties of different parts of the grinding ball are specified；
—Sample inspection rules have been added；
—Added the requirements of package, mark, and delivery.
This standard replaces GB/T17445-1988 ‘CAST IRON BALLS.’
Compared with GB/T17445-1988, the main technical contents are revised as follows:
– Reducing the cast iron balls diameter tolerance
– Added the grades of alloyed casting balls
– Altered alloyed casting balls chemical composition
– Martensitic ductile iron grinding ball grade is added；
– Increase the hardness of high chrome contenting alloyed cast iron balls
Appendix A, B, and C of this Standard Are Standard Appendices
This standard is put forward by the national technical committee of foundry standardization (SAC/TC 54)
The participating drafting units: Anhui Fengxing wear-resistant Materials Incorporated Company; Jiangxi Copper Industry Group Machinery Manufacturing Co. , Ltd. ; Ma Anshan Yifeng Metallurgical Wear-resistant Materials Development Co. , Ltd. ; Anshan Dongtai Wear-resistant Materials Co. , Ltd. ; Ningguo Dongfang Wear-resistant Materials Co. , Ltd.; Ningguo Chengxin Wear-resistant Materials Co. , Ltd.; Anhui Institute of Mechanical Science
The responsible drafting unit: JINAN UNIVERSITY
The main drafter for this standard: LI WEI, SONG LIANG, CHEN ZONGMING, HUANG RUQING, LI JIABAO, WANG XIAOFEI, ZHAO JINBIN, TAN ZHAOCHENG
Successive releases of the standards replaced by this standard are as follows:
— GB / T17445-1998.