Made of M2 steel grinding wheel ro雜還lling with 1200 ~ 1210 DEG C體文 quenching and 600 DEG C neutral sa畫員lt classification into草火 260 to 280 DEG C nitrate isother黃學mal 2.5h, the tempe下黃ring process for 580 DE煙弟G C * 1h+590 DEG C * 1h+560 DEG C 行跳x H nitrate wit中些h fire. After temper飛放ing hardness 61 ~ 北火63HRC. According to在媽 the user feedback, the best har司喝dness of M14 above lar司門ge specifications of the ro中自lling wheel is 63HRC, M12 the冷一 following small 數女specifications for 62HRC. With短花 the above low temperature quen做答ching high temperature tem媽微pering of the ro就道lling wheel did not p新白roduce grinding crack, the service life綠開 of the original Crl2MoV steel那但 increased 3 ~ 4 times

Can also accordi讀是ng to the thread rolli一土ng wheel service formulat拍知ing practical pro南時cess, such as roller diamet醫報er of 120 ~ phi 140mmX40 ~ 在就70mm (thickness) of 公腦Q235 steel rolling wh技就eels, the lower quen懂鐘ching temperature and receive制秒d good results, the introdu短林ction of the process are as fol高弟lows: 500 DEG C well t化購ype furnace preheat銀費ing, 850 ~ 860 路如Deg. C * 40S/mm salt bath of pre heat計都, 1150 to 1160 鐘路DEG C * 20S/mm heating, 580 to 620 DEG 玩音C grade after 260 ~ 280 DE服雪G C x 2H nitrate isothermal and 在聽580 to 580 DEG C * 1h對熱+550 DEG C x h * 2 times 3 t老金imes in total nitrate tempering, af飛樹ter tempering har校時dness 61 ~ 62 HRC. The life span of 志街the M4 ~ M8 rolling wheel is in習議creased from 20 thou討學sand to 1.5 pieces 亮坐of the original Crl2MoV steel to 3.8 pi拿理eces of steel.