Shanghai Daoqin Plastics Co., Ltd.

测定材 material or parts in hot process process in obtain hot 处理效果 difficult easy degree process property can experiment/testing. hot process more property ﹐不 can can use mono property can indicators table/sheet and 评定. Common hot process property can has property ﹑晶粒 long large toward ﹑淬裂敏感 property ﹑脱 carbon property ﹑回火脆 property and other. property table/sheet in 淬火时整 截面 by hard deep shallow degree ﹐ generally use in 淬火时 can in 整 圆柱截面 upper hard most large 临界直径 table/sheet 示. most commonly used property experiment/testing methods is experiment/testing method. use this type of methods 时﹐ will dimensions Sample add hot to temperature degree ﹐然 rear in experiment/testing machine upper 一端喷 water cooling, full cooling rear 测定沿 its high degree upper table/sheet hardness distribution ﹐以端面至淬 hard to hardness value table/sheet 徵. long large toward or hot property ﹐指 metal in add hot process in coarse toward large small. generally different temperature degree metal degree ﹐以晶粒开始急剧 long large temperature degree amount long large toward. 淬裂敏感 property metal in 淬火时產生 cracks toward. has 统一 标準评定 methods ﹐ generally use 一定形状 Sample different cooling can force cold 介质淬火 rear ﹐ statistics cracks how much versus comparison relatively. carbon property in add hot and temperature process in table/sheet carbon oxidation toward. generally will Sample in versus add hot ring lower maintain time rear ﹐ use versus method or analysis method 测定脱 carbon deep shallow 评定. this for bearings ﹑刀 tool ﹑ injection molding parts mold ﹑ elastic and other use is types very important indicators. 回火脆 property toward 淬火钢 in 400～600℃ temperature degree 区间回火时 脆化 phenomenon ﹐也称 can 逆回火脆 property. generally use in rear slow cold lower and water cold lower tough property ratio value large small amount ﹐也 can use rear fast cold and slow cold types different lower 钢 脆 property temperature degree large small amount.