Shanghai Daoqin Plastics Co., Ltd.

        一. meet/satisfy as conditions requirements

        1. wear resistance

        坯 material in mold type in property deformation 时, type surface flow also sliding, make type surface and material generate 剧烈 摩 scratch, from 而导致 mold abrasion loss 而失效, therefore, material wear resistance is mold most basic, most important property can 之一.

         hardness is effect/influence wear resistance main/primary factors. generally lower, mold parts hardness high, abrasion loss amount small, wear resistance good. another, wear resistance also and material in carbon material types type, amount, 形态, large small and distribution has 关.

        2. strong/high tough property

         mold as conditions large more separation poor, has 常承受 relatively large impact negative 荷, from 而导致脆 property fracture. is anti mold parts in as 时突然脆断, mold need tool has relatively high strong/high degree and tough property. mold tough property main/primary 取决于材 material carbon amount, degree and 组织状态.

        3. fatigue fracture property can

         mold as process in, in ring force long function lower, 往往导致 fatigue fracture. its has small can amount more impact fatigue fracture, tensile fatigue fracture, fatigue fracture and bending fatigue fracture.

         mold fatigue fracture property can main/primary 取决于 its strong/high degree, tough property, hardness, and material in material content.

        4. high temperature property can

        当 mold as temperature degree relatively high 时, make hardness and strong/high degree decline, mold abrasion loss, or generate property deformation 而失效. therefore, mold material tool has relatively high resistant stability property, ensure mold in as temperature degree lower, tool has relatively high hardness and strong/high degree.

        5. resistant cold hot fatigue property can

         has mold in as process in 处于反复 add hot and cooling 状态, make type surface 受拉, pressure force function, surface crazing and 剥落, increase large scratch force, retardant property deformation, reduce dimensions degree, from 而导致 mold 失效. cold hot fatigue is hot as mold main/primary 形式之一, this category of mold tool has relatively high resistant cold hot fatigue property can.

        二. meet/satisfy process property can requirements

         mold manufacturing generally need 经 锻造, processing, hot and other 几道工序. is ensure mold manufacturing quality, reduce production cost, its material tool has good can property, processing property, hard property, property and can abrasion property; also tool has small oxidation, carbon property and deformation cracking toward.

        1. can property

         tool has relatively low hot deformation resistant force, property good, temperature degree scope/range wide, 锻裂, cold and 析出网状 carbon material toward low.

        2.退火 process property

        球化退火 temperature degree scope/range wide, hardness low 且波动 scope/range small, rate high.

        3.切削 processing property

        切削 use amount large, tool loss consumption low, processing surface coarse degree low.

        4. oxidation, carbon property

         high temperature add hot 时, resistant oxidation property can good, carbon speed degree slow, for add hot 介质不敏感, generate 麻点倾 toward small.

        5.淬 hard property

        淬火 rear tool has uniform high surface hardness.

        6.淬透 property

        淬火 rear can obtain relatively deep hard 层, using/adopting and 淬火介质就 can hard.

        7.淬火 deformation cracking toward

        常规淬火体积变化 small, warpage, light micro, deformation toward low. 常规淬火 cracking property low, for temperature degree and parts 形状不敏感.

        8. can abrasion property

        砂轮 versus for loss consumption small, 无烧伤, abrasion use amount large, for quality and cooling conditions 不敏感, easy abrasion and abrasion cracks.

        三. meet/satisfy property requirements

         in to mold material selection 时, must 考虑经济 property this 一原则, can can reduce manufacturing cost. therefore, in meet/satisfy use property can front lower, selection price relatively low, can use carbon 钢就不 use alloy 钢, can use Domestic material use Imported material.

         has mold, plastics 模, in as 时, due to plastics in in chlorine, fluorine and other 元素, hot rear separation analysis 出HCl, HF and other strong/high property gas 体, mold type surface, add large its surface coarse degree, add abrasion loss 失效.