西門子氣體分析儀-測(cè)量頭C75121-Z1286-C1安全至上操作說(shuō)明
3淬透性和淬硬性淬硬性主要取決于鋼的碳含量,淬透性主要取決于鋼的化學(xué)成分、合金元素含量和淬火前的組織狀態(tài)。對(duì)于大部分要求高硬度的冷作模具,對(duì)淬硬性要求較高;對(duì)于大部分熱作模具和塑料模具,對(duì)于硬度的要求不太高,往往更多地考慮其淬透性;特別是對(duì)于一些大截面深型腔模具,為了使模具的心部也能得到良好的組織和均勻的硬度,就要求選用淬透性好的模具鋼。另外對(duì)于形狀復(fù)雜、要求精度高又容易產(chǎn)生熱處理變形的模具,為了減少其熱處理變形,往往盡可能采用冷卻能力弱的淬火介質(zhì)(如油冷、空冷、加壓淬火或鹽浴淬火),就需要采用淬透性較好的模具材料,以得到滿意的淬火硬度和淬硬層深度。
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ALLEN BRADLEY 2364-SPE01A / 2364SPE01A (NEW IN BOX)
ALLEN BRADLEY 1336-F1-SP13A / 1336F1SP13A (NEW IN BOX)
Allen-Bradley 800T-A2D1 Series T Push Button Black Flush Head 1NO ! WOW !
ALLEN BRADLEY 815COV169 / 815COV169 (Surplus New In Box)
ALLEN BRADLEY 151133 / 151133 (Used)
ALLEN BRADLEY 102840 / 102840 (USED TESTED CLEANED)
ALLEN BRADLEY 1772-LWP / 1772LWP (Used)
ALLEN BRADLEY 195-FA04 ADD ON CONTACT BLOCK W14
ALLEN BRADLEY 119527 / 119527 (USED TESTED CLEANED)
ALLEN BRADLEY 104-A12ND3 / 104A12ND3 (USED TESTED CLEANED)
ALLEN BRADLEY 2090-XXNPMP-14S20 / 2090XXNPMP14S20 (Surplus New In Box)
ALLEN BRADLEY 20AD2P1A3AYNAENN / 20AD2P1A3AYNAENN (USED TESTED CLEANED)
ALLEN BRADLEY 20AC3P5A3AYNANNN / 20AC3P5A3AYNANNN (USED TESTED CLEANED)
ALLEN BRADLEY 8520-ETCP / 8520ETCP (USED TESTED CLEANED)
ALLEN BRADLEY N54 U N/AA 600V USED
ALLEN BRADLEY 20BD011A3NYNAEC1 / 20BD011A3NYNAEC1 (USED TESTED CLEANED)
Allen Bradley Drive Control Board, 42305-053-51G, Used, WARRANTY
ALLEN BRADLEY 140M-D8N-B40 / 140MD8NB40 (NEW IN BOX)
ALLEN BRADLEY AUXILIARY CONTACT BLOCK 40768-451-06
ALLEN BRADLEY 3100-CPU / 3100CPU (USED TESTED CLEANED)
Siemens 6ES7-314-6CG03-0AB0
SIEMENS 6RB2160-OFB00
SIEMENS 6ES5-373-0AA41
Siemens 6ES7135-4FB01-0AB0 《福建鴻飛達(dá)誠(chéng)信延續(xù)超低價(jià)》
SIEMENS 6ES7132-4BB01-0AB0
Siemens 6ES7195-1GA00-0XA0
SIEMENS 3RV1-021-1GA10
SIEMENS 6ES5-700-1LA12
Siemens 505-6511
Siemens 6ES7277-0AA22-0XA0
SIEMENS 6EP1931-2EC21
SIEMENS 6FX1128-1BA00
SIEMENS 6SL3040-0MA00-0AA1
SIEMENS 6ES7232-0HB22-0XA0
SIEMENS 6ES7-193-1CH00-0XA0
SIEMENS 6ES5-376-1AA31
SIEMENS 6ES7194-1KA01-0XA0
SIEMENS 6SE6400-1PB00-0AA0 《福建鴻飛達(dá)誠(chéng)信延續(xù)超低價(jià)》
SIEMENS 6SC6170-0FC01
SIEMENS 545-1101
SIEMENS 6SE7-018-0ES87-2DA0
SIEMENS 6ES7131-4BD00-0AA0
Siemens 6GK1502-3BA00
Siemens 8WA1011-1BF21
Siemens 6ES7921-3BE10-0AA0
7381A66G04西屋WDPF FTC光纖板(7381A66G04)
7381A81G01西屋WDPF MDM板(7381A81G01)
7381A81G02西屋WDPF MDM板(7381A81G02)
7381A81G03西屋WDPF MDM板(7381A81G03)
7381A83G01西屋WDPF MSE板(7381A83G01)
7381A83G02西屋WDPF MSE板(7381A83G02)
7381A86G01西屋WDPF NL-1032 120VAC模塊(藍(lán)色塑料)(7381A86G01)
7381A87G01西屋WDPF NL-1062 120VAC模塊(藍(lán)色塑料)(7381A87G01)
7381A88G01西屋WDPF MD板(7381A88G01)
7381A93G01西屋WDPF MHC板(7381A93G01)
7381A93G03西屋WDPF MHC板(7381A93G03)
7381A93G04西屋WDPF MHC板(7381A93G04)
7381A93G05西屋WDPF MHC板(7381A93G05)
7381A94001西屋WDPF MUT PC終端(7381A94001)
7381A94G02西屋WDPF MUT PC未端接(7381A94G02)
7412C33G01西屋WDPF雙風(fēng)扇組件輸入(7412C33G01)
486西站柜內(nèi)的7412C33G02西屋WDPF雙風(fēng)扇組件(頂部)(7412C33G02)
772B216G01西屋WDPF SBC配置板(772B216G01)
772B216G02西屋WDPF SBC配置板(772B216G02)
772B216G03西屋WDPF SBC配置板(772B216G03)
在鐵的組分中QDY鐵礦中的二價(jià)鐵氧化物和三價(jià)鐵氧化物,經(jīng)與硫酸反響后生成硫酸亞鐵FeSO4和硫酸高鐵Fe2(SO4)3,硫酸亞鐵在酸性溶液中比較安穩(wěn),pH5時(shí),才開端水解生成氫氧化鐵沉積,其反響式為:FeSO4+2H2O→Fe(OH)2↓+H2SO4硫酸高鐵在酸性溶液中是不安穩(wěn)的,在pH2.5時(shí)就開端水解生成堿式硫酸鹽或氫氧化物沉積,其反響式為:Fe2(SO4)3+2H2O→2Fe(OH)SO4↓+H2SO4Fe2(SO4)3+6H2O→2Fe(OH)3↓+3H2SO4這些鐵的氫氧化物是有害的,在鈦液水解時(shí)它們一道沉積到偏鈦酸中無(wú)法經(jīng)過(guò)水洗除掉,在煅燒時(shí)又變成氧化鐵使鈦?zhàn)兩?、白度下降?yán)重影響制品的質(zhì)量。