The influence of chromic nickel content to ZG32CrNiMo function
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33 ％ , alloy B and alloy C are divided add C content to 0.
Outside 33 ％ , change content of Cr, Ni respectively. Alloy B design is tall Cr composition, cr content comes 0.
92 ％ ; Alloy C design is tall Ni composition, ni content comes 0.
95 ％ ; Composition of other and main alloy keeps changeless like Mo, Mn. The classics after fusion chemical analysis, each alloy composition sees a table 1. Alloy first mould becomes standard test block, rework pounds sample than V breach into standard summer. Method of the 3 experiments between train of temper by dipping in water and result 3. 1 quench ZG32CrNiMo is not had in because have a name,experimenting this one brand, have a name via consulting, ZG30CrNiMo is close to ZG32CrNiMo most, quench temperature is 850 ℃ formerly: , can push those who know ZG32CrNiMo to quench temperature should be between 900 ℃ of 800 ～ , it is between 895 ℃ of 825 ～ , every other 10 ℃ quench as temperature, in all 8 temperature undertake quenching experimenting, quench hardness is like a watch 2 reach the graph is shown 1 times. Graph 1 show: Of 3 alloy quench hardness peak value is in 855 ℃ . Because this chooses 855 ℃ ,quench have the test below. 3. 2 quench temper experiment uses 855 ℃ to be planted to A, B, C3 alloy undertakes quenching, in 200 ℃ ～ inside 700 ℃ interval, chose 11 temper temperature to undertake temper experiments, temper hardness sees a table 3 reach a figure 2. 3. 3 low temperature pound test sample to quench in 855 ℃ , be in respectively 200, 250, 300, 350, 400, 500, 600 ℃ temper, temper hind puts sample into filling the vacuum flask that has alcohol, join liquid nitrogen slowly, arrive when thermal drop - when 23 ℃ , the affiliation that controls liquid nitrogen is measured, maintain constant temperature, heat preservation after ten minutes take out sample quickly to undertake pounding an experiment, if test result is expressed 4 reach a figure 3. 4 results are analysed by quench hardness sees 3 kinds of alloy all reach maximum in 855 ℃ , it is HRC56 respectively.
8HRC56.
9, HRC56.
7 differ not quite, by concussion tenacity result is seen, the alloy C tenacity of tall Ni content is apparent A of prep above alloy, B, in 350 ℃ 3 kinds of alloy all produce temper brittleness, the concussion tenacity that before this 300 ℃ temper has alloy C only (α K =16.
1The requirement that J/cm2) achieves spare parts Ⅰ (15 J/cm2) of α K ≥ , in this temperature temper, the hardness of alloy C is HB 495, the hardness of Ⅰ of contented also spare parts (HB 480-520) requirement. Alloy C is in temper of 600 ℃ above, ≥ of K of concussion tenacity α 21.
9J/cm2, the requirement that can satisfy spare parts Ⅱ and Ⅲ (20 J/cm2) of α K ≥ , and the hardness requirement that can achieve spare parts Ⅱ and Ⅲ respectively in 650 ℃ and 680 ℃ temper. Far outclass of this temper temperature 600 ℃ , this shows, alloy C quenchs in 855 ℃ , can satisfy spare parts Ⅰ , Ⅱ , Ⅲ respectively via different temperature temper enlist in army conditional requirement. And alloy A, B cannot satisfy 3 kinds of spare partses at the same time enlist in army requirement. Composition of 5 conclusion 1) is C-0.
33 ％ , Cr-0.
48 ％ , Ni-0.
95 ％ , Mo-0.
28 ％ , Mn-0.
The alloy classics of 66 ％ can satisfy spare parts of 3 kinds of rig at the same time after different heat treatment enlist in army requirement. 2) this alloy quenchs in 855 ℃ , 300 ℃ temper can satisfy HB 485-520 of hardness of spare parts Ⅰ , ℃ of 15 J/cm2(-20 of α K ≥ ) technical requirement. 3) this alloy quenchs in 855 ℃ , 650 ℃ temper can satisfy ℃ of 20 J/cm2(-20 of ≥ of K of HB 269-321 of hardness of spare parts Ⅱ , α ) technical requirement. 4) this alloy quenchs in 855 ℃ , 680 ℃ temper can satisfy ℃ of 20 J/cm2(-20 of ≥ of K of HB 229-285 of hardness of spare parts Ⅲ , α ) technical requirement. CNC Milling CNC Machining